Forging, or industrial forging, is one of the most fundamental and robust methods of producing metal parts. In this process, unlike casting, the metal is not melted; instead, it is brought into its final shape by applying compressive forces (pressure, impact, or pressing). Because the structure of the metal is deformed in the solid state, its mechanical properties become far better and stronger than in many other processes.<\/p>\n
Forging has been used for thousands of years, but today, with the help of multi-hundred-ton presses, multi-zone furnaces, and modern equipment, it has become one of the main pillars of producing critical components in industry.<\/p>\n
In forging, the metal is deformed under the following conditions:<\/p>\n
Application of force in the form of impacts
(for example, air hammers or impact presses)<\/p>\n<\/li>\n
Application of a continuous and uniform force
(hydraulic or mechanical presses)<\/p>\n<\/li>\n
Application of pressure in hot, warm, or cold conditions<\/p>\n<\/li>\n<\/ul>\n
These forces cause plastic deformation of the metal without the internal structure fracturing. This factor leads to high density, high strength, and impact resistance.<\/p>\n
In this method, the metal is placed between two simple metallic surfaces (usually flat or semi-round), and the die does not restrict the final shape of the part. The worker or operator moves the workpiece between the blows until the final shape is obtained.<\/p>\n
Advantages:<\/strong><\/p>\n Suitable for large parts<\/p>\n<\/li>\n High mechanical strength<\/p>\n<\/li>\n Uniform grain flow<\/p>\n<\/li>\n Ability to produce special parts without the need for a shaped die<\/p>\n<\/li>\n<\/ul>\n Applications:<\/strong> In this method, the die contains the final shape of the part. The metal is placed inside the die cavity and, under pressure, is brought into its final shape.<\/p>\n Advantages:<\/strong><\/p>\n Suitable for mass production<\/p>\n<\/li>\n High accuracy<\/p>\n<\/li>\n Ability to produce complex parts<\/p>\n<\/li>\n Excellent strength<\/p>\n<\/li>\n<\/ul>\n Applications:<\/strong> Hot Forging<\/strong> Warm Forging<\/strong> Cold Forging<\/strong> Exceptional strength due to densification of the grains<\/p>\n<\/li>\n Longer service life of the component<\/p>\n<\/li>\n Excellent fatigue resistance<\/p>\n<\/li>\n Suitable for critical parts subjected to high loads<\/p>\n<\/li>\n Reduced porosity compared to casting<\/p>\n<\/li>\n<\/ul>\n Aerospace industries<\/p>\n<\/li>\n Automotive industry<\/p>\n<\/li>\n Oil, gas, and petrochemical industries<\/p>\n<\/li>\n Power plants<\/p>\n<\/li>\n Energy industries<\/p>\n<\/li>\n Precision industrial equipment<\/p>\n<\/li>\n<\/ul>\n To prevent defects, cracking, incomplete die filling, or distortion, it is essential to observe the following:<\/p>\n Precise temperature control before and during forming<\/p>\n<\/li>\n Adjusting blow or pressure rate<\/p>\n<\/li>\n Reducing friction between the part and the die<\/p>\n<\/li>\n Using lubricants (graphite-based, MoS\u2082, oil-based)<\/p>\n<\/li>\n Controlling the cooling rate<\/p>\n<\/li>\n<\/ul>\n After forging, the following operations are usually carried out:<\/p>\n Heat treatment<\/p>\n<\/li>\n Finish machining<\/p>\n<\/li>\n Surface finishing<\/p>\n<\/li>\n Stress relieving<\/p>\n<\/li>\n<\/ul>\n In the forging section, the main materials used include:<\/p>\n Water-based graphite lubricants<\/p>\n<\/li>\n Oil-based lubricants<\/p>\n<\/li>\n BN (boron nitride) lubricants<\/p>\n<\/li>\n Granules and dry lubricating powders<\/p>\n<\/li>\n High-temperature greases for mechanical parts of the machine<\/p>\n<\/li>\n<\/ul>\n An appropriate lubricant:<\/p>\n Prevents sticking of the part to the die<\/p>\n<\/li>\n Increases die life<\/p>\n<\/li>\n Ensures better filling of the die cavity<\/p>\n<\/li>\n Produces smoother surface on the part<\/p>\n<\/li>\n Prevents cracking and wear<\/p>\n<\/li>\n<\/ul>\n Die casting (HPDC \u2013 High Pressure Die Casting) is one of the most important and advanced methods of producing metal components in automotive, household appliances, electronics, machinery, and other industries. In this method, molten metal is injected into a steel die at very high pressure, and a part with excellent dimensional accuracy and a smooth final surface is produced.<\/p>\n Die casting is suitable for parts that:<\/p>\n Require precise dimensions<\/p>\n<\/li>\n Need a smooth final surface<\/p>\n<\/li>\n Have complex shapes<\/p>\n<\/li>\n Must be produced in large quantities<\/p>\n<\/li>\n<\/ul>\n Because of its high speed and the ability to produce complex parts, this process has become extremely widely used worldwide.<\/p>\n Die casting consists of several precise steps, and proper execution of each step determines the final quality of the part.<\/p>\n Common metals used in die casting:<\/p>\n Aluminum<\/p>\n<\/li>\n Zinc<\/p>\n<\/li>\n Magnesium<\/p>\n<\/li>\n Brass \/ copper (in some machines)<\/p>\n<\/li>\n<\/ul>\n The metal is melted in the furnace to the specified temperature and prepared for injection.<\/p>\n The steel die consists of two sections:<\/p>\n Fixed half<\/p>\n<\/li>\n Moving half<\/p>\n<\/li>\n<\/ul>\n Before injection, the die must be fully closed and locked. This is the most important stage of die casting.<\/p>\n The molten metal is injected into the die cavity by:<\/p>\n Plunger<\/p>\n<\/li>\n Injection piston<\/p>\n<\/li>\n<\/ul>\n with a pressure of 700 to 1500 bar.<\/p>\n Reasons for using high pressure:<\/strong><\/p>\n High filling speed of the die<\/p>\n<\/li>\n Prevention of premature solidification<\/p>\n<\/li>\n Reduction of porosity<\/p>\n<\/li>\n Filling of all details of the die<\/p>\n<\/li>\n<\/ul>\n After injection, the molten metal must solidify at high speed. Water-based lubricants<\/p>\n<\/li>\n Die-coat materials<\/p>\n<\/li>\n Mold sprays<\/p>\n<\/li>\n<\/ul>\n are used.<\/p>\n The heat is rapidly transferred from the die surface to the cooling system.<\/p>\n After solidification, the die opens and the part is ejected by:<\/p>\n Ejector pins<\/p>\n<\/li>\n<\/ul>\n Lubrication of the pins with high-temperature greases is very important.<\/p>\n Die-cast parts usually require:<\/p>\n Runner and overflow trimming<\/p>\n<\/li>\n Grinding<\/p>\n<\/li>\n Deburring<\/p>\n<\/li>\n Polishing<\/p>\n<\/li>\n Shot blasting<\/p>\n<\/li>\n Painting or plating<\/p>\n<\/li>\n<\/ul>\n There are two main types of machines:<\/p>\n Characteristics:<\/strong><\/p>\n The molten metal is located inside the injection system<\/p>\n<\/li>\n Very high production speed<\/p>\n<\/li>\n Suitable for alloys with low melting point<\/p>\n<\/li>\n<\/ul>\n Applications:<\/strong><\/p>\n Zinc<\/p>\n<\/li>\n Magnesium<\/p>\n<\/li>\n<\/ul>\n Characteristics:<\/strong><\/p>\n The molten metal is in a separate furnace<\/p>\n<\/li>\n The molten metal is transferred into the injection cylinder using a ladle<\/p>\n<\/li>\n Can withstand very high temperatures<\/p>\n<\/li>\n<\/ul>\n Applications:<\/strong><\/p>\n Aluminum<\/p>\n<\/li>\n Copper<\/p>\n<\/li>\n Brass<\/p>\n<\/li>\n<\/ul>\n These machines are the most common in the automotive industry.<\/p>\n Outstanding dimensional accuracy<\/p>\n<\/li>\n Fast and high-volume production<\/p>\n<\/li>\n Smooth and glossy surface<\/p>\n<\/li>\n Ability to produce very complex parts<\/p>\n<\/li>\n High die life in mass production<\/p>\n<\/li>\n<\/ul>\n Very high die cost<\/p>\n<\/li>\n Limitations in producing very large parts<\/p>\n<\/li>\n Suitable only for metals with relatively low melting points<\/p>\n<\/li>\n Requires precise temperature and lubrication control<\/p>\n<\/li>\n<\/ul>\n Die casting is one of the most complex processes in terms of lubrication and consumable materials. Ladle coating<\/p>\n<\/li>\n Coverall<\/p>\n<\/li>\n Die coat<\/p>\n<\/li>\n Degassing agent<\/p>\n<\/li>\n High-temperature grease<\/p>\n<\/li>\n Silver grease<\/p>\n<\/li>\n Black grease<\/p>\n<\/li>\n Water-based graphite<\/p>\n<\/li>\n Plunger oil<\/p>\n<\/li>\n Hydraulic oil<\/p>\n<\/li>\n Granules<\/p>\n<\/li>\n Mold sprays<\/p>\n<\/li>\n Flux materials<\/p>\n<\/li>\n<\/ul>\n The most important are:<\/p>\n Coverall<\/p>\n<\/li>\n Refining flux<\/p>\n<\/li>\n Degassing tablets<\/p>\n<\/li>\n<\/ul>\n All three play a major role in the final quality of the part.<\/p>\n Die casting is highly dependent on the skill of the operator:<\/p>\n Adjusting the pressure<\/p>\n<\/li>\n Controlling die temperature<\/p>\n<\/li>\n Setting lubricant quantity<\/p>\n<\/li>\n Adjusting the spray gun<\/p>\n<\/li>\n Setting injection speed<\/p>\n<\/li>\n<\/ul>\n A skilled operator can improve the quality of the part by up to 30%.<\/p>\n Industrial standards include:<\/p>\n X-ray inspection<\/p>\n<\/li>\n Porosity testing<\/p>\n<\/li>\n Leak testing<\/p>\n<\/li>\n Dimensional inspection<\/p>\n<\/li>\n Hardness testing<\/p>\n<\/li>\n Metallographic structure control<\/p>\n<\/li>\n<\/ul>\n Extrusion is one of the most precise and practical methods of forming metals and polymers. This method allows the production of very long and complex cross-sections with high quality and uniform surfaces. The principle of extrusion is similar to squeezing toothpaste out of a tube: This process is widely used for metals such as aluminum, copper, steel, magnesium, as well as polymeric materials.<\/p>\n For metal extrusion:<\/p>\n The raw material is usually a billet (short ingot).<\/p>\n<\/li>\n The billet is heated in a furnace to its softening temperature.<\/p>\n<\/li>\n For aluminum, the temperature is typically between 400\u2013500 \u00b0C.<\/p>\n<\/li>\n<\/ul>\n For polymer extrusion:<\/p>\n The raw material is polymer granules.<\/p>\n<\/li>\n The granules enter the barrel and are melted by heaters.<\/p>\n<\/li>\n<\/ul>\n In metal extrusion:<\/p>\n The billet is subjected to the pressure of a ram\/piston.<\/p>\n<\/li>\n A pressure of about 200 to 400 MPa is applied.<\/p>\n<\/li>\n The material passes through the die opening and takes on the final shape.<\/p>\n<\/li>\n<\/ul>\n In plastic extrusion:<\/p>\n A screw conveys, melts, and pushes the granules towards the die.<\/p>\n<\/li>\n The output is continuous.<\/p>\n<\/li>\n<\/ul>\n After exiting the die:<\/p>\n For metals: cooling is done with air or water.<\/p>\n<\/li>\n For polymers: usually a water bath (cooling bath) is used.<\/p>\n<\/li>\n<\/ul>\n Goal:<\/strong> After cooling:<\/p>\n The product is cut to the required lengths.<\/p>\n<\/li>\n For aluminum, additional operations such as anodizing, powder coating, or polishing may be carried out.<\/p>\n<\/li>\n For steel, heat treatment or anti-corrosion coatings may be applied.<\/p>\n<\/li>\n<\/ul>\n Ability to produce profiles with complex cross-sections<\/p>\n<\/li>\n Smooth surface finish<\/p>\n<\/li>\n Very high dimensional accuracy<\/p>\n<\/li>\n Suitable for mass production<\/p>\n<\/li>\n Capability to produce long lengths<\/p>\n<\/li>\n<\/ul>\n Limitations for very thick sections<\/p>\n<\/li>\n Die wear at high temperatures<\/p>\n<\/li>\n Need for precise control of pressure and temperature<\/p>\n<\/li>\n<\/ul>\n Hot extrusion requires highly resistant lubricants:<\/p>\n Water-based graphite lubricants<\/p>\n<\/li>\n Oil-based lubricants<\/p>\n<\/li>\n BN (boron nitride) coatings for dies<\/p>\n<\/li>\n Dry powders and lubricating granules<\/p>\n<\/li>\n Anti-friction die coatings<\/p>\n<\/li>\n<\/ul>\n These materials increase die life and prevent the billet from sticking.<\/p>\n Production of aluminum profiles<\/p>\n<\/li>\n Pipe production<\/p>\n<\/li>\n Cable and jacket production<\/p>\n<\/li>\n Manufacture of precision parts<\/p>\n<\/li>\n Forming of steel and copper in the automotive industry<\/p>\n<\/li>\n Metal parts for aerospace and energy industries<\/p>\n<\/li>\n<\/ul>\n Ladle coating is a refractory material applied to the inside of ladles, tundishes, and tools that come into contact with molten metal. This material is usually in the form of a slurry and its purpose is to create a protective layer to prevent:<\/p>\n Reaction of the molten metal with the ladle<\/p>\n<\/li>\n Sticking of molten metal<\/p>\n<\/li>\n Inclusion formation<\/p>\n<\/li>\n Thermal shock<\/p>\n<\/li>\n Rapid erosion of the ladle<\/p>\n<\/li>\n<\/ul>\n Ladle coating directly affects melt quality and the quality of the final part.<\/p>\n Especially in aluminum, cast iron, and steel alloys.<\/p>\n Aluminum melt temperature: ~700 \u00b0C<\/p>\n<\/li>\n Cast iron: ~1300 \u00b0C<\/p>\n<\/li>\n Steel: ~1600 \u00b0C<\/p>\n<\/li>\n<\/ul>\n Without coating, the ladle will crack rapidly.<\/p>\n The coating prevents oxides and scale from entering the molten metal.<\/p>\n The surface quality and the corners\/edges of the final part are greatly improved.<\/p>\n Thorough cleaning of the ladle<\/p>\n<\/li>\n Stirring the coating until fully homogeneous<\/p>\n<\/li>\n Application by brush, spray, or dipping<\/p>\n<\/li>\n Drying at 150\u2013250 \u00b0C<\/p>\n<\/li>\n Preheating the ladle before contact with molten metal<\/p>\n<\/li>\n<\/ul>\n Type of molten metal<\/p>\n<\/li>\n Operating temperature<\/p>\n<\/li>\n Chemical compatibility<\/p>\n<\/li>\n Coating thickness<\/p>\n<\/li>\n Drying speed<\/p>\n<\/li>\n<\/ul>\n Coverall is a powder or tablet material that is poured onto the surface of the melt and has the following functions:<\/p>\n Preventing oxidation of aluminum<\/p>\n<\/li>\n Collecting inclusions and slag<\/p>\n<\/li>\n Preventing evaporation of alloying elements<\/p>\n<\/li>\n Reducing dissolved gases<\/p>\n<\/li>\n Improving the surface quality of the part<\/p>\n<\/li>\n<\/ul>\n Chloride salts (NaCl, KCl)<\/p>\n<\/li>\n Fluorides (CaF\u2082, NaF)<\/p>\n<\/li>\n Carbonates<\/p>\n<\/li>\n Oxides<\/p>\n<\/li>\n Anti-oxidation additives<\/p>\n<\/li>\n<\/ul>\n Powder<\/p>\n<\/li>\n Tablet<\/p>\n<\/li>\n Flux-based materials<\/p>\n<\/li>\n<\/ul>\n Pouring on the melt surface<\/p>\n<\/li>\n Stirring with a graphite tool<\/p>\n<\/li>\n Collecting the slag layer<\/p>\n<\/li>\n Transferring the refined melt<\/p>\n<\/li>\n<\/ul>\n Die coat is a refractory coating applied to metal dies used in die casting, forging, and casting processes.<\/p>\n Preventing sticking of the molten metal<\/p>\n<\/li>\n Local cooling of the die<\/p>\n<\/li>\n Increasing die life<\/p>\n<\/li>\n Improving surface finish of the part<\/p>\n<\/li>\n<\/ul>\n Water-based<\/p>\n<\/li>\n Oil-based<\/p>\n<\/li>\n Alcohol-based<\/p>\n<\/li>\n<\/ul>\n Mixing to proper concentration<\/p>\n<\/li>\n Application by spray or brush<\/p>\n<\/li>\n Drying<\/p>\n<\/li>\n Start of production<\/p>\n<\/li>\n<\/ul>\n Suitable for:<\/p>\n Pins<\/p>\n<\/li>\n Slides<\/p>\n<\/li>\n Bushings<\/p>\n<\/li>\n Die locking systems<\/p>\n<\/li>\n<\/ul>\n Types:<\/strong>\u00a0Graphite-based, copper-based, molybdenum-disulfide-based.<\/p>\n Used for:<\/p>\n Bolts<\/p>\n<\/li>\n Threads<\/p>\n<\/li>\n Hot plates<\/p>\n<\/li>\n Threads of heating elements<\/p>\n<\/li>\n<\/ul>\n Temperature resistance up to about 1000 \u00b0C.<\/p>\n Graphite \/ MoS\u2082-based, Fine graphite particles suspended in water with an emulsifier.<\/p>\n Die casting<\/p>\n<\/li>\n Forging<\/p>\n<\/li>\n Aluminum casting<\/p>\n<\/li>\n Hot dies<\/p>\n<\/li>\n<\/ul>\n Non-flammable<\/p>\n<\/li>\n Resistant up to about 1000 \u00b0C<\/p>\n<\/li>\n Sprayable<\/p>\n<\/li>\n Reduced workplace contamination<\/p>\n<\/li>\n<\/ul>\n Used for lubricating:<\/p>\n Plunger<\/p>\n<\/li>\n Sleeve<\/p>\n<\/li>\n Sliding injection surfaces<\/p>\n<\/li>\n<\/ul>\n Mineral oils<\/p>\n<\/li>\n Synthetic oils<\/p>\n<\/li>\n Water-based lubricants<\/p>\n<\/li>\n Dry lubricants (granules \/ pellets)<\/p>\n<\/li>\n<\/ul>\n Thermal stability<\/p>\n<\/li>\n Anti-wear (AW) properties<\/p>\n<\/li>\n Good air release<\/p>\n<\/li>\n Viscosity grades ISO VG 46\u201368<\/p>\n<\/li>\n Compatibility with moisture<\/p>\n<\/li>\n<\/ul>\n Mineral-based<\/p>\n<\/li>\n Synthetic<\/p>\n<\/li>\n Fire-resistant<\/p>\n<\/li>\n<\/ul>\n Important points:<\/p>\n 90-degree angle to the surface<\/p>\n<\/li>\n Accurate pressure<\/p>\n<\/li>\n Uniform spraying<\/p>\n<\/li>\n Compatibility with the die coat<\/p>\n<\/li>\n<\/ul>\n Mold lubricant<\/p>\n<\/li>\n Preparation of spray solutions<\/p>\n<\/li>\n Preventing excessive die heating<\/p>\n<\/li>\n<\/ul>\n Reducing friction<\/p>\n<\/li>\n Preventing sticking<\/p>\n<\/li>\n Increasing die life<\/p>\n<\/li>\n<\/ul>\n Used to remove hydrogen gas from the melt.<\/p>\n Result of use:<\/strong><\/p>\n Reduced porosity<\/p>\n<\/li>\n Increased strength<\/p>\n<\/li>\n Smoother surface of the part<\/p>\n<\/li>\n Prevention of internal cracking<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":" Part One \u2013 Forging Process (Industrial Forging) 1. Introduction to Forging: The Oldest and Most Powerful Metal Forming Method Forging, or industrial forging, is one of the most fundamental and robust methods of producing metal parts. In this process, unlike casting, the metal is not melted; instead, it is brought into its final shape by […]<\/p>\n","protected":false},"author":1,"featured_media":1744,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1743","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/posts\/1743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/comments?post=1743"}],"version-history":[{"count":1,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/posts\/1743\/revisions"}],"predecessor-version":[{"id":1745,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/posts\/1743\/revisions\/1745"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/media\/1744"}],"wp:attachment":[{"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/media?parent=1743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/categories?post=1743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ramansayyaliranian.com\/en\/wp-json\/wp\/v2\/tags?post=1743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
Large rings, massive shafts, power plant components, rolls, hammers.<\/p>\n
\n3.2 Closed-Die \/ Impression-Die Forging<\/h5>\n
\n
Gears, bushings, automotive fittings, aerospace components.<\/p>\n
\n3.3 Hot, Warm, and Cold Forging<\/h5>\n
The metal is heated to above its recrystallization temperature.
Suitable for hard alloys or large parts.<\/p>\n
Lower temperature than hot forging; lower energy consumption; better dimensional control.<\/p>\n
Performed without heating;
Advantages: very high accuracy, excellent surface finish.
Suitable for formable steels, tin, zinc.<\/p>\n
\n4. Advantages and Applications of Forging<\/h4>\n
4.1 Advantages<\/h5>\n
\n
4.2 Applications<\/h5>\n
\n
\n5. Critical Technical Considerations in Forging<\/h4>\n
\n
\n
\n6. Consumables and Lubricants Used in Forging<\/h4>\n
\n
\n7. Importance of Lubrication in Forging<\/h4>\n
\n
\nPart Two \u2013 Die Casting Process (High Pressure Die Casting \u2013 HPDC)<\/h3>\n
1. Introduction to Die Casting: Fast, Precise, and Industrial Production of Metal Parts<\/h4>\n
\n
\n2. Complete Step-by-Step Die Casting Process<\/h4>\n
2.1 Melting the Metal (Melting)<\/h5>\n
\n
\n2.2 Closing the Die (Die Locking)<\/h5>\n
\n
This locking must withstand a pressure of\u00a0700 to 1500 bar<\/strong>.<\/p>\n
\n2.3 Injection of Molten Metal (High Pressure Injection)<\/h5>\n
\n
\n
\n2.4 Cooling and Solidification<\/h5>\n
To control the temperature, usually:<\/p>\n\n
\n2.5 Opening the Die and Ejecting the Part (Ejection)<\/h5>\n
\n
\n2.6 Final Operations (Finishing)<\/h5>\n
\n
\n3. Types of Die Casting Machines<\/h4>\n
3.1 Hot Chamber Die Casting Machine (Hot Chamber)<\/h5>\n
\n
\n
\n3.2 Cold Chamber Die Casting Machine (Cold Chamber)<\/h5>\n
\n
\n
\n4. Advantages and Disadvantages of Die Casting<\/h4>\n
Advantages<\/h5>\n
\n
Disadvantages<\/h5>\n
\n
\n5. Key Lubricants and Consumables in Die Casting<\/h4>\n
Consumables include:<\/p>\n\n
\n6. Common Problems in Die Casting and Their Causes<\/h4>\n
\n\n
\n \nProblem<\/th>\n Cause<\/th>\n<\/tr>\n<\/thead>\n \n Porosity<\/td>\n Hydrogen gas, low temperature, incorrect injection speed<\/td>\n<\/tr>\n \n Die burnout<\/td>\n Poor temperature control, insufficient spraying<\/td>\n<\/tr>\n \n Sticking of metal to die<\/td>\n Inappropriate lubricant or incorrect concentration<\/td>\n<\/tr>\n \n Incomplete die filling<\/td>\n Low injection speed, low temperature<\/td>\n<\/tr>\n \n Chipping or cracking<\/td>\n Improper cooling, thermal shock to the die<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n7. Melt Cleaning and Refining Materials<\/h4>\n
\n
\n8. Role of the Operator and Process Control<\/h4>\n
\n
\n9. Quality Control in Die Casting<\/h4>\n
\n
\nPart Three \u2013 Extrusion Process (Extrusion)<\/h3>\n
1. Introduction: Continuous Forming for Profiles and Long Sections<\/h4>\n
Whatever shape the die opening has, the product will have the same shape along its entire length.<\/p>\n
\n2. Complete Extrusion Process Steps<\/h4>\n
2.1 Preparation of Raw Material<\/h5>\n
\n
\n
\n2.2 Forcing the Material Through the Die<\/h5>\n
\n
\n
\n2.3 Cooling and Shape Stabilization<\/h5>\n
\n
Prevent deformation and ensure dimensional stability.<\/p>\n
\n2.4 Cutting and Final Operations<\/h5>\n
\n
\n3. Types of Extrusion and Their Applications<\/h4>\n
\n\n
\n \nType<\/th>\n Description<\/th>\n Application<\/th>\n<\/tr>\n<\/thead>\n \n Direct<\/td>\n Billet and ram move in the same direction<\/td>\n Most common method<\/td>\n<\/tr>\n \n Indirect<\/td>\n Die moves; billet remains stationary<\/td>\n Lower force required, good for Al<\/td>\n<\/tr>\n \n Hot<\/td>\n Billet is hot<\/td>\n Aluminum, copper, mild steel<\/td>\n<\/tr>\n \n Cold<\/td>\n Performed at room temperature<\/td>\n High accuracy, steel parts<\/td>\n<\/tr>\n \n Continuous<\/td>\n Continuous flow of molten material<\/td>\n Pipes, cables, polymeric profiles<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n4. Advantages and Disadvantages of Extrusion<\/h4>\n
Advantages<\/h5>\n
\n
Disadvantages<\/h5>\n
\n
\n5. Lubricants and Consumables in Extrusion<\/h4>\n
\n
\n6. Industrial Applications of Extrusion<\/h4>\n
\n
\nPart Four \u2013 Ladle Coating \/ Refractory Coating<\/h3>\n
1. Definition of Ladle Coating<\/h4>\n
\n
\n2. Applications of Ladle Coating<\/h4>\n
2.1 Preventing Molten Metal from Sticking<\/h5>\n
2.2 Protection Against Thermal Shock<\/h5>\n
\n
2.3 Improving Melt Quality<\/h5>\n
2.4 Reducing Inclusions and Slag<\/h5>\n
\n3. Types of Ladle Coating<\/h4>\n
\n\n
\n \nType<\/th>\n Composition<\/th>\n Temperature Range<\/th>\n Application<\/th>\n<\/tr>\n<\/thead>\n \n Graphite-based<\/td>\n Graphite + water binder<\/td>\n Up to ~900 \u00b0C<\/td>\n Aluminum die casting<\/td>\n<\/tr>\n \n Zircon-based<\/td>\n ZrSiO\u2084<\/td>\n Up to ~1600 \u00b0C<\/td>\n Cast iron and steel<\/td>\n<\/tr>\n \n Alumina-based<\/td>\n Al\u2082O\u2083<\/td>\n Up to ~1700 \u00b0C<\/td>\n Steelmaking, heavy melts<\/td>\n<\/tr>\n \n BN-based<\/td>\n BN + alcohol binder<\/td>\n Up to ~1200 \u00b0C<\/td>\n Die casting dies, ladles etc.<\/td>\n<\/tr>\n \n Silica-based<\/td>\n SiO\u2082<\/td>\n Up to ~1200 \u00b0C<\/td>\n Non-ferrous alloys<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n4. Application Steps for Ladle Coating<\/h4>\n
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\n5. Important Points for Selecting a Coating<\/h4>\n
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\nPart Five \u2013 Coverall<\/h3>\n
1. What Is Coverall?<\/h4>\n
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\n2. Composition of Coverall<\/h4>\n
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\n3. Applications of Coverall<\/h4>\n
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\n \nFunction<\/th>\n Description<\/th>\n<\/tr>\n<\/thead>\n \n Surface coverage<\/td>\n Preventing oxidation<\/td>\n<\/tr>\n \n Inclusion collection<\/td>\n Combining with and collecting slag<\/td>\n<\/tr>\n \n Composition stability<\/td>\n Preventing evaporation of alloying elements<\/td>\n<\/tr>\n \n Gas reduction<\/td>\n Helping hydrogen removal<\/td>\n<\/tr>\n \n Quality improvement<\/td>\n Reducing shrinkage and porosity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n4. Types of Coverall<\/h4>\n
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\n5. Method of Use<\/h4>\n
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\nPart Six \u2013 Die Coat<\/h3>\n
Functions of Die Coat<\/h4>\n
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Types of Die Coat<\/h4>\n
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Method of Use<\/h4>\n
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\nPart Seven \u2013 Greases (High-Temperature, Silver, Black)<\/h3>\n
1. High-Temperature Grease<\/h4>\n
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\n2. Silver Grease<\/h4>\n
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\n3. Black Grease<\/h4>\n
Temperature resistance up to about 600 \u00b0C,
Anti-stick and anti-wear properties.<\/p>\n
\nPart Eight \u2013 Water-Based Graphite<\/h3>\n
Applications<\/h4>\n
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Features<\/h4>\n
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\nPart Nine \u2013 Plunger Oil<\/h3>\n
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Types<\/h4>\n
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\nPart Ten \u2013 Die Casting Hydraulic Oil<\/h3>\n
Features<\/h4>\n
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Types<\/h4>\n
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\nPart Eleven \u2013 Spray Gun<\/h3>\n
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\nPart Twelve \u2013 Granules in Die Casting and Forging<\/h3>\n
In Die Casting<\/h4>\n
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In Forging<\/h4>\n
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\nPart Thirteen \u2013 Degassing Tablets<\/h3>\n
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