What is suitable for moulding steel

Answer:

Hot rolling die hammer forging, die forging, extrusion and die casting several main types, including hot forging die, press forging die, stamping die, hot extrusion die and metal die-casting mould and so on. The thermal deformation dies in the work, besides the mechanical stress, but also the effect of repeated heating and cooling, and causing great thermal stress. Hot-work die steel in addition to should have high hardness, strength and red hardness, abrasion resistance and toughness, but should also have good high temperature strength, thermal fatigue resistance, heat conductivity and corrosion resistance, and also has high hardenability, to ensure the mechanical properties of the whole section with a consistent. In the case of pressure casting, the surface layer should also be subjected to repeated heat and cooling without the crack, and the performance of the shock and erosion of the liquid metal flow. This kind of steel is generally belongs to the medium carbon alloy steel, carbon mass fraction was 0.30% ~ 0.60%, belong to hypoeutectoid steel, there is also a part of steel due to join more alloy elements, such as tungsten, molybdenum, vanadium, etc.) and become a eutectoid or hypereutectoid steel. The usual steel types are chromium manganese steel, chromium nickel steel, chrome tungsten steel etc.

Plastic moulds include thermoplastic moulds and thermosetting plastic moulds. The plastic mould requires certain strength, hardness, abrasion resistance, thermal stability and corrosion resistance. In addition, it also requires good manufacturability, such as heat treatment deformation is small, processing performance, corrosion resistance, good repair welding, grinding and polishing performance is good, good performance, high roughness, good thermal conductivity and working conditions have stable size and shape, etc. In general, the injection molding or extrusion die can be used for the heat making die steel. Hot solidification and the requirement of high wear-resisting and high strength mold can be used in cold making die steel.

Mold steel belongs to the special steel, it is the steel which makes the mould such as cold stamping die and hot forging mould. Molds are the main processing tools for manufacturing parts in industrial sectors such as machinery manufacturing, radio meters and electrical appliances. Steel mills make steel by adding special elements to steel. The mould steel can be divided into (cold making die steel), (heat making mould steel) and (plastic mould steel) 3 kinds, for forging, stamping, cutting, die-casting etc. Because of all sorts of mould USES different, complex working conditions, so the mold steel, according to the working conditions of mold manufacturing, should have high hardness, strength, wear resistance, enough toughness, and high hardenability, hardenability and other process performance. Because of the different kinds of USES, the working conditions are complex, so the performance requirements for the die steel are different.

Mould steel is used to make steel mould such as cold stamping die, hot forging die and die casting mould. Brief introduction: The mould steel can be divided into three categories: cold rolled mold steel, hot rolled mould steel and plastic mould steel, for forging, stamping, cutting, die-casting etc. Because of all sorts of mould USES different, complex working conditions, so the mold steel, according to the working conditions of mold manufacturing, should have high hardness, strength, wear resistance, enough toughness, and high hardenability, hardenability and other process performance. Because of the different kinds of USES, the working conditions are complex, so the performance requirements for the die steel are different.

Cold rolled molds include cold die, wire drawing die, drawing die, press die, thread rolling die, roller plate, cold press and cold extrusion die. Cold work die steel, according to the working conditions, and should have high hardness, strength, abrasion resistance and sufficient toughness, and high hardenability, hardenability and other process performance. Used for such purposes of alloy tool steel is generally belongs to the high carbon alloy steel, carbon mass fraction 0.80%, chromium is one of the important alloy elements such as steel, its mass fraction is usually not more than 5%. But for some high requirement of abrasion resistance, small deformation of mould steel after quenching, high chromium mass fraction is 13%, and in order to form a large number of carbide, carbon in steel quality score is high, up to 2.0% ~ 2.3%. The carbon content of the cold steel mold is high, and its organization is mostly in the form of a di-di-steel or lystenoid steel. Commonly used steel types have high carbon low alloy steel, high carbon high chromium steel, chrome molybdenum steel, medium carbon chromium tungsten steel, etc.