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- 齐全
Introduction
Mold steel is a medium alloy hot work mold steel containing silicon, chromium, molybdenum and vanadium. After quenching and tempering treatment, it obtains a martensitic structure with fine structure and moderate grains. Basically There are fine carbonized materials distributed on it, which has good comprehensive mechanical properties and good hardenability. It is more suitable for manufacturing molds with large sizes and complex shapes.
Characteristics
, good high temperature strength and toughness, good wear resistance, easy to cut
, is a kind of hot mold steel with good balance of strength, toughness and heat resistance. In recent years With the development of isotropic products, they are increasingly moving toward high toughness and other aspects. It can make the mold have longer life, more stable performance, easy processing, and small heat treatment deformation.
Application
It is the most widely used mold material for aluminum and zinc die-casting. This steel is a high-temperature resistant high-grade alloy steel containing tungsten. It is suitable for hot working, aluminum, magnesium, zinc, and copper alloy die-casting molds. , grooving knives, scissors and hot forging actions, plastic molds, hot work reamers, rolling knives, general hot work forging dies, hot bolt dies, various hot room tools, etc.
Chemical composition
Main ingredients %
Carbon
Silicon.
Manganese.
Chromium
Molybdenum.
Nickel
Vanadium.
Delivery status and hardness Annealed status, hardness.
Physical Properties
Hardness
Before heat treatment it is about ~ (~)
After heat treatment the hardness inside ~ surface
The density is. per cubic centimeter
Heat treatment< br/> Quenching
First stage preheating ~ ℃
Second stage preheating ~ ℃
Blowing cooling or high pressure gas cooling, etc., ~ ℃ into the tempering furnace.
Tempering
Preheating ~ ℃
Tempering heating ~ ℃
Cool the air to room temperature and temper three times. The quenching temperature is ~°C, the hardness is ~°C, the heat treatment deformation is small, and the surface can be nitrided and nitrided to make the processed products have better wear resistance.
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