Mold heat treatment includes mold material heat treatment and mold parts heat treatment.

模具材料熱處理：在鋼廠內完成，保證鋼材質量，如基本力學性能，金相組織要符合標準或行業標準。特點是大型工業爐中大批量生產。

Heat treatment of die materials: it shall be completed in the steel plant to ensure the quality of steel, such as basic mechanical properties and metallographic structure, which shall comply with national standards or industrial standards. It is characterized by mass production in large industrial furnaces.

模具零件熱處理：在模具制造廠完成，或熱處理廠完成。特點是小批量或單件生產，工藝復雜多樣，設備精良。

Heat treatment of mold parts: completed in the mold manufacturer or professional heat treatment plant. It is characterized by small batch or single piece production, complex and diverse processes and sophisticated equipment.

熱處理工藝方法，分預備熱處理和終熱處理。常用方法有：正火、退火、淬火、調質、滲碳及氮化等，見表。

Heat treatment process includes preliminary heat treatment and final heat treatment. Common methods include normalizing, annealing, quenching, quenching and tempering, carburizing and nitriding, as shown in the table.

熱作模具鋼的熱處理

Heat treatment of hot working die steel

易切削預硬化型熱作模具鋼的熱處理

Heat treatment of free cutting pre hardening hot working die steel

非合金中碳熱作模具鋼的熱處理

Heat treatment of non alloy medium carbon hot working die steel

滲C型熱作模具鋼的熱處理

Heat treatment of C-type hot working die steel

耐腐蝕型熱作模具鋼的熱處理

Heat treatment of corrosion resistant hot working die steel

時效硬化熱作模具鋼的熱處理

Heat treatment of age hardening hot working die steel

熱作模具鋼常采用哪些熱處理工藝

What heat treatment processes are often used for hot work die steel

熱作模具材料的性能對模具壽命有決定性的影響，根據模具的結構和使用情況，合理選用制模材料是模具工程師的重要任務之一。模具熱處理及表面強化是模具制造中的關鍵工藝，是保證模具質量和使用壽命的重要環節，實際使用證明，在模具失效中由于熱處理不當引起的占很大比例。

The performance of hot working die materials has a decisive impact on the die life. According to the structure and use of the die, it is one of the important tasks for die engineers to reasonably select the die materials. Mold heat treatment and surface strengthening are key processes in mold manufacturing and important links to ensure mold quality and service life. The actual use has proved that improper heat treatment accounts for a large proportion of mold failure.

熱作模具用途廣泛，工作條件差別大，制造模具的材料范圍很廣。目前，沖壓模、塑料模、壓鑄模、粉末冶金模的材料以鋼為主，有些模具還可采用低熔點合金和非金屬材料等。

Hot working dies have a wide range of uses and working conditions, and a wide range of materials for manufacturing dies. At present, the materials of stamping die, plastic die, die-casting die and powder metallurgy die are mainly steel. Some dies can also use low melting point alloys and non-metallic materials.

熱作模具鋼是制造熱作模具(熱鍛模、熱頂鍛模、熱擠壓模和壓鑄模等)的金屬材料。該類模具在工作時與熱金屬接觸，模腔表面會受熱升溫300～400℃(熱鍛模)、500～800℃(熱擠壓模)，甚高達1000℃左右(壓鑄模)。由于熱作模具工況條件非常惡劣，是在非?？量痰臈l件下工作的，如承受各種應力及金屬熔液對模具工作表面的溶蝕，在工作中反復受到熾熱金屬的加熱和冷卻介質(水、油、空氣)冷卻的熱循環交替作用。當熾熱的金屬放入熱作模具型腔時，型腔表面急劇升溫，表層產生壓應力和壓應變；當金屬件取出時，型腔表面由于急劇降溫而受到拉應力和拉應變作用，非常容易產生熱疲勞等，因此要求模具材料具有高的熱強度、高溫硬度、沖擊韌性、淬透性和好的熱穩定性和抗冷熱疲勞性能等。總之，要求熱作模具有良好的綜合力學性能。

Hot work die steel is the metal material for manufacturing hot work dies (hot forging die, hot top forging die, hot extrusion die, die casting die, etc.). When this kind of die is in contact with hot metal during operation, the surface of the die cavity will be heated to 300 ~ 400 ℃ (hot forging die), 500 ~ 800 ℃ (hot extrusion die), or even up to about 1000 ℃ (die casting die). Because the working conditions of the hot working die are very bad, it works under very harsh conditions, such as bearing various stresses and the corrosion of the metal melt on the working surface of the die. In the work, it is repeatedly heated by the hot metal and cooled by the cooling medium (water, oil and air). When the hot metal is put into the cavity of the hot working die, the surface of the cavity rises sharply, resulting in compressive stress and strain; When the metal parts are taken out, the cavity surface is subject to tensile stress and strain due to rapid cooling, which is very easy to produce thermal fatigue. Therefore, the mold material is required to have high thermal strength, high temperature hardness, impact toughness, hardenability, good thermal stability and cold and thermal fatigue resistance. In a word, the hot working die is required to have good comprehensive mechanical properties.

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