Aluminum alloy die-casting die, die erosion (also known as cracking) was found at the beginning of production. Want to know the reason why hot work die steel is eroded and how to prevent it?

1、热作模具钢厂家解析热作模具钢被冲蚀的原因：

1. The hot work die steel manufacturer analyzes the reasons for the erosion of hot work die steel:

压铸模具作业过程中，热作模具钢不断地接受高速、高压喷发、金属的冲刷腐蚀和加热效果。因而热作模具钢，有必要具有杰出的抗热疲惫性、红硬性和抗高温液态金属的冲刷、腐蚀功能，而且应具有较好的工艺功能。热作模具钢被冲蚀的原因其实是，模具钢含有低熔点的杂质和非金属杂质。这些纤细分布于模具型腔的低熔点杂质，无法抵挡高压喷发金属的冲刷腐蚀和加热效果，而被熔化后掉落，在模具外表构成腐蚀麻点或纤细裂纹，构成冲腐蚀(又称：龟裂)。这些龟裂点渐渐展开，就会构成压铸模具开裂报废，缩短模具使用寿命。

In the process of heating and high-pressure die-casting, the metal will be continuously eroded during high-pressure die-casting. Therefore, it is necessary for hot working die steel to have excellent thermal fatigue resistance, red hardness, erosion and corrosion resistance of high-temperature liquid metal, and should have better process function. The reason why hot work die steel is eroded is that die steel contains impurities with low melting point and non-metallic impurities. These fine low melting point impurities distributed in the mold cavity can not resist the scouring corrosion and heating effect of high-pressure eruption metal, but fall after melting, forming corrosion pits or fine cracks on the surface of the mold, forming scouring corrosion (also known as cracking). These cracking points gradually expand, which will constitute the cracking and scrapping of die-casting die and shorten the service life of die.

2、热作模具钢被冲蚀的办法

2. Solution to erosion of hot work die steel

防止热作模具钢被冲蚀的有用办法是前进模具钢纯净度，下降或低熔点杂质。为了前进热作模具钢的使用寿命，往往挑选纯净度高、等向性好，通过炉外精炼，电渣重熔、多向铸造的高质量模具钢。同行为了下降本钱，选用废钢翻新替代合金炼钢,削减炼钢工艺，下降模具钢出产本钱。这些偷工减料、以次充好、的模具钢杂质多。而且杂质一旦存在就无法去除，只能稀释。但这些存在于模具钢内部的杂质，会引起热作模具钢被冲蚀。造成铝合金压铸模具在3000模次左右龟裂，模具2-3万模次开裂报废。

A useful way to prevent hot work die steel from being eroded is to advance the purity of die steel and reduce or solve the impurities with low melting point. In order to advance the service life of hot working die steel, high-quality die steel with high purity and good isotropy is often selected through out of furnace refining, electroslag remelting and multidirectional casting. In order to reduce the cost, peers choose scrap steel renovation to replace alloy steelmaking, reduce steelmaking process and reduce the production cost of die steel. These shoddy work and materials, shoddy mold steel and many impurities. Moreover, once impurities exist, they cannot be removed and can only be diluted. However, these impurities in the die steel will cause the hot work die steel to be eroded. The aluminum alloy die-casting die is cracked about 3000 times, and the die is cracked and scrapped for 20000-30000 times.

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