Aluminum alloy die-casting mold, the beginning of production found that the die erosion (also known as: cracking), this is not the first time. Since the replacement of the supplier, the mold has not been produced, it was found that the mold was corroded in advance, even cracked and scrapped. Want to know the reason of hot work die steel being eroded and how to prevent it?

1、热作模具钢厂家出产的热作模具钢被冲蚀的原因：

1. The reasons for erosion of hot work die steel produced by hot work die steel manufacturer are as follows:

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。

In the process of die-casting die, hot working die steel is constantly subjected to high-speed, high-pressure eruption, metal erosion and heating effect. Therefore, it is necessary for hot work die steel to have excellent heat fatigue resistance, red hardness, erosion and corrosion resistance of high temperature liquid metal, and better process function.

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 fact, the reason of low melting point and non-metallic impurities in die steel is the erosion of die steel. These fine impurities with low melting point distributed in the mold cavity can not resist the erosion corrosion and heating effect of high-pressure eruption metal, but are melted and dropped, forming corrosion pits or fine cracks on the surface of the mold, forming erosion corrosion (also known as: cracking). These cracking points gradually spread out, will constitute the die casting die cracking scrap, shorten the service life of the 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。

A useful way to prevent erosion of hot work die steel is to improve the purity of die steel and reduce or eliminate impurities with low melting point. In order to improve the service life of hot work die steel, high-quality die steel with high purity, good isotropy, refining outside furnace, electroslag remelting and multi-directional casting is often selected. In order to reduce the cost, the peers choose scrap steel renovation to replace alloy steelmaking, reduce steelmaking process and reduce the production cost of die steel.

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。

These shoddy, shoddy, mold steel impurities. Moreover, once the impurities exist, they cannot be removed and can only be diluted. But these impurities in die steel will cause erosion of hot work die steel. The aluminum alloy die casting die cracked about 3000 times, and the die cracked about 20000-30000 times.