根据引进美国P&H公司挖掘机制造技术,探讨了大型挖掘机零件热处理技术要求的规律性。给出了常用的调质硬度范围,普碳素钢4档,合金钢8档;按模数大小规定了不同钢种的表面淬火硬度以及关于渗碳层深度和相啮合齿轮的硬度匹配。 According to the introduction of American P&H excavator manufacturing technology, the regularity of the heat treatment technical requirements for large excavator parts was discussed. The commonly used range of quenched and tempered hardness is given. There are 4 grades of plain carbon steel and 8 grades of alloy steel. The surface hardness of different steel grades and the hardness matching of the depth of the carburized layer and the meshing gears are stipulated according to the module size.