一、结构钢淬火时出现的疵病及对策 (一)淬火硬度不足及硬度不匀 1.现象——结构钢淬火后整体都达不到所规定的硬度值,叫做“淬火硬度不足”;如果淬火后部分硬度不足、产生软点,零件表面硬度不均分,叫做“硬度不匀”。 2.产生原因及其对策 (1)原因——被处理材料在淬火前有氧化皮或脱碳层。 First, the structural steel quenching flaws and Countermeasures (A) the lack of quenching hardness and uneven hardness 1. Phenomenon - the structural steel after quenching the whole reach the required hardness value, called “quenching hardness”; if Quenched part of the lack of hardness, resulting in soft spots, uneven surface hardness of parts, called “uneven hardness.” 2. Causes and Countermeasures (1) The reason - the material being processed before quenching oxide layer or decarburization.