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细牙螺丝热处理后经检测发现,常出现心部硬度不足现象。通过对成分和心部组织结构的分析得出,材料及热处理工艺参数是造成心部硬度不足的主要因素,在调整原材料和改进热处理工艺参数后,经过热处理实验表明,产品符合要求。
Fine teeth screw heat treatment after testing found that the heart often appear insufficient hardness phenomenon. Through the analysis of the composition of the heart and the core structure, the material and the parameters of the heat treatment process are the main factors that cause the hardness of the heart. After the raw materials are adjusted and the parameters of the heat treatment are improved, the heat treatment experiments show that the products meet the requirements.