一、前言根据鞍标73—57的规定,φ9毫米硬线的脱碳总深度不得超过其公称直径的2%,即0.18毫米。按此标准检查,硬线脱碳废品率是很高的(见表1)。1964年10月,钢铁研究所组织了一个技术工作组,通过三结合的形式与工人密切结合,共同进行了试验研究。经过反复实践,摸索出一套氧化火烧钢操作方法。几个月的生产实践证明(表2),这个方法是行之有效的。整个试验过程是不断发现、总结、推广工 I. Preface According to the provisions of the saddle 73-57, φ9 mm hard-line total decarburization depth shall not exceed 2% of its nominal diameter, that is 0.18 mm. According to this standard inspection, hard-line decarburization rejection rate is very high (see Table 1). In October 1964, the Iron and Steel Institute organized a technical working group to carry out pilot studies jointly with workers in a three-pronged approach. After repeated practice, worked out a set of oxidized fire-retardant steel operation method. A few months of production proved (Table 2), this method is effective. The entire test process is to constantly find, summarize and promote workers