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一、前言近年来,我国热处理工人及技术人员高举毛泽东想想伟大红旗,走我国自己工业发展的道路,在氮化生产及试验研究方面都取得了很大的成绩。随着氮化工艺日益广泛的运用,也对我们检查工作提出了愈来愈高的要求。汽轮机氮化零件(如调节阀、套筒、阀杆等)是在高温、高压的条件下工作的。对材料本身要求有一定的机械强度、塑性和冲击韧性。要求长期在高温条件下工作仍然具有较高的表面硬度。
I. Introduction In recent years, our country’s heat treatment workers and technicians have exalted Mao Zedong’s thought of a great red flag and taking the road of China’s own industrial development. Great achievements have been made in nitrogen production and experimental research. With the increasingly widespread use of nitriding process, but also to our inspection put forward higher and higher requirements. Nitrogen gas turbine parts (such as control valves, bushings, stems, etc.) are working under high temperature and pressure conditions. The material itself requires a certain degree of mechanical strength, plasticity and impact toughness. Requires long-term work in high temperature conditions still have a high surface hardness.