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对用于制作高压开关构件的45钢进行了3 h盐浴氮碳共渗,抛光后再进行400℃×30 min氧化的QPQ处理。通过观察渗层表面形貌,测量渗层表面硬度及耐磨性,分析了渗层性能与QPQ工艺之间关系。研究结果表明,45号钢在不同QPQ氮碳共渗温度下得到了不同厚度的化合物层,具有很高的硬度和耐磨性。当620℃氮碳共渗时,氮碳共渗层的综合性能最佳。
The 45 steel used for making high-voltage switchgear was subjected to 3 h salt bath nitrocarburizing, followed by QPQ oxidation at 400 ℃ for 30 min. By observing the surface morphology of the infiltrated layer and measuring the surface hardness and wear resistance of the infiltrated layer, the relationship between the performance of the infiltrated layer and the QPQ process was analyzed. The results show that steel 45 has different thickness of compound layer at different QPQ nitrocarburizing temperatures, and has high hardness and wear resistance. When 620 ℃ nitrocarburizing, nitrocarburizing layer of the best overall performance.