论文部分内容阅读
本文利用电解分离化学相分析的手段对比研究了30CrNi2MoVA钢经常规淬火和高温锻造形变淬火状态的碳化物析出类型、数量及规律。对淬火样和回火样分别用1％氯化锂+4％磺基水杨酸+5％甘油-甲醇电解液和7.5％的氯化钾+0.5％柠檬酸-水电解液提取碳化物,X光衍射作结构分析,化学法做定量分析。文中列出了两张X衍射图和两个数据表。实验结果证明了钢在奥氏体形变过程中确实存在着碳化物析出,对含钒的30CrNi2MoVA钢形变淬火析出的碳化物为VC。同时说明了钢经高温锻造形变淬火后促进了回火碳化物的析出,形变回火析出的VC比常规淬火后回火析出的VC数量多、颗粒小、弥散度大。
In this paper, the type, quantity and regularity of carbide precipitation of 30CrNi2MoVA steel by conventional quenching and high temperature forging deformation and quenching were comparatively studied by means of electrolytic phase separation chemical phase analysis. The samples were hardened and tempered respectively with 1% lithium chloride + 4% sulfosalicylic acid + 5% glycerol - methanol electrolyte and 7.5% potassium chloride + 0.5% citric acid - X-ray diffraction for structural analysis, chemical method to do quantitative analysis. The article lists two X-ray diffraction charts and two datasheets. The experimental results show that the precipitation of carbides does exist during the deformation of austenite, and the carbide precipitated from the deformation of 30CrNi2MoVA steel containing vanadium is VC. At the same time, it is demonstrated that the precipitation of tempering carbides is accelerated after deformation and quenching of steel by high temperature forging. The amount of VC precipitated by deformation and tempering is more than that of conventional quenching and tempering, and the particles are small and the dispersion is large.