一、前言18Cr2Ni4WA 钢是国防工业及民用工业中应用较为广泛的低碳合金钢。过去较多地是进行渗碳淬火和低温回火处理来制造承受重负荷、要求耐磨的零件。近年来也作整体淬火后进行不同温度回火处理后使用。其优良的强韧特性是合金结耕钢无法与之相比的。本文对淬火和不同温度回火后的18Cr2Ni4WA 钢进行单向拉伸测定其发生颈缩前的形 First, the preface 18Cr2Ni4WA steel is a national defense industry and civilian industry in the more widely used low-carbon alloy steel. In the past is more carburizing and low temperature tempering to create heavy-duty, wear-resistant parts. In recent years for the overall quenching after tempering at different temperatures to use. Its excellent toughness is that alloyed steel can not be compared with it. In this paper, after quenching and tempering at different temperatures 18Cr2Ni4WA steel uniaxial tensile test before the occurrence of its neck shape