40CrNi2Mo钢的低温力学性能
Mechanical Properties of 40CrNi2Mo Steel at Low Temperatures
摘 要
采用低温拉伸试验与系列冲击试验对调质态40CrNi2Mo钢的低温(室温~-150 ℃)力学性能进行了研究.结果表明:该钢屈服强度和抗拉强度随温度的降低而升高,断面收缩率、伸长率随温度的降低而减小,并且它们与温度均呈线性关系;求出了该钢屈服强度与抗拉强度随温度变化的关系式;根据绘制出的冲击功曲线,根据综合能量法及断口形貌可确定其韧脆转变温度为-125 ℃.
韧脆转变温度
力学性能
low temperature
ductile-brittle transition temperature
mechanical property
Abstract
The mechanical properties at low temperatures (room temperature--150 ℃) of the 40CrNi2Mo steel at quenched and tempered state were investigated by using low temperature tensile tests and series impact tests.The results indicate that the yield strength and tensile strength of the steel elevated with the reducing temperature,while the reduction of area and elongation reduced,the above properties and temperature had a linear relationship.The formula of the yield strength and the tensile strength as well as the temperature was obtained for the 40CrNi2Mo steel. According to the drawn impact energy curve,comprehensive energy method and the fracture surface morphology,its ductile-brittle transition temperature could be determined,which was -125 ℃.
中图分类号 TG142.1
所属栏目 材料性能及其应用
基金项目
收稿日期 2009/10/5
修改稿日期 2010/6/26
网络出版日期
作者单位点击查看
备注张世英(1983-),男,辽宁沈阳人,硕士研究生.
引用该论文: ZHANG Shi-ying,GUO Jin,ZHANG Wei-qiang. Mechanical Properties of 40CrNi2Mo Steel at Low Temperatures[J]. Materials for mechancial engineering, 2010, 34(11): 79～92
张世英,郭金,张伟强. 40CrNi2Mo钢的低温力学性能[J]. 机械工程材料, 2010, 34(11): 79～92
被引情况:
【1】李玉坤,尤泽广,肖铭,邹雪飞, "天然气分输减压阀阀体用铸钢的低温力学性能",机械工程材料 40, 56-61(2016)
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【3】宋庆阳,胥永顺.AISI 4340力学性能综合分析[J].矿山机械,2005(4):77-78.
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【5】王元清,王晓哲,武延民.结构钢材低温主要力学性能指标的试验研究[J].工业建筑,2001(12):63-65.
【6】王晓哲,王元清,石永久.低温对桥梁钢材主要力学性能影响的试验研究[J].低温建筑技术,2003(5):1-3.
【7】奚望,王元清,石永久.钢轨钢材低温力学性能的试验研究[J].铁道工程学报,2006(8):28-29.
【8】陈国庆.电力机车常用材料低温机械性能分析[J].电力机车与城轨车辆,2004(2):38-39.
【9】束得林.工程材料力学性能[M].北京:机械工业出版社,2003:70-71.
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