摘要
通过对2.25Cr1Mo、2.25Cr1Mo0.25V、2.25Cr1Mo0.3V3种不同类型的铬钼钢进行化学分析、冲击韧性试验和拉伸试验,就钒元素对压力容器用低合金铬钼钢的力学性能的影响进行了探讨.结果表明,铬钼钢中随着钒元素的加入和含量的增加,晶粒得到明显的细化,抗拉强度由570MP提高至620MP,伸长率由27%变为24%,冲击功由270J提升至330J,材料的强度和韧性得到明显提高,但是塑性随着钒元素的加入和含量增加而略有下降.试验结果为大型厚板压力容器的制造提供了参考依据.
For a study on the effects of vanadium on mechanical properties of low-alloy chrome molybde- num steel of pressure vessels, chemical analysis,impact toughness tests, and tensile tests were conducted of three different types of alloys：c：2.25CrlMo, 2.25CrlMo. 0.25V,and 2. 25Cr1Mo0. 3 Vhrome molybde- num steel. The result shows that with the addition of more vanadium into chrome molybdenum steel, the grain becomes more tiny,tensile strength increases from 570MP to 620MP,elongation drops from 27%0 to 24 %,and impact energy increases from 270J to 330J,and strength and toughness of material are both obvi- ously improved while ductility decreases to a small extent. Therefore,this experiment provides a theoretical foundation for the manufacturing of large thick plate pressure vessels.
出处
《甘肃科学学报》
2013年第4期42-45,共4页
Journal of Gansu Sciences
关键词
铬钼钢
钒元素
力学性能
压力容器
chrome molybdenum steels
vanadium
mechanical property
pressure vessels
