【摘要】 利用光学显微镜、扫描电镜、硬度计等研究了Si含量对潜孔钻头用钢22SiMnCrNi2Mo组织和性能的影响。实验结果表明:实验钢的强度、硬度在Si含量为1.20%到1.40%的范围内随Si含量的上升而增强,冲击韧性随Si含量的升高而下降,三种不同硅含量下的组织均为回火马氏体+少量的残余奥氏体,马氏体束尺寸随硅含量增加而减小。更多还原

【Abstract】 the effects of Si content on DTH bit affect the microstructure and properties of steel 22SiMnCrNi2 Mo by using optical microscope, scanning electron microscope, microhardness. The experimental results show that: strength,hardness of the steel in the Si content of 1.20% to increase with the Si content in the range of 1.40% and increase,increase the impact toughness decreases with Si ratio, three different silicon content organization for tempering martensite and a small amount of retained austenite, martensite beam size decreases the increase of silicon content.更多还原