【作者】 金宝士； 黄志求； 李照欣；

【Author】 JIN Bao-Shi , HUANG Zhi-Qiu, Jiamusi University, 154007, China

【机构】 佳木斯大学材料科学与工程学院； 山东省日照港务局；

【摘要】 本文探讨了等温淬火工艺对低碳低合金CrMnSi铸钢的力学性能的影响。结果表明,合适的等温淬火工艺,可获得一定数量的贝氏体和残余奥氏体的复合组织,冲击断口形貌由解理刻面变为韧窝状,铸造成型无缺口试样(10×10×55mm)的冲击韧性由ak≤30J/cm2增加至ak≥170J/cm2,具有较高的硬度和冲击韧性的配合,硬度HRC≥40。更多还原

【Abstract】 This work examined the influence of isothermal quenching process of low-alloy, low carbon (LALC) CrMnSi cast steel on mechanical property. The results showed that the duplex microstructure consisting of Bainite and residual Austenite can be obtained through the optimum isothermal quenching, the fractographies of specimens changed from cleavage facets to dimple with impact toughness increasing, the impact toughness increased from 30J/㎝2 to 170J/cm2, and hardness is greater than 40(HRC).更多还原