含硅低合金高强度贝氏体钢的环境断裂敏感性  

Environmental Fracture Sensitivity of Low Alloy High-strength Bainitic Steels Containing Silicon

作　　者：江波[1] 陈刚[1] 刘芬斌[2] 任学冲[1,3] 褚武扬[2] 

机构地区：[1]马鞍山钢铁股份有限公司技术中心,马鞍山243000 [2]北京科技大学腐蚀与防护中心,北京100083 [3]北京科技大学材料服役安全科学中心,北京100083

出　　处：《腐蚀与防护》2010年第9期665-669,共5页Corrosion & Protection

基　　金：国家自然科学基金资助项目(No.50901010);中国博士后科学基金资助项目(No.20080430309)

摘　　要：为研究新型高强度贝氏体钢的环境适应性,测试了两种不同含碳量的含硅高强度贝氏体钢的力学性能和环境断裂敏感性。结果表明,强度(含碳量)对贝氏体钢的环境断裂敏感性具有明显的影响,高含碳量贝氏体钢(HC)(C0.88%,σy=1818 MPa)试样的环境断裂敏感性明显高于低含碳量贝氏体钢(LC)(C0.33%,σy=1310 MPa),HC钢性能较同强度级别马氏体时效钢T250为差,而LC钢性能相当于相同强度级别的30Cr MnSi Ni2A钢。To investigate the environmental adaptability of two bainitic steels contained silicon, the mechanica properties and environmental fracture sensitivity of the two steels with different carbon contents were tested. The results showed that the environmental fracture sensitivity of the bainitic steels was affected by the strength （the carbon content） of the steels obviously. The environmental fracture sensitivity of the steel with high carbon conten （HC）（C 0. 88%, σy=1818 MPa） was much higher than that with low carbon content（HL）（C 0. 33%, σy= 131C MPa）. The environmental fracture sensitivity of the HC steel was higher than that of the T250 maraging steel at th, same strength level. And the environmental fracture sensitivity of the LC steel was equivalent to that of th, 30CrMnSiNi2A steel at the same strength level.

关 键 词：贝氏体钢 力学性能 环境断裂 

分 类 号：TG174.21[金属学及工艺—金属表面处理] TG111.91[金属学及工艺—金属学]