硅对9Cr-1.5WVTa低活化马氏体钢力学性能的影响  

Effect of Silicon on Mechanical Properties of 9Cr-1.5WVTa Low Activation Martensitic Steel

作　　者：何西扣[1] 万发荣[2] 朱衍勇[1,2] 乔建生[2] 

机构地区：[1]钢铁研究总院,北京100081 [2]北京科技大学材料物理与化学系,北京100083

出　　处：《原子能科学技术》2010年第12期1482-1486,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(50771017);国家重点基础研究发展计划资助项目(2008CB717802)

摘　　要：基于中国正在研究的聚变堆用9Cr-1.5WVTa低活化马氏体钢(CLAM钢),研究了添加合金元素硅对CLAM钢力学性能的影响。结果表明,添加0.2%Si使得CLAM钢的抗拉强度和屈服强度明显提高,钢的塑性和冲击韧性同时也得到一定提高,其中,韧脆转变温度(DBTT)由-13℃降至-30℃。未添加和添加0.29%Si的CLAM钢均为全马氏体组织,无δ铁素体存在。硅的添加使得9Cr-1.5WVTaSi钢的晶粒细化,从而提高了钢的拉伸和冲击性能。Based on the new Chinese low activation martensitic（CLAM）steel being developed as for fusion reactors,the effect of silicon adding on the mechanical properties of 9Cr-1.5WVTa steels was investigated.The results show that adding 0.2% silicon leads to higher tensile strength,and more excellent plasticity and impact toughness.The ductile-brittle transition temperature（DBTT）is decreased from-13 ℃ to-30 ℃.The 9Cr-1.5WVTaSi steel has a smaller prior-austenite grain size,but microstructures are similar,both fully martensitic steels free of δ-ferrite.It was summarized that the improved tensile and impact properties of the 9Cr-1.5WVTaSi steel were attributed to adding 0.2% silicon,refined the prior-austenite grain size.

关 键 词：硅 低活化马氏体钢9Cr-1.5WVTa 力学性能 聚变堆 

分 类 号：TL627[核科学技术—核技术及应用]