摘要
通过金相显微镜、SEM、TEM等设备研究了固溶处理条件下不同氮含量(0、0.095%、0.14%、0.21%,质量分数,下同)对第3代核电主管道用316L不锈钢显微组织及室温力学性能的影响。结果表明,氮的加入可细化316L不锈钢晶粒尺寸,且含氮0.095%时对晶粒细化作用最显著,氮作为合金元素能够抑制316L不锈钢组织中σ、χ相的析出,并提高316L不锈钢的强度、硬度,降低断后伸长率,但对颈缩率影响不显著,当氮含量为0.14%时,试验钢具有最佳的韧性。
The effect of nitrogen content （0, 0. 095 %, 0.14 %, 0.21%） on microstructure and mechanical proper- ties of 316L stainless steel used in the third generation of nuclear power main pipe was investigated by metallurgi- cal microscope, SEM, TEM, etc. The results show that the grain size of 316L stainless steel can be refined with the addition of nitrogen, especially when the nitrogen content is 0. 095 % nitrogen alloying can suppress the precip- itation of a and X phase, and improve the strength, hardness of the 316L stainless steel, and reduce the elongation to fracture, hut addition of nitrogen have unapparent impact on the necking rate of the 316L stainless steel, when the nitrogen content is 0.14%, the tested steel is of best toughness.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2013年第10期36-41,46,共7页
Journal of Iron and Steel Research
关键词
晶粒尺寸
析出相
力学性能
grain size
precipitation
mechanical property
