节镍奥氏体不锈钢凝固模式及氮的影响  

Solidificatin mode of low Ni-containing austenitic stainless steel and effect of nitrogen

作　　者：刘国平[1] 

机构地区：[1]酒泉钢铁(集团)有限责任公司不锈钢厂,甘肃嘉峪关735100

出　　处：《炼钢》2009年第3期60-63,共4页Steelmaking

摘　　要：选取氮含量不同的连铸板坯试样,利用THERMORESTOR-W型焊接热模拟机对试样局部加热熔化,令其在设定的冷却温度范围以特定的速度冷却,研究氮含量对节镍奥氏体不锈钢初凝组织的影响。试验结果表明:由于氮含量的差异,低氮钢式样(1号)与高氮钢式样(2号)的凝固模式不同,且它们随着冷却速度的增加,铁素体及晶粒内部沉淀相的含量变化趋势存在明显的差别。The effect of Na content on the initial solidification structure of low Ni-containing austenitic stainless steel was studied by choosing different N2 content slab sample, reheating and melting a partial of the sample in a THERMORESTOR-W type welding simulation machine, and then quickly cooling it down with a specific cooling speed within a set cooling temperature range. The results show that the solidification mode of sample 1 with lower N2 content was different from sample 2 which has higher N2 content, and significant difference of the trend of change in the ferrite and precipitation phase content inside the crystal between them appeared as their cooling speed increased.

关 键 词：节镍奥氏体不锈钢 凝固模式 氮含量的影响 

分 类 号：TF764.1[冶金工程—钢铁冶金]