变形温度对00Cr22Ni5Mo3N双相不锈钢组织及超塑性影响  

Effect of Deformation Temperature on the Microstructure and Superplasticity of 00Cr22Ni5Mo3N Duplex Stainless Steel

作　　者：李少峰[1,2] 任学平[1] 李殊霞[1] 陈京生[3] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]山西利民工业有限责任公司,山西太谷030812 [3]中国兵器工业标准化研究所,北京100089

出　　处：《兵工学报》2013年第11期1442-1447,共6页Acta Armamentarii

基　　金：教育部高等学校科技创新工程重大项目培育资金项目(201009);国家自然科学基金重点项目(51334006)

摘　　要：00Cr22Ni5Mo3N双相不锈钢经过固溶处理和冷轧变形后，在850～1000℃下保温5min进行恒温超塑性拉伸试验，研究变形温度对00Cr22Ni5Mo3N双相不锈钢超塑性的影响规律。观察各温度下变形前的组织，研究σ相及组织变化对材料超塑性能的影响，从微观上揭示变形温度影响材料超塑性的原因。试验结果表明：00Cr22Ni5Mo3N双相不锈钢经过1300℃固溶处理并85％冷轧变形，在850—1000℃下保温5min后，随着温度的升高，σ相数量越来越少，组织发生再结晶并形成均匀的等轴晶，而材料的延伸率从480％增大至1290％，变形过程中的峰值应力从125MPa降低至32MPa．After the solution treatment and cold rolling deformation of 00Cr22Ni5Mo3N duplex stainless steel, its super plastic deformation test is made at 850 - 1 000℃ for 5 minutes. The effect of deformation temperature on the superplasticity of 00Cr22Ni5Mo3N is studied. Its microstructure before deformation is observed, and the influence of sigma phase and microstructure changes on the superplasticity is researched. The reason why the deformation temperature affects the superplasticity of 00Cr22Ni5Mo3N is revealed. The results show that, when the deformation temperature changes, the microstructure and quantity of σ phase changes, and so does the superplasticity. After solution treatment at 1 300 ℃ , 85% of cold roiling deformation, and holding at 850 - 1 000 ℃ for 5 min, its microstructure is recrystallized, the uniform equiaxed grains become more and more with the increase in deformation temperature, and the number of sigma phase gets smaller. Meanwhile, the elongation of 00Cr22Ni5Mo3N duplex stainless steel increases from 480% to 1290% , and the peak stress decreases from 125 MPa to 32 MPa.

关 键 词：金属材料 双相不锈钢 超塑性 变形温度 Σ相 组织转变 

分 类 号：TG113.253[金属学及工艺—物理冶金]