PH13-8Mo不锈钢带状偏析及其在热处理中的演变  

Strip segregation in PH13-8Mo stainless steel and its evolution during heat treatment

作　　者：陈素明 岳珊 胡生双 赵虎 李毅 吴海峰 欧阳德来[2] Chen Suming;Yue Shan;Hu Shengshuang;Zhao Hu;Li Yi;Wu Haifeng;Ouyang Delai(AVIC Xian Aircraft Industry Group Co.,Ltd.,Xi'an Shaanxi 710089,China;School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang Jiangxi 330063,China)

机构地区：[1]中航西安飞机工业集团股份有限公司,陕西西安710089 [2]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《金属热处理》2024年第7期152-157,共6页Heat Treatment of Metals

基　　金：江西省自然科学基金(20224BAB204013)。

摘　　要：以某PH13-8Mo不锈钢轴零件为研究对象,研究了PH13-8Mo不锈钢带状偏析组织特征及其在固溶时效处理中的演变。结果表明,PH13-8Mo不锈钢中存在成分偏析带和δ铁素体偏析带两种类型带状偏析,成分偏析带呈平直连续状分布,δ铁素体偏析带呈平直不连续状分布。成分偏析带中Ni元素正偏析、Fe元素负偏析,Ni、Fe含量分别为11%和72%,分别低于和高于钢中Ni、Fe元素含量。δ铁素体偏析带中Ni、Fe含量分别为4%和71%,均低于钢中Ni、Fe平均含量;Cr、Mo、Al含量分别为17%、4.5%和1.84%,均高于钢中Cr、Mo、Al平均含量。1100℃×2 h固溶+540℃×4 h时效可有效消除PH13-8Mo不锈钢成分偏析带,但对δ铁素体偏析带消除作用影响不明显。Taking a PH13-8Mo stainless steel shaft part as the research object,the microstructure characteristics of strip segregation in the PH13-8Mo stainless steel and its evolution during solution treatment and aging were studied.The results show that there exist two types of strip segregation in the microstructure of the steel,namely component segregation strip and δ-ferrite segregation strip.The component segregation strip distributes in a straight and continuous pattern,but the δ-ferrite segregation strip distributes in a straight and discontinuous pattern.In the component segregation strip with positive segregation of Ni and negative segregation of Fe,the content of Ni and Fe is 11%and 72%,respectively,lower and higher than the content of Ni and Fe elements in the steel.In the δ-ferrite segregation strip,the content of Ni and Fe is 4% and 71%,respectively,which are lower than the average content of Ni and Fe in the steel,the content of Cr,Mo and Al is 17%,4.5% and 1.84%,respectively,which are higher than the average content of Cr,Mo and Al in the steel.The component segregation strip in the PH13-8Mo stainless steel can be effectively eliminated by solution treatment at 1100℃ for 2 h and then aging at 540℃ for 4 h,but theδ-ferrite segregation strip can not be effectively eliminated.

关 键 词：PH13-8Mo不锈钢 带状偏析 固溶时效 

分 类 号：TG142.1[一般工业技术—材料科学与工程]