硼对奥氏体耐热钢TP347H热加工性、组织和力学性能的影响  

Effect of Boron on Hot Workability, Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H

作　　者：徐刚[1] 李钧[1] 肖学山[1] 倪建森[1] 朱长春[2] 赵钧良[2] 郑卫[2] 王治政[2] 

机构地区：[1]上海大学材料研究所,上海200072 [2]宝山钢铁股份有限公司特殊钢分公司,上海201900

出　　处：《特殊钢》2008年第2期23-25,共3页Special Steel

基　　金：上海市科委攻关基金(05DZ11003-2)

摘　　要：试验钢以超临界锅炉用奥氏体耐热钢TP347H(%:0.07C、17.98Cr、10.78Ni、0.70Nb、0.026 7N)为炉料,用25 kg真空感应炉在氩气保护下熔炼,并加入0～0.16%B。结果表明,当加B量≥0.02%时,试验钢奥氏体晶粒明显粗化,1200～950℃锻造时锻坯开裂。当加B量约0.01%时,奥氏体耐热钢TP347H具有最佳的综合性能:钢的室温抗拉强度为615 MPa;750℃,120 MPa钢的持久寿命为230 h,伸长率为42%。Test steels were melted by a 25 kg vacuum induction furnace in argon protective atmosphere with charging of austenite heat resistant steel TP347H （0.07C, 17.98Cr, 10. 78Ni, 0. 70Nb, 0. 026 7 N） for super critical pressure boiler and adding 0 ～0. 16% B. Results showed that as added ≥0. 02% B the austenite grain of test steel obviously coarsened and forging billet of steel cracked as forging at 1 200 ～950℃ ; as added about 0. 01% B the austenite heat resistance steel has optimum comprehensive properties i.e. tensile strength of steel at ambient was 615 MPa, the stress-rupture life and elongation of steel with 120 MPa at 750℃ were respectively 230 h and 42%.

关 键 词：奥氏体耐热钢TP347H 加硼 组织 性能 

分 类 号：TG142.13[一般工业技术—材料科学与工程]