热处理对沉淀强化型铁镍基耐蚀合金热挤压厚壁管力学性能的影响  

Influence of heat treatment on mechanical properties of precipitation strengthened Fe-Ni based corrosion-resistant alloy hot extrusion heavy wall pipe

作　　者：刘海定[1,2,3] 王东哲[1,2,3] 黄国平[1] 黄敏[1,2] 赵安中[1,2,3] Liu Haiding Wang Dongzhe Huang Guoping Huang Min Zhao Anzhong(Chongqing Materials Researeh Institute Co. , Ltd. , Chongqing 400707, China Chongqing Key Laboratory of Corrosion-resistant Alloys, Chongqing 400707, China National Engineering Research Center for Instrument Functional Materials, Chongqing 400707, China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]耐腐蚀合金重庆市重点实验室,重庆400707 [3]国家仪表功能材料工程技术研究中心,重庆400707

出　　处：《金属热处理》2016年第12期153-157,共5页Heat Treatment of Metals

基　　金：国家高技术研究发展计划(863计划)(2013AA031005)

摘　　要：研究了热处理工艺对铁镍基合金热挤压厚壁管力学性能的影响。结果表明：由于挤压温度高、速度快,且挤压完成后采用了水冷冷却,试验合金挤压态的力学性能和固溶态的力学性能非常接近,挤压后直接时效态和固溶＋时效态合金的力学性能也非常接近。随着固溶温度升高,试验合金的强度下降、韧塑性上升,适宜的固溶处理温度是960~1040℃。随着时效温度的升高,试验合金的强度呈现先升高后降低的趋势,而韧塑性表现出大致相反的变化规律,其转折点温度均为740℃。随着时效时间的延长,试验合金的强度呈现先急剧增大后缓慢增加再后几乎不变的趋势,而韧塑性表现出大致相反的变化规律,适宜的时效时间为不超过16 h。Effect of heat treatment on mechanical properties of Fe-Ni based corrosion-resistant alloy hot extrusion heavy wall pipe. The test results show that, as the high extrusion temperature, fast extrusion speed and water cooling after extrusion, the extruded alloy has a similar mechanical properties with solutioned alloy, and the mechanical properties of the direct aged and solid solutioned ＋ aged alloys are also very close. With solution temperature increasing, the strength of the alloy decreases, however, the toughness increases, the optimum solution temperature is in the range of 960-1040 ℃. With aging temperature increasing, the strength of the alloy increases at first and then decreases, while the toughness shows a roughly opposite change law, the turning point temperature are all 740 ℃. With aging time prolonging, the strength of the alloy increases sharply at first, and then turns gradually until reaches the maximum value, finally remains unchanged, while the toughness shows a reversed trend compared with the strength. The suggested aging time should not exceed 16 h.

关 键 词：沉淀强化型铁镍基合金 热挤压厚壁管 固溶处理 时效处理 力学性能 

分 类 号：TG162.84[金属学及工艺—热处理]