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.
作者
刘海定
王东哲
黄国平
黄敏
赵安中
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)
出处
《金属热处理》
CAS
CSCD
北大核心
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)
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
precipitation-strengthened Fe-Ni based alloy
hot extrusion heavy wall pipe
solution
aging
mechanical properties
