热处理对C-276合金无缝管晶粒长大行为的影响

doi:10.13251/j.issn.0254-6051.2020.02.002

摘要/Abstract

摘要：

研究了不同的热处理工艺对C-276合金冷轧无缝管晶粒长大行为的影响。结果表明:在同一保温时间下,随热处理温度的升高,C-276合金的晶粒尺寸逐渐增大,且不同保温时间下的晶粒长大趋势相同。当热处理温度为1040～1080 ℃时,晶粒长大较快;在1080～1160 ℃时放缓;在1160～1200 ℃时又加快。在1040～1200 ℃下保温10 min后C-276合金的晶界迁移表观激活能为313.77 kJ/mol。当热处理温度为1040～1080 ℃时,随保温时间的延长晶粒长大较为缓慢;温度为1120～1160 ℃时,当保温时间在10 min内,晶粒长大较快,当保温时间大于10 min后晶粒长大减慢;温度升高到1200 ℃时,随保温时间的延长晶粒长大趋势较为平缓。热处理温度在1040～1200 ℃范围内,随温度的升高,C-276合金的晶粒长大动力学时间指数η先增大后减小。

关键词: 热处理, C-276合金, 晶粒长大, 激活能

Abstract:

Effect of different heat treatment processes on the grain growth behavior of cold rolled C-276 alloy seamless tubes was studied. The results show that the grain size of the alloy increases gradually with the increase of heat treatment temperatures at the same holding time, and the trend of grain growth is the same at different holding time. The grain growth is relatively rapid when the heat treatment temperature is 1040-1080 ℃, then slows down when the temperature is 1080-1160 ℃, and accelerates again in the range of 1160-1200 ℃. The apparent activation energy of the grain boundary migration of the C-276 alloy is 313.77 kJ/mol after holding at 1040-1200 ℃ for 10 min. When the heat treatment temperature is 1040 to 1080 ℃, the grain grows slowly with the increase of holding time. When the temperature is 1120 to 1160 ℃, the grain grows faster within 10 min, and slows down when more than 10 min. When the temperature rises to 1200 ℃, the grain growth trend is more gradual with the increase of holding time. The grain growth kinetics time index η of the C-276 alloy increases first and then decreases with the increase of temperatures in the range of 1040-1200 ℃.

Key words: heat treatment, C-276 alloy, grain growth, activation energy

中图分类号:

TG156.94

路言, 高佩. 热处理对C-276合金无缝管晶粒长大行为的影响[J]. 金属热处理, 2020, 45(2): 7-10.

Lu Yan, Gao Pei. Effect of heat treatment on grain growth behavior of C-276 alloy seamless tube[J]. HTM, 2020, 45(2): 7-10.

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