热处理对GH188合金板材组织及性能的影响
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摘要
通过对GH188合金冷轧板材进行1150～1180℃热处理,检验高温拉伸性能,同时对板材进行1170～1230℃的固溶处理,检验板面氧化(即晶间腐蚀)情况,结果表明,GH188合金冷轧板材性能随着热处理温度的升高,合金强度降低,塑性升高,当热处理温度达到1 180℃时,合金高温拉伸性能合格,不同温度晶间腐蚀结果表明,板面氧化层深度随着热处理温度的升高逐渐加重,当热处理温度升高至1190℃时,表面的氧化深度已经超过用户的使用要求,最终确定GH188合金的最佳热处理温度为1180℃。
The high temperature tensile property was tested after the cold rolled sheets of GH188 were heat between 1 150-1180℃,and the surface oxidation(intergranular corrosion)was tested after the sheet was solution treated between 1170-1230℃.Results showed that the strength decreased and the plasticity increased when the heat treatment temperature increased.When the heat treatment temperature reached 1180℃,the high temperature tensile property still conforms to specification requirement.The intergranular corrosion results showed that the surface oxidation becomes more serious when the heat treatment temperature increases.When the heat treatment temperature reaches 1190℃,the depth of surface oxidation cannot meet customer requirement.Finally it was confirmed that 1180℃ was the best heat treatment temperature for GH188.
The high temperature tensile property was tested after the cold rolled sheets of GH188 were heat between 1 150-1180℃,and the surface oxidation(intergranular corrosion)was tested after the sheet was solution treated between 1170-1230℃.Results showed that the strength decreased and the plasticity increased when the heat treatment temperature increased.When the heat treatment temperature reached 1180℃,the high temperature tensile property still conforms to specification requirement.The intergranular corrosion results showed that the surface oxidation becomes more serious when the heat treatment temperature increases.When the heat treatment temperature reaches 1190℃,the depth of surface oxidation cannot meet customer requirement.Finally it was confirmed that 1180℃ was the best heat treatment temperature for GH188.
引文
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[6]东赟鹏,王超渊,宋晓俊,等.GH5188合金流变行为研究[J].锻压技术,2013,38(6):116.
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[10]刘发信,袁文明.细晶晶粒度与力学性能的关系[J].材料工程,1996(9):25.
[2]杜丽卿.GH188合金的碳化物及其影[C].第八届全国高温合金年会学术论文特辑,乌鲁木齐,1995.
[3]曾炳胜,吴素琴,张素兰.碳和镧含量对钴基GH188合金组织和性能的影响[J].钢铁研究学报,1986,6(2):25.
[4]蒙肇斌,王志刚.钴基高温合金GH188中镧化物类型及元素Mg晶界偏聚的研究[J].钢铁研究学报,1999,11(3):30.
[5]曾炳胜,吴素琴,张素兰.镧在钴基超合金GH188中的作用及分配[J].中国稀土学报,1986,4(4):48.
[6]东赟鹏,王超渊,宋晓俊,等.GH5188合金流变行为研究[J].锻压技术,2013,38(6):116.
[7]《中国航空材料手册》编辑委员会.中国航空材料手册[M].2002.
[8]王中原,张伟强,信昕,等.GH188合金的微观组织和均匀化工艺[J].沈阳理工大学学报,2011,30(6):12.
[9]Boehlert C J,Longanbach S C,Bieler T R.Effect of thermomechanical processing on the creep behaviour of Udimet alloy 188[J].Philosophical Magazine,2008,88(5):641.
[10]刘发信,袁文明.细晶晶粒度与力学性能的关系[J].材料工程,1996(9):25.