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ZL205A合金块状偏析相缺陷的研究
Study on Blocky-shaped Segregation Phase of ZL205A Alloy
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- DOI:
- 作者:
- 郭凡 贤福超 张海涛 姜枫 王淑青 肖抓 卢鹤
GUO Fan;XIAN Fuchao;ZHANG Haitao;JIANG Feng;WANG Shuqing;XIAO Zhua;LU He
- 作者单位:
- 首都航天机械有限公司
Capital Aerospace Machinery Company,Beijing 100076,China
- 关键词:
- ZL205A 块状偏析 超声波 显微硬度 时效处理
ZL205A block segregation ultrasonic melt treatment microhardness aging treatment
- 摘要:
- 以ZL205A合金铸件块状偏析缺陷为研究对象,研究了超声熔体处理、时效处理对块状偏析、显微组织及显微硬度的影响。结果表明,超声处理熔体并不能消除ZL205A合金中的块状偏析,对其尺寸和分布无影响,但对合金组织有一定的细化作用;时效时间对块状偏析相尺寸无影响,但对块状偏析相的显微硬度有影响,其显微硬度随时效时间的增加呈现先提高后减小的趋势,时效4 h时达到峰值硬度165.1 HV;均匀化热处理不能减轻或消除块状偏析。
The effects of ultrasonic melt treatment and aging treatment on block segregation,microstructure and microhardness of ZL205A alloy castings were studied.The results show that the ultrasonic treatment of the melt could not eliminate the block segregation in ZL205A alloy and has no effect on its size and distribution,but it has a certain refinement effect on the alloy microstructure.Aging time has no effect on the size of the mass segregation phase,but it has an effect on the microhardness of the mass segregation phase.The microhardness increase first and then decrease with the increase of aging time,and the peak hardness is 165.1 HV with 4 hours of aging treatment.Homogeneous heat treatment cannot reduce or eliminate block segregation.