核电轮盘喷丸层组织结构的Ｘ射线衍射表征
Characterization of Shot Peened Surface Layer of Nuclear Power Turbine Wheel Disk via X-ray Diffraction Method
摘 要
对核电轮盘进行了喷丸强化处理, 利用X射线衍射应力分析仪、硬度仪等表征了喷丸层晶粒尺寸、显微畸变、残余应力和硬度的变化规律。结果表明: 喷丸强化后轮盘表面组织发生了细化并产生了显微畸变, 其亚晶粒尺寸和显微畸变分别为24 nm和2.9×10-3, 组织细化效果明显, 并呈梯度分布, 其变化规律与显微硬度随层深分布规律一致; 喷丸后表层最大残余压应力达到601 MPa, 表面显微硬度最大达到398 HV, 至心部逐渐减小。
亚晶粒尺寸
显微畸变
显微硬度
spot peening
domain size
micro-strain
micro-hardness
Abstract
The nuclear power turbine wheel disk was treated by shot peening. The domain size, micro-strain, residual stress and micro-hardness of the shot peened surface layer were analyzed by X-ray diffraction stress analyzer and hardness tester. The results show that the microstructure of the shot peened surface layer refined and the micro-strain occured on it. The domain size and micro-strain of the wheel disk after shot peening were 24 nm and 2.9×10-3, respectively. The microstructure strengthen effect was obviously, meanwhile, the refined microstructure had a gradient distribution. The distribution of micro-hardness was according with the distribution of refined microstructure with the depth. The maximum values of 601 MPa in residual pressure stress and 398 HV in the micro-hardness were given on the spot peened surface, then the values gradually decreased from the surface to the centre.
中图分类号 TG178
所属栏目 材料性能及其应用
基金项目
收稿日期 2012/6/3
修改稿日期 2013/3/5
网络出版日期
作者单位点击查看
备注袁建平(1965-), 男, 上海人, 高级工程师。
引用该论文: YUAN Jiang-ping,CHENG Gang,DING Li-feng. Characterization of Shot Peened Surface Layer of Nuclear Power Turbine Wheel Disk via X-ray Diffraction Method[J]. Materials for mechancial engineering, 2013, 37(6): 61～62
袁建平,程钢,丁丽峰. 核电轮盘喷丸层组织结构的Ｘ射线衍射表征[J]. 机械工程材料, 2013, 37(6): 61～62
被引情况:
【1】张杰,白雪飘,陆业航,李众城, "不同强度喷丸处理后铝锂合金表面的残余应力",机械工程材料 40, 37-39(2016)
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参考文献
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【3】栾伟玲, 涂善东.喷丸表面改性技术的研究进展[J].中国机械工程 2005, 16 (15): 1405-1409.
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【5】SCARDI P, LEONI M, DELHEZ R. Line broadening analysis using integral breadth methods: a critical review[J].Journal of Applied Crystallography 2004, 37(3): 381-390.
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