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熔體過熱處理溫度對(duì)鑄態(tài)鎳基高溫合金K417返回料組織和力學(xué)性能的影響
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Effect of Temperature of Melt Superheat Treatment on Microstructure and Mechanical Properties of Recycled Ni-Base Superalloy K417
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    摘要:

    用金相顯微鏡和掃描電鏡研究了鎳基高溫合金K417返回料在1530, 1650, 1700, 1800 ℃下進(jìn)行5 min熔體處理后顯微組織以及碳化物尺寸、分布和形態(tài)的變化，并研究了熔體過熱處理后組織變化對(duì)合金室溫拉伸性能和高溫拉伸性能的影響。結(jié)果表明，在相同鑄造條件下，熔體高溫處理能使碳化物由塊狀向骨架狀轉(zhuǎn)變并有效阻止裂紋的擴(kuò)展，從而使合金得到良好的室溫和高溫強(qiáng)度及塑性

    Abstract:

    Microstructure evolution of recycled nickel-base superalloy K417 after melt superheat treatment at different temperatures of 1530, 1650, 1700 and 1800 oC for 5 min were investigated using optical microscope (OM) and scanning electronic microscope (SEM). The size, distribution and morphology of carbides were studied. The effect of microstructure change after melt superheat treatment on tensile properties at room and elevated temperatures was analyzed. Results show that the propagation of cracks is prevented effectively due to the morphology changes of carbides from block to script during the melt high temperature treatment, which results in higher strength and ductility of K417 alloy at room and elevated temperatures

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董加勝,曲文生,王大勇,樓瑯洪,楊 柯,孫曉峰.熔體過熱處理溫度對(duì)鑄態(tài)鎳基高溫合金K417返回料組織和力學(xué)性能的影響[J].稀有金屬材料與工程,2010,39(8):1480~1483.[Dong Jiasheng, Qu Wensheng, Wang Dayong, Lou Langhong, Yang Ke, Sun Xiaofeng. Effect of Temperature of Melt Superheat Treatment on Microstructure and Mechanical Properties of Recycled Ni-Base Superalloy K417[J]. Rare Metal Materials and Engineering,2010,39(8):1480~1483.]
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  • 收稿日期:2009-08-27
  • 最后修改日期:2009-12-30
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