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均勻化處理對(duì)Ni3Al基MX246A合金熱壓縮塑性的影響
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Effect of Homogenization on Hot Compression Ductility of Ni3Al-Based MX246A Alloy
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    摘要:

    在MTS試驗(yàn)機(jī)上研究了不同均勻化工藝對(duì)MX246A合金熱壓縮塑性的影響。結(jié)果表明，隨著均勻化溫度的升高和均勻化時(shí)間的延長，MX246A合金的熱壓縮塑性和均勻性增加；采用1160 ℃保溫24 h+1230 ℃保溫48 h的均勻化工藝后，變形量達(dá)到80%時(shí)，MX246A合金變形仍較為均勻，表面質(zhì)量良好。經(jīng)過微觀組織的分析發(fā)現(xiàn)，絕熱剪切帶的形成引起MX246A合金在壓縮過程中失穩(wěn)；晶界和枝晶間的γ′相包覆碳化物的復(fù)合組織強(qiáng)化、成分偏析的減輕是均勻化后MX246A合金熱壓縮塑性提高的主要原因。

    Abstract:

    The effect of different homogenization treatments on hot compression ductility for MX246A alloy was investigated on MTS test machine. The results show that hot compression ductility and uniformity of MX246A alloy increase with elevating homogenization temperature and prolonging homogenization time; homogenized at 1160 oC for 24 h + 1230 oC for 48 h, MX246A alloy could be compressed for 80% reduction with uniform deformation and good surface quality. The microstructure observation reveals that the compression destabilization of MX246A alloy is caused by adiabatic shear band, and the enhancement of hot compression ductility is mainly contributed to the alleviated segregation and the strengthening of carbides enveloped by γ′ phase.

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王建濤,韓 偉,駱合力,李尚平.均勻化處理對(duì)Ni3Al基MX246A合金熱壓縮塑性的影響[J].稀有金屬材料與工程,2014,43(12):3167~3171.[Wang Jiantao, Han Wei, Luo Heli, Li Shangping. Effect of Homogenization on Hot Compression Ductility of Ni3Al-Based MX246A Alloy[J]. Rare Metal Materials and Engineering,2014,43(12):3167~3171.]
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  • 收稿日期:2013-12-11
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  • 在線發(fā)布日期: 2015-04-16
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