熱變形參數(shù)對(duì)BTi?62421S合金微觀組織及性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-06
在Gleeble?3800熱模擬實(shí)驗(yàn)機(jī)上對(duì)BTi?62421S合金鑄態(tài)材料，在溫度850～1 050 ℃、應(yīng)變速率0.01～30 s?1、變形程度70%條件下進(jìn)行了等溫恒應(yīng)變速率壓縮實(shí)驗(yàn)。通過(guò)金相分析，研究熱變形參數(shù)(變形溫度、應(yīng)變速率)對(duì)BTi?62421S合金微觀組織的影響。
熱變形參數(shù)對(duì)BTi?62421S合金微觀組織及性能的影響Effect of hot deformation parameters on microstructures and?properties of BTi?62421S alloy在Gleeble?3800熱模擬實(shí)驗(yàn)機(jī)上對(duì)BTi?62421S合金鑄態(tài)材料，在溫度850～1 050 ℃、應(yīng)變速率0.01～30 s?1、變形程度70%條件下進(jìn)行了等溫恒應(yīng)變速率壓縮實(shí)驗(yàn)。通過(guò)金相分析，研究熱變形參數(shù)(變形溫度、應(yīng)變速率)對(duì)BTi?62421S合金微觀組織的影響。結(jié)果表明，變形溫度和應(yīng)變速率顯著影響片層組織等軸化的程度，在β相變點(diǎn)以下，隨著溫度的升高，片層組織等軸化程度增大，組織更均勻。對(duì)變形后的試樣做了硬度實(shí)驗(yàn)，結(jié)果表明合金的硬度開(kāi)始隨著溫度的升高而升高，出現(xiàn)峰值后降低。
The compression test of BTi?62421S alloy was carried out at temperatures of 850?1 050 ℃, strain rates of 0.01?30 s?1?and deformation of 70% by the Gleeble?3800 thermal-mechanical simulator. The effects of hot deformation parameters on microstructure of the alloy were investigated by optical microscopy. The results show that the equiaxial degree of lamellar structure is significantly affected by hot deformation parameters, including deformation temperature and strain rate. The deformation temperature and strain rate have significant effects on the equiaxial degree of lamellar structure. The phenomenon (the equiaxial degree of lamellar structure) is increased and the microstructure of alloy is more uniform with the temperature increasing below β phase transition point. Moreover, it can be also seen from hardness test that the hardness of the alloy increases firstly and then decreases with the temperature increasing.
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