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不同熱處理工藝對(duì)Ti6Al4V鈦合金微觀結(jié)構(gòu)和力學(xué)性能影響
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Southwest Petroleum University

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）;創(chuàng)新研究群體科學(xué)基金


The Effect of Different Heat Treatments on Microstructure and Mechanical Properties of Ti6Al4V Titanium Alloy
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Southwest Petroleum University

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    摘要:

    通過(guò)對(duì)Ti6Al4V鈦合金進(jìn)行不同工藝的熱處理，分析了不同工藝處理后的顯微組織，進(jìn)行了拉伸試驗(yàn)、示波沖擊試驗(yàn)測(cè)試。研究固溶時(shí)效處理對(duì)Ti6Al4V鈦合金顯微組織、力學(xué)性能和沖擊韌性的影響。利用金相顯微鏡、環(huán)境掃描電鏡（ESEM）進(jìn)一步分析了鈦合金的組織、沖擊斷口特征與力學(xué)性能間的關(guān)系。結(jié)果表明隨固溶溫度增加，鈦合金屈服強(qiáng)度和抗拉強(qiáng)度得到顯著提高，塑韌性先增加后降低。優(yōu)化熱處理工藝后，Ti6Al4V鈦合金經(jīng)960 ℃ WQ和500℃ × 4 h AC處理，獲得優(yōu)良綜合性能，σ0.2為1050MPa，σb為1120 MPa，Ak為46.22 J。鈦合金固溶時(shí)效后的組織由β基體和析出的α相組成，片層狀β相和小針叢狀α相組織提高合金綜合性能。

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    This paper analyzed the microstructure of Ti6Al4V titanium alloy after different heat treatments. The tensile experiment and instrumented impact test were done. It was studied that the microstructure, mechanical properties and impact toughness of Ti6Al4V titanium alloy were affected by the solution and aging treatment. The relationship among the microstructure, impact fracture characteristic and mechanical properties was analyzed by metallurgical mi-croscope and environment scanning electron microscope (ESEM). The results showed that the yield strength and ul-timate tensile strength were improved remarkably. The ductile increased firstly, then it decreased. The good compre-hensive properties can be gotten when the Ti6Al4V titanium alloy was treated in the condition of 960 ℃×1h WQ and 500 ℃×4h AC. The σ0.2 is 1050 MPa. The σb is 1120 MPa and Ak is 46.22 J. The microstructure of the tita-nium alloy after solution and aging treatment was consisted of the β matrix and the precipitation of the α-phase. The lamellar β-phase and the α-phase structure of the small needle plexiform can enhance comprehensive properties.

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劉婉穎.不同熱處理工藝對(duì)Ti6Al4V鈦合金微觀結(jié)構(gòu)和力學(xué)性能影響[J].稀有金屬材料與工程,2017,46(3):634~639.[liuwanying. The Effect of Different Heat Treatments on Microstructure and Mechanical Properties of Ti6Al4V Titanium Alloy[J]. Rare Metal Materials and Engineering,2017,46(3):634~639.]
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  • 收稿日期:2014-12-07
  • 最后修改日期:2015-03-10
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-05-18
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