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文摘
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通过金相法进行了TC4-DT钛合金相变点温度Tβ测定,并利用热膨胀法进行了验证。对不同冷却速度下TC4-DT钛合金的热膨胀量曲线进行测绘,结合显微组织分析和硬度测试,绘制了TC4-DT钛合金的SH-CCT曲线。结果表明,TC4-DT钛合金的相变温度为(945± 5) ℃。当冷速小于10 ℃/s时,由β相转变的α相呈不同取向的集束状,同时,晶内出现网篮状α相;当冷速大于10 ℃/s后,组织为马氏体α'相+块状α_m相;当冷速超过100 ℃/s后,组织为马氏体α'相。TC4-DT钛合金发生马氏体转变的开始温度为836 ℃,终了温度为760 ℃。 |
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其他语种文摘
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The transformation temperature Tβ of TC4-DT titanium alloy was measured by metallographic method,and verified by thermal expansion method. According to the expansion curves at different cooling rates,the SH-CCT curves of the TC4-DT titanium alloy were plotted by means of metallographic analysis and hardness test. The results show that the transformation temperature of the TC4-DT titanium alloy is (945 ± 5) ℃. When the cooling rate is less than 10 ℃/s,the α phase transformed from β phase is clustered with different orientations,and the net basket-like α phase appears. The microstructure is composed of martensite α phase and massive α_m phase when the cooling rate is greater than 10 ℃/s. As the cooling rate exceeds 100 ℃/s,the martensite α' phase is formed. The start temperature and the finish temperature of martensite transformation in the TC4-DT titanium alloy are 836 ℃ and 760 ℃,respectively. |
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来源
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金属热处理
,2020,45(5):157-161 【核心库】
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DOI
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10.13251/j.issn.0254-6051.2020.05.030
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关键词
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TC4-DT钛合金
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热膨胀法
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SH-CCT曲线
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显微组织
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相变
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地址
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1.
沈阳飞机工业(集团)有限公司, 辽宁, 沈阳, 110000
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中国科学院金属研究所, 沈阳材料科学国家研究中心, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0254-6051 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:6738348
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