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β固溶處理對TC21合金組織性能的影響
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更新時間：2015-09-11
對等軸組織TC21合金進(jìn)行β相區(qū)高溫固溶+α/β相區(qū)低溫固溶+低溫時效熱處理；分析β相區(qū)高溫固溶冷卻速率、α/β相區(qū)低溫固溶溫度對TC21合金組織和性能的影響。
β固溶處理對TC21合金組織性能的影響Effect of β solution treatment on morphology and mechanical properties of TC21 alloy
對等軸組織TC21合金進(jìn)行β相區(qū)高溫固溶+α/β相區(qū)低溫固溶+低溫時效熱處理；分析β相區(qū)高溫固溶冷卻速率、α/β相區(qū)低溫固溶溫度對TC21合金組織和性能的影響。結(jié)果表明：隨著β相區(qū)固溶冷卻速率的增加，α/β相區(qū)固溶熱處理后合金中條狀α相尺寸明顯減小，α條厚度減?。浑S著α/β區(qū)固溶處理溫度的降低，在相同的β相區(qū)固溶冷卻速率下，合金中的初生條狀初生α相尺寸有一定的減小，相含量增加。經(jīng)過(960 °C, 1 h, FC)+ (890 °C, 1 h, AC)+(620 °C, 6 h, AC)三重?zé)崽幚砗?，TC21合金的強(qiáng)度、塑性和韌性匹配較好。這表明三重?zé)崽幚砜梢愿纳瞥Ｒ?guī)鍛造TC21合金的綜合力學(xué)性能。
The equiaxed TC21 alloy samples were β solution treated, followed by α/β solution treatment and then aged at low temperature. The effect of β heat treatment cooling rate and temperature of α/β heat treatment on the morphology of TC21 alloy was analyzed. The results show that higher cooling rate of β heat treatment leads to the shrinking of platelet α phase, in the α/β heat treatment process. It is also confirmed that lower α/β heat treatment temperature, after the same beta heat treatment process, results in the decrease of width and increase of the content of platelet α phase. After optimized triplex heat treatment (960 °C, 1 h, FC)+(890 °C, 1 h, AC)+(620 °C, 6 h, AC), the strength, plasticity and fracture toughness match well, indicating that the triplex heat treatment can improve the synthetical mechanical properties of TC21 alloy.
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