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对固相烧结的WTi10合金在–196℃下进行了深冷处理。对合金的显微硬度、XRD物相、SEM及TEM形貌等进行了分析和表征。结果表明:深冷处理后,合金的组成依然为富钨相和富钛相;随深冷时间的增加,钨钛合金组织中富钛相所占面积比例先增大后减小,24 h深冷处理后组织中富钛相的比例与未处理试样的差别不大;合金的晶粒尺寸也呈现先增大后减小的变化趋势,24 h后晶粒尺寸最大减小了24.6%;晶粒尺寸分布更加均匀。深冷处理能显著提高WTi10合金的显微硬度和致密度,深冷处理24 h后合金的显微硬度大约是深冷前的2.5倍;深冷24 h后合金的择优取向由(110)变为(110)和(200)。
The solid-phase sintered WTi10 alloy was cryogenically treated at -196 ° C. The microhardness, XRD phase, SEM and TEM morphology of the alloy were analyzed and characterized. The results show that the composition of the alloy is still rich in tungsten and rich in titanium after cryogenic treatment. With the increase of cryogenic time, the proportion of the titanium rich phase in the tungsten-titanium alloy first increases and then decreases. After 24 h cryogenic treatment The proportion of titanium-rich phase in the microstructure is not different from that of the untreated sample. The grain size of the alloy also increases first and then decreases, and the maximum grain size decreases by 24.6% after 24 h. The grain size distribution More uniform. Cryogenic treatment can significantly improve the microhardness and density of WTi10 alloy, and the microhardness of WTi10 alloy is about 2.5 times higher than that of pre-cold 24 h after cryogenic treatment. The preferred orientation of the alloy after (120) 110) and (200).