【摘要】 采用扫描电镜观察、粉末镶嵌试样、XRD和模压成形等方法,研究了置氢(H,wt%)对TC21合金粉末颗粒形貌、表面状态、显微组织、相组成、显微硬度和压制性能等的影响。结果表明:置氢TC21粉末颗粒形貌为不规则状,粉末主要由亮相α相及暗相β相组成,颗粒显微组织呈片状、α/β集束状和网篮状。随置氢量的增加,置氢TC21粉末显微硬度呈降低趋势;α相逐渐减少,β相逐渐增多,并且有少量的α″相生成;粉末的压缩性能呈先变差后变好的不明显变化趋势,成形性能先变差又逐渐变好,置氢量0.10 wt%,0.39 wt%TC21粉末压制性能较好,置氢量0.22 wt%的TC21粉末的压制性能最差。更多还原

【Abstract】 The influence of hydrogenation on the particle morphology and surface state,particle microstructure and phase component,microhardness and pressing property of TC21 alloy powder were investigated by means of SEM,powder inlaid,XRD and die forming.The results show that the hydrogenated TC21 alloy powder with different hydrogen content possess irregular morphologies,and which are composed of bright α phase and dark β phase and exhibit lamellar structure,α/β cluster and basket structure.With the increase of hydrogen content,the microhardness of hydrogenated TC21 alloy powder shows a decreasing trend,the α phase decrease and the β phase increase gradually,a little amount of α″ phase is formed.The compressive property and forming property of hydrogenated TC21 alloy powder get worse firstly and then get better gradually,but the change of compressive property is not obviously.The pressing properties of hydrogenated TC21 alloy powder with hydrogen content of 0.10 wt%,0.39 wt% are better than that of others and the powder with hydrogen content of 0.22 wt% is the worst one.更多还原