CAJ | 학술논문

通过改变固溶时效温度对T C4钛合金饼材进行研究，用金相显微镜观察了其微观组织形貌，测试了力学性能。结果表明：在相变点以下930℃、950℃和970℃温度下固溶，530℃/6 h时效，随着固溶温度的升高，饼材初生α晶粒逐渐长大，强度先升高后降低，塑性先降低再升高；在相变点以上990℃/1 h固溶，530℃/6 h下时效后，饼材出现魏氏组织，强度和塑性均大幅下降；在950℃/1 h固溶，530℃/6 h下时效后， T C4饼材的组织均匀，力学性能达到良好的匹配。
통과개변고용시효온도대T C4태합금병재진행연구，용금상현미경관찰료기미관조직형모，측시료역학성능。결과표명：재상변점이하930℃、950℃화970℃온도하고용，530℃/6 h시효，수착고용온도적승고，병재초생α정립축점장대，강도선승고후강저，소성선강저재승고；재상변점이상990℃/1 h고용，530℃/6 h하시효후，병재출현위씨조직，강도화소성균대폭하강；재950℃/1 h고용，530℃/6 h하시효후， T C4병재적조직균균，역학성능체도량호적필배。
The microstructure and tensile property of TC4 wrought was studied by changing solid solution temperature after forging . The aging treatment at 530 ℃ for 6 h was carried out after solid solution .The microstructure was observed by optical microscope and tensile properties were evaluated with a tensile tester .The result shows that the primary α-phase of TC4 wrought grows gradually ;the tensile strength increases at first and decreases subsequently ;the plastic property decreases at first and then increases with the solid solution temperature increasing from 930 ℃ to 970 ℃ .When solid solution temperature steps up to 990 ℃ (above the transformation temperature) ,the Widmanstaten structure is found .And the tensile properties of TC4 wrought reduce apparently . Consequently ,homogeneous microstructure and excellent tensile properties of the TC4 wrought are obtained when the solid solution temperature is 950 ℃ .