氮?dú)鈿夥障录す馇懈顚C11鈦合金組織及焊接接頭性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-26
對TC11鈦合金在氮?dú)夥障逻M(jìn)行激光切割，并在氮?dú)夥障逻M(jìn)行熱處理，對比熱處理前后的顯微組織和硬度，確定熱影響層深度。去除激光切割影響層后進(jìn)行電子束焊接，比較研究未激光切割和激光切割焊接接頭的拉伸和疲勞性能。
氮?dú)鈿夥障录す馇懈顚C11鈦合金組織及焊接接頭性能的影響Effect of laser cutting in nitrogen atmosphere on microstructure of TC11 titanium alloy and properties of welding joints對TC11鈦合金在氮?dú)夥障逻M(jìn)行激光切割，并在氮?dú)夥障逻M(jìn)行熱處理，對比熱處理前后的顯微組織和硬度，確定熱影響層深度。去除激光切割影響層后進(jìn)行電子束焊接，比較研究未激光切割和激光切割焊接接頭的拉伸和疲勞性能。結(jié)果表明：激光切割熱影響層深度在2~3 mm之間；未激光切割和激光切割TC11鈦合金焊接接頭低周疲勞性能未見明顯差異，但是激光切割后的焊接接頭抗拉強(qiáng)度和伸長率相對未激光切割焊接接頭分別低45 MPa和3%左右。
TC11 titanium alloy plates were cut by laser and then heat treated in nitrogen atmosphere. The microstructure and microhardness of the surface layers affected by laser cutting were investigated before and after heat treatment. The depth of the heat influence zones by laser cutting was tested. The influenced layers by laser cutting were removed and then the plates were joined by electron beam welding. The effect of laser cutting on the tensile and fatigue properties of the welding joints of TC11 titanium alloy was studied. The results show that the depth of the heat influence zones by laser cutting is in the range of 2 mm to 3 mm. The effect of laser cutting on the low-cycle fatigue property of the welding joint of TC11 titanium alloy is slight, but laser cutting make the tensile strength and elongation percentage decrease by 45 MPa and 3%, respectively.
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