本文選題：置氫 + 均勻性系數(shù)��； 參考：《焊接學(xué)報(bào)》2017年08期

【摘要】：文中采用置氫處理的方式對(duì)鈦合金激光焊接接頭超塑性變形組織均勻性展開研究,研究不同的置氫量對(duì)TC4鈦合金激光焊接頭變形均勻性和組織均勻性的影響,并引進(jìn)變形不均勻性系數(shù)和組織均勻化系數(shù)來(lái)進(jìn)行表征.結(jié)果表明,置氫可以調(diào)節(jié)鈦合金激光焊接接頭中相組成,改善焊接接頭超塑性變形均勻性.隨著置氫量的增大,組織均勻化系數(shù)越大,組織均勻化程度越高;在相同置氫量,變形溫度的升高或初始應(yīng)變速率的降低均會(huì)使均勻化程度上升,并在置氫量1.30%、變形溫度920℃、應(yīng)變速率1×10~(-4)s~(-1)的條件下接頭組織均勻化系數(shù)達(dá)到了95%.
[Abstract]:In this paper, the homogeneity of superplastic deformation microstructure of laser welded joint of titanium alloy was studied by hydrogen insertion, and the effect of different hydrogen content on the uniformity of deformation and microstructure of laser welded joint of TC4 titanium alloy was studied. The deformation inhomogeneity coefficient and the structure homogenization coefficient were introduced to characterize them. The results show that hydrogen insertion can adjust the phase composition of laser welded joint of titanium alloy and improve the uniformity of superplastic deformation of welded joint. With the increase of hydrogen content, the higher the homogenization coefficient, the higher the homogenization degree, the higher the deformation temperature, the lower the initial strain rate, the higher the homogenization degree is, and the higher the hydrogen content is 1.30, the deformation temperature is 920 鈩，

本文編號(hào)：1790679