The methods of scanning electron microscopy and x-ray diffractometry are used to study the microstructure and mechanical properties of welded joints from alloy Ti60 after laser welding and subsequent heat treatment (PWHT). It is shown that the microstructure of the welded joint consists of three zones, i.e., a fusion zone (FZ), a heat-affected zone (HAZ) and base metal (BM). The PWHT lowers considerably the hardness in the FZ and in the internal HAZ, which results in a more homogeneous hardness profile as compared to the post-welding condition. After the heat treatment, the ultimate strength of the welded joint is 980 MPa at room temperature and 728 MPa at 600°C, the elongation is 10.9% at room temperature and 18.3% at 600°C.

采用扫描电子显微镜和X射线衍射法研究了Ti60合金激光焊接及后续热处理（PWHT）后焊接接头的组织和力学性能。结果表明，焊接接头的微观结构由三个区域组成，即熔合区（FZ），热影响区（HAZ）和贱金属（BM）。PWHT大大降低了FZ和内部HAZ中的硬度，与焊接后条件相比，这导致了更均匀的硬度分布。热处理后，焊接接头的极限强度在室温下为980 MPa，在600°C下为728 MPa，在室温下的伸长率为10.9％，在600°C下为18.3％。