研究了样坯形状、取样位置、样坯大小对钛铸件力学性能的影响。试验按照铸件壁厚的不同附铸不同厚度的板状试样、棒状试样,并从浇道上取样,然后与从测试铸件本体上不同壁厚处取样测定的力学性能进行比较。结果表明,不同厚度的板状样坯与铸件本体上相应壁厚处取样测试结果更接近,能更好地代表铸件的性能。从板状样坯厚度方向1/4处取样测试的力学性能略高于1/2处取样,但这种差别很小。与单铸的板状试样相比,整体附铸的样坯与铸件上该厚度处的本体试样性能非常接近,在铸造重要结构件或大型、承受大载荷、高压的钛铸件时,可采用整体附铸试样的方法。对于同一种形状的样坯,一定范围内随着试样规格的增大,其力学性能逐渐降低。 The effects of sample shape, sampling position and sample size on the mechanical properties of titanium castings were studied. In accordance with the different thickness of the casting test cast plate-shaped specimens of different thickness, rod-like sample, and sampling from the runner, and then measured from the different parts of the body thickness of the test castings measured mechanical properties were compared. The results show that the plate samples with different thicknesses are closer to the sample wall thickness at the corresponding wall thickness and better represent the performance of the castings. The mechanical properties of the sample taken from a quarter of the thickness of the plate-like sample were sampled slightly above 1/2, but the difference was small. Compared with a single cast plate sample, the overall cast sample and bulk casting castings at the thickness of the bulk sample performance is very close, in the casting of important structural parts or large, to withstand high load, high pressure titanium castings, The overall method of attaching the sample is adopted. For the same shape of the sample, within a certain range with the sample size increases, the mechanical properties gradually decreased.