Cu-Sn-Ti alloy was prepared by adding TiH2 to the copper tin alloy.The effect of TiH2 addition on the microstructure and grinding performance of the bronze alloy was studied,and the mechanism of TiH2 action was discussed.The results show that adding TiH2 to the bronze alloy can effectively reduce the sintering temperature.When the a-mount of TiH2 is greater than 9 vol％,the diffraction peak of TiH2 can be clearly detec-ted.Under the same conditions,with the increase of TiH2 addition,the grain size of the alloy first increases and then decreases,and finally stabilizes.The hardness of the alloy first decreases and then increases,and finally decreases.When the addition amount of TiH2 is 12 vol％,the promotion effect of TiH2 on the refinement of alloy grains and uni-form distribution of microstructure reaches the best,and the hardness of the alloy reaches the maximum of 75.2(HR 15 N),indicating the best wear resistance of the alloy.When the TiH2 content is below 12 vol％,a certain amount of TiH2 can refine the grains during the sintering process of Cu-Sn-Ti alloy by suppressing grain boundary segregation,pro-moting uniform distribution of the alloy structure,and improving the grinding perform-ance of the alloy.
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