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以强力旋压工艺加工的高速柴油机连杆衬套为基础,通过金相、XRD和洛氏硬度实验研究热挤压、强力旋压、热处理三种主要工艺对锡青铜合金的金相组织和力学性能的影响。结果表明:热挤压后晶粒稍有细化;强力旋压后,晶粒得到了明显的细化,材料发生加工硬化;退火可消除残余内应力,不改变组织结构。
Based on the high-speed diesel engine connecting rod bushings processed by the powerful spinning process, the microstructure, mechanical properties and corrosion resistance of the tin bronze alloy were studied by means of metallographic examination, XRD and Rockwell hardness test under the conditions of hot extrusion, strong spinning and heat treatment The impact of performance. The results show that the grains are slightly refined after hot extrusion; the grains are obviously refined after the strong spinning, and the materials are hardened; the residual stress can be eliminated by annealing without changing the structure.