Transactions of Materials and Heat Treatment

Title：Analysis on microstructures and mechanical properties of tin bronze under hot extrusion

Authors： He Quanzhi Li Hui Zhao Liding

Unit： Luliang College

KeyWords： tin bronze hot extrusion grain orientation recrystallization EBSD

ClassificationCode：TG142.7

year,vol(issue):pagenumber：2018,43(4):137-140

Abstract：

The microscopic changes of grain orientation for hot extrusion structure of tin bronze within a range of 620~720 ℃ were analyzed by EBSD. The results indicate that with the increasing of temperature, the grain size gradually increases from 9.3 μm to 15 μm, the length-diameter ratio gradually increases from 1.66 to 1.78, and the equiaxed trend is little. However, the grain orientation is presented in (111), (001) and (101) distributions, and other different orientations are also found. Thus, there is no obvious phenomenon of a texture with preferred orientation, and the grains are randomly distributed. In the test of tensile performance, it is found that the recrystallization grains have a certain influence on the plasticity of tin bronze. Within the range of 620~720 ℃, the tensile curves show the same trend. Both the tensile strength and yield strength decrease gradually. The difference is that when the temperature is above 700 ℃, the contraction percentage of cross section and the elongation rate of tin bronze decrease gradually resulting in poor plastic property.

Funds：

吕梁学院科研基金项目（ZRON201605）

贺全智（1964-），男，学士，副教授；E-mail：djq1652@163.com；通讯作者：李辉（1985-），男，硕士，讲师；E-mail：464956946@qq.com

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