Transactions of Materials and Heat Treatment

Title：Influences of ECAP and rolling process on β phase morphology and tensile strength of brass H65

Authors： Hu Yujun Li Junwei Kuang Junping

Unit： Jiangxi Teachers College Jiangxi Guangxin Advanced Material

KeyWords： ECAP deformation rolling brass H65 β phase tensile strength

ClassificationCode：TG379；TG339；TG146.11

year,vol(issue):pagenumber：2017,42(10):101-105

Abstract：

The equal channel angular pressing（ECAP） and rolling tests for brass H65 were conducted, and the evolutions of β phase morphology and tensile strength of samples before and after ECAP and rolling deformations were studied. The results show that the β phase in cast state mainly presents as semi-continuous mesh and short rod without directions. After odd passes of ECAP deformation, the parallel space of β phase becomes closer, and the β phase is elongated long strip with the angle of 30° between β phase and extrusion direction. However, after even passes of ECAP deformation, the parallel space of β phase becomes sparse, and the β phase is deformed into short rod without directions. Furthermore, after any passes of ECAP deformation and rolling, the parallel space of β phase becomes small, and almost all the β phase becomes longer with the horizontal distribution. Thus, the tensile strength of brass H65 increases with the increasing of extrusion passes, and after ECAP deformation and rolling, the tensile strength of the same sample is improved greatly. At last, the smaller the angle between β phase direction and tensile axis is, the narrower the parallel space of β phase is, the bigger the tensile strength of brass H65 is.

Funds：

江西省教育厅科学技术研究重点项目（GJJ151345）

作者简介：胡玉军（1989-），男，硕士，助教，E-mail：hyj0525@126.com

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