ZTM630镁合金双级时效实验研究

doi:10.3976/j.issn.1002-4026.2018.03.006

Abstract

Abstract:

By changing the finalaging time, the microstructure evolution and mechanical properties of extruded Mg-6Zn-3Sn-0.5Mn alloy were investigated by means of optical electron microscopy, scanning electron microscopy and transmission electron microscopy. Results showed that through the twostep aging treatment, the suitable parameter was 90 ℃×12 h+180 ℃×8 h. Under this parameter, ultimate tensile strength and elongation of the alloy reached 383.1 MPa,7.667%, respectively. After two-step aging treatment, there were dispersed and fine precipitates precipitated in matrix and grain boundaries, which were mainly of Mg2Sn and MgZn2 phases. During the process of stretching, the precipitation strengthen effect of dispersed fine precipitated phase and the strengthening effect inhibiting the grain movement made the mechanical properties of the alloy better.

Key words: Mg-Zn-Sn-Mn alloy, two-step aging treatment, microstructure

CLC Number:

TG146.2

WANG Na-na, ZHOU Ji-xue, LIU Yu, ZHAO Dong-qing, MA Bai-chang, YANG Yuan-sheng. Experimental study on two-stage aging treatment of ZTM630 magnesium alloy[J].SHANDONG SCIENCE, 2018, 31(3): 34-38.

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Experimental study on two-stage aging treatment of ZTM630 magnesium alloy

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