Effect of zirconium on inclusions and mechanical properties of China low activation martensitic steel

Guo-xing Qiu; Dong-ping Zhan; Lei Cao; Hui-shu Zhang

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Effect of zirconium on inclusions and mechanical properties of China low activation martensitic steel

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The effects of 0.01–0.11 wt.%Zr on the inclusions,microstructure,tensile properties,and impact toughness of the China low activation martensitic steel were investigated.Results showed that Zr exhibits good deoxidation and desulfurization abilities.The scanning electron microscope was used to examine the inclusions in the ingots.The main inclusions in the alloys were Zr–Ta–O,Zr–O,and Zr–O–S.However,some blocky Zr-rich inclusions appeared in Zr-2 and Zr-3 alloys.Typical martensitic structures were observed in the alloys,and average prior austenite grain sizes of 21.1,15.7,and 14.8µm were obtained for Zr-1,Zr-2,and Zr-3 steels,respectively.However,increasing Zr content of the steels deteriorated their mechanical property,owing to the blocky inclusions.The alloy with 0.01%Zr resulted in excellent mechanical properties due to the fine inclusions and the precipitation of Zr3V3C carbides.Values of 576 and 682 MPa were obtained for the yield strength and ultimate tensile strength of Zr-1 alloy,respectively.Furthermore,the ductile–brittle transition temperature of the alloy decreased to−85℃.

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《钢铁研究学报：英文版》 |2021年第9期|1168-1179|共12页
作者
Guo-xing Qiu; Dong-ping Zhan; Lei Cao; Hui-shu Zhang;
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作者单位

School of Metallurgical Engineering;

Xi’an University of Architecture and Technology;

Xi’an;

710055;

Shaanxi;

China;

School of Metallurgy;

Northeastern University;

Shenyang;

110819;

Liaoning;

China;

Materials Engineering Department;

Hebei College of Industry and Technology;

Shijiazhuang;

050091;

Hebei;

China;

School of Metallurgy Engineering;

Liaoning Institute of Science and Technology;

Benxi;

117004;

Liaoning;

China;

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原文格式 PDF
正文语种 chi
中图分类金属学与热处理;
关键词
China low activation martensitic steel; Zr; Inclusion; Tensile strength; Ductile-to-brittle transition temperature;

Effect of zirconium on inclusions and mechanical properties of China low activation martensitic steel

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