山西太钢不锈钢股份有限公司,太原 030003
张志波(1983—),男,博士,高级工程师; E-mail : zhangzb@baowugroup.com
收稿:2025-02-24,
修回:2025-04-27,
录用:2025-04-27,
纸质出版:2025-09-30
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张志波,刘在龙,徐梅等.热处理温度对Fe-27Mn-9Al-1C-0.25V低密度钢组织和性能的影响[J].特殊钢,2025,46(05):91-95.
Zhang Zhibo,Liu Zailong,Xu Mei,et al.Effect of Heat Treatment Temperature on Microstructure and Properties of Fe-27Mn-9Al-1C-0.25V Low-density Steel[J].Special Steel,2025,46(05):91-95.
张志波,刘在龙,徐梅等.热处理温度对Fe-27Mn-9Al-1C-0.25V低密度钢组织和性能的影响[J].特殊钢,2025,46(05):91-95. DOI: 10.20057/j.1003-8620.2025-00048.
Zhang Zhibo,Liu Zailong,Xu Mei,et al.Effect of Heat Treatment Temperature on Microstructure and Properties of Fe-27Mn-9Al-1C-0.25V Low-density Steel[J].Special Steel,2025,46(05):91-95. DOI: 10.20057/j.1003-8620.2025-00048.
研究了不同热处理温度对Fe-27Mn-9 Al-1C-0.25V低密度钢力学性能、显微组织和断裂行为的影响。结果表明,热轧试验钢随着热处理温度由700 ℃提高至1 000 ℃,屈服强度、抗拉强度不断下降,断后伸长率不断升高。当热处理温度达到900 ℃时,材料塑性显著提高,热处理温度达到1 000 ℃时,强塑积达到最高,抗拉强度960 MPa,断后伸长率46%,强塑积达到44.16GPa·%。通过对不同热处理温度试样微观组织检验发现,当热处理温度≤800 ℃时,奥氏体与铁素体相界面可以看到明显的析出相,经检验为κ型碳化物。两相界面处的κ型碳化物会引起裂纹萌生,进而导致试验钢韧、塑性显著降低。
Mechanical properties, microstructure and fracture behavior of Fe-27Mn-9 Al-1C-0.25V low-density steel were analyzed after different heat treatment temperature.The results show that with the increased of heat treatment temperature from 700 ℃ to 1 000 ℃, the yield strength and tensile strength of the experimental steel decreased continuously, while the elongation increased continuously.When the heat treatment temperature reached 900 ℃, the plasticity of experimental steel was significantly improved. The experimental steel heat treated at 1 000 ℃, the product of strength with ductility reached the highest , its tensile strength reached 960 MPa, total elongation was 46%, and product of strength with ductility reached 44.16 GPa·%. Through microstructure of samples at different heat treatment temperatures, it was found that when the heat treatment temperature was ≤800 ℃, a distinct precipitate phase can be observed at the austenite-ferrite interface, identified as κ-type carbides. The κ-type carbides at the interphase can cause crack initiation, leading to a significant reduction in the toughness and ductility of the test steel.
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