ISSN:1003-8620
CN:42-1243/TF
Governed by: CITIC Pacific Special Steel Group Co., LTD
Sponsored by: Daye Special Steel Co., LTD.
Special Steel ›› 2023, Vol. 44 ›› Issue (2): 96-100.DOI: 10.20057/j.1003-8620.2022-00047
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Hou Meiling , Li Chenxiao , Kong Xiangwei , Bai Yun
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侯美伶,李晨潇,孔祥伟,白 云
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Abstract: The microstructure evolution and mechanical properties of Fe-Mn-Al steel under different annealing,solution and aging processes are studied by meansa of SEM, XRD and EPMA. The results show that the 900- 1050 ℃annealing temperature has a great influence on the microstructure and properties of the tested steel. With the increase of annealing temperature,the grain size increases,the carbide gradually redissolved,the strength decreases,and the plasticity-toughness improves. When the annealing temperature is at 1050 ℃ for 2 h air cooling,the tensile strength is 1036 MPa,the elongation is 39%,the impact energy is 41 J and the best plasticity-strength is 40 GPa ·%.The microstructure of the test steel is austenite + ferrite +k carbides after solution treatment at 1050 ℃ for 2 h and water cooling. With the increase of aging temperature,k carbides precipitate gradually,which increases the strength and decreases the plasticity and toughness of the test steel. When aged at 600 ℃,the tensile strength is 1145 MPa,the elongation is 22% and the impact energy is 28 J, the comprehensive mechanical properties all meet the design requirements.
Key words: Fe-Mn-Al-C Steel, Annealing Temperature;Aging Temperature, Mechanical Properties, Microstructure
摘要: 利用SEM、XRD、EPMA 等试验方法,对不同退火、固溶以及时效工艺下Fe-Mn-Al-C 钢的组织演变规律和力学性能进行研究。结果表明,900~1050 ℃退火温度对试验钢的组织与性能影响较大,随着退火温度的升高晶 粒尺寸增大、碳化物逐渐回溶,强度降低、塑韧性提高,在1050℃保温2h 空冷时抗拉强度为1036 MPa,断后伸长率为39%,冲击功41 J,强塑积40 GPa ·%; 经1050 ℃保温2 h水冷固溶后时效处理,试验钢组织为奥氏体+铁素 体+k碳化物,随着时效温度的增高,k碳化物逐渐析出,使试验钢的强度增加、塑韧性降低。600 ℃时效时,抗拉 强度1145 MPa、断后伸长率22%、冲击功28 J,综合力学性能全部满足设计要求。
关键词: Fe-Mn-Al-C钢, 退火温度, 时效温度, 力学性能, 显微组织
Hou Meiling , Li Chenxiao , Kong Xiangwei , Bai Yun. Effect of Heat Treatment Process on Microstructure and Properties of Fe-Mn-Al-C Steel[J]. Special Steel, 2023, 44(2): 96-100.
侯美伶, 李晨潇, 孔祥伟, 白 云. 热处理工艺对 Fe-Mn-Al-C钢组织和性能的影响[J]. 特殊钢, 2023, 44(2): 96-100.
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URL: https://www.specialsteeljournal.com/EN/10.20057/j.1003-8620.2022-00047
https://www.specialsteeljournal.com/EN/Y2023/V44/I2/96