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作 者:唐恩 彭侠超 张瑞 胡思思 TANG En;PENG Xiachao;ZHANG Rui;HU Sisi(Department of Materials Engineering,Zhejiang Industry&Trade Vocational College,Wenzhou 325003,Zhejiang China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu China)
机构地区:[1]浙江工贸职业技术学院,浙江温州325003 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050
出 处:《热处理》2024年第3期24-31,共8页Heat Treatment
基 金:杭钢集团重点科研项目(2022B01)。
摘 要:对直径为25 mm的低密度高强度Fe-2.0Mn-4.7Al-0.41C钢试棒分别在800℃、830℃、860℃、890℃和920℃保温120 min奥氏体化后水淬以及在860℃分别保温10~240 min奥氏体化后水淬.检测了不同温度保温不同时间奥氏体化随后水淬的试棒的显微组织及其显微硬度和维氏硬度,以确定Fe-2.0Mn-4.7Al-0.41C钢的最合适的奥氏体化工艺.结果表明:在奥氏体化120 min的情况下,随着奥氏体化温度从800℃升高至920℃,钢的奥氏体化逐渐完全,860℃保温120 min的奥氏体化效果最好,硬度为270 HV1;在860℃保温10~240 min奥氏体化的情况下,随着保温时间的延长,钢的奥氏体化逐渐完全,但奥氏体化时间超过180 min时,钢的奥氏体晶粒发生聚集长大,硬度下降;Fe-2.0Mn-4.7Al-0.41C钢最合适的奥氏体化工艺为860℃保温180 min.Low-density high-strength Fe-2.0Mn-4.7Al-0.41C steel test bars 25 mm in diameter were austenitized at 800,830,860,890,and 920℃for 120 min then water quenched,respectively,as well as were austenitized at 860℃for 10 to 240 min then water quenched,respectively.After being austenitized at different temperatures for different times then water quenched,the test bars were tested for microstructures,micro-hardness and Vickers-hardness,to identify austenitizing process the most suitable to Fe-2.0Mn-4.7Al-0.41C steel.The results showed that(a)in the case of austenitizing for 120 min,as the austenitizing temperature increased from 800℃to 920℃,the austenizing of the steel gradually became complete,the austenitizing at 860℃for 120 min was the most effective,and the hardness was 270 HV1;(b)in the case of austenitizing at 860℃for 10 to 240 min,with the extension of holding time,the austenizing of the steel gradually became complete,however,the steel austenitized for more than 180 min exhibited the aggregation and growth of austenite grains and the decrease in hardness.The austenitizing process most suitable to Fe-2.0Mn-4.7Al-0.41C steel is 860℃for 180 min.
分 类 号:TG142[一般工业技术—材料科学与工程]
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