调质热处理中Q960钢喷丸后表面氧化层形成的研究  

Formation of Oxide Layers on the Surface of Q960 Steel During Quenching and Tempering Heat Treatment after Shot Peening

作　　者：李国仓 秦金柱 梁亮[1] 刘怡私 熊维亮[1] 李会[1] 吴腾[2] 吴润[2] LI Guo-cang;QIN Jin-zhu;LIANG Liang;LIU Yi-shi;XIONG Wei-liang;LI Hui;WU Teng;WU Run(Hunan Valin Lianyuan Iron and Steel Company,Loudi Hunan 417009,China;College of Material and Metallurgy,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]湖南华菱涟源钢铁有限公司,湖南娄底417009 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《热处理技术与装备》2023年第1期17-21,共5页Heat Treatment Technology and Equipment

摘　　要：高强结构钢为获得最佳的强韧性一般采用调质热处理,其表面氧化铁皮对钢的质量有决定性的影响。本文对两种表面状态的钢进行了热处理,研究钢表面氧化皮结构及其形成。氧化皮均为四层:最外层为α-Fe_(2)O_(3)层、次外层Fe_(3)O_(4)、中间层Fe_(1-y)O和紧邻层。喷丸使氧化铁皮层间相混,并减少中间层Fe_(1-y)O中先共析Fe_(3)O_(4)析出和抑制共析反应,紧邻层与钢中含Cr有关,EBSD分析该层氧化铁皮中含有FeO·Cr_(2)O_(3)和Fe_(3)O_(4)颗粒。In order to obtain the best strength and toughness, high-strength structural steel is usually treated by quenching and tempering, and its surface oxide scale has a decisive influence on the quality of the steel. In this paper, the heat treatment of steel with two surface states is carried out, and the structure and formation of oxide scales on the steel surface are investigated. The oxide scale has four layers, the outermost layer is α-Fe_(2)O_(3), the sub-outer one is Fe_(3)O_(4), the middle one is Fe_(1-y)O and the adjacent one next to the matrix. Shot peening makes the iron oxide scale layer mixed, and reduces the precipitation of proeutectoid Fe_(3)O_(4)in the middle one of Fe_(1-y)O and inhibits the eutectoid reaction. The adjacent layer is related to the content of Cr in the steel. EBSD analysis shows that the iron oxide scale in this layer contains FeO·Cr_(2)O_(3)and Fe_(3)O_(4)particles.

关 键 词：调质处理 喷丸 氧化铁皮 共析转变 

分 类 号：TG142[一般工业技术—材料科学与工程]