温度对高碳钢线材氧化铁皮厚度和结构的影响  

Effects of Temperature on Thickness and Structure of Iron Oxide Scale of High Carbon Steel Wire Rods

作　　者：詹三林[1] 任勇[1] 程晓茹[1] 范敬国[2] 沈金龙[2] 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武汉钢铁股份有限公司,湖北武汉430083

出　　处：《热加工工艺》2014年第16期209-211,共3页Hot Working Technology

摘　　要：应用5种不同的热处理工艺研究高碳钢线材氧化铁皮在高温下的氧化机制,对热处理后的5个试样表面的氧化铁皮进行SEM观察。研究了高碳钢线材在氧化过程中,温度对氧化铁皮厚度的影响规律和氧化铁皮先共析反应温度。结果表明,在高温氧化时,随温度的升高,氧化铁皮厚度随之增加,在850℃以上时,其氧化速率急剧增加;氧化铁皮从高温冷却到700℃时,FeO处于不稳定状态,析出单相Fe3O4,减少了下一步要发生共析反应的FeO的量,从而降低了共析组织α-Fe+Fe3O4在整个氧化铁皮中所占比率。Effects of temperature on the thickness of iron oxide scale and the pro-eutectoid temperature respectively during oxidation process of high carbon steel wire rods were studied. SEM images of metallurgical structure of iron oxide scale of 5 samples with different heat treatment methods were analyzed. The results show that the thickness of iron oxide scale increases with the increase of elevated temperature during high-temperature oxidation process. The oxidation rate increases rapidly at temperature above 850 ℃. When the temperature of oxidation scale cools to 700 ℃, the FeO becomes unstable and the single phase Fe3O4 precipitates from FeO phase, reducing the formation of eutectoid FeO in the next step. Thus, the percentage of eutectoid α-Fe＋Fe3O4 also reduces.

关 键 词：高碳钢线材 高温氧化 氧化铁皮厚度 先共析反应 

分 类 号：TG156.1[金属学及工艺—热处理]