Al合金化对超高碳钢组织控制工艺的影响  

Influence of the Addition of Al on the UHCS Microstructural Heat-treatment

作　　者：李红娟[1] 王宝奇[1] 宋晓艳[2] 郭素珍[1] 谷南驹[1] 

机构地区：[1]河北工业大学材料学院,天津300132 [2]北京工业大学材料学院,北京100022

出　　处：《热加工工艺》2004年第12期13-15,18,共4页Hot Working Technology

基　　金：河北省教委博士基金资助项目(534003);河北省自然科学基金资助项目(500023)

摘　　要：制备了不同铝含量的超高碳钢,对其锻后组织进行了观察,结果表明,随着Al含量的提高,珠光体片层间距减小,相变特征温度A1b、A1e提高,Al含量(质量分数)超过1.6%时,网状碳化物析出得到有效抑制。与不含铝的超高碳钢相比,球化处理工艺简单。铝含量高于1.6%时,可以利用离异共析退火工艺或淬火回火工艺;铝含量高于2%时,可以采用简单的低温退火或淬火+高温回火进行球化处理,均可获得细小的碳化物分布于铁素体基体的均匀球化组织。Ultrahigh carbon steels (UHCS) with different contents of aluminum were prepared. It can be seen from the forged microstructure that an increase in the content of Al led to a microstructure of pearlite with small-size pearlite colony and narrow interlamellar spacing. When the content of Al was above 1.6wt%, the precipitation of carbide network was inhibited. Compared with the UHCS without Al, the spheroidizing techniques were simplified. When the content of Al was above 1.6wt%, UHCS can be processed by the divorced eutectoid annealing technique or quenching-and-tempering technique; when the content of Al was above 2wt%, UHCS can be processed by low-temperature annealing technique or quenching-and-high-tempering technique, which all can obtain the uniform spheroidal microstructure with fine ferrite grains containing fine spheroidized cementite particles.

关 键 词：Al合金化 超高碳钢 球化工艺 

分 类 号：TG142.1[一般工业技术—材料科学与工程]