φ45mm轴承钢预穿水冷却工艺研究  

Research on Pre-water Cooling Process of φ45 mm Bearing Steel

作　　者：黄贞益[1] 任洪敏[1] 邵仁志 柳国徽 章小峰[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]南京钢铁股份有限公司棒材厂,江苏南京210035

出　　处：《热加工工艺》2014年第15期110-113,共4页Hot Working Technology

基　　金：轧制技术及连轧自动化国家重点实验室开放课题项目(2009002);国家自然科学基金资助项目(51275003)

摘　　要：针对某厂现有的轧后控冷技术不能有效控制大规格轴承钢棒材中的网碳问题,通过增加预穿水冷却水箱,并结合轧后控冷来实现对网碳的有效控制。为了制定合理的预穿水冷却工艺,首先借助有限元模拟软件Marc对φ45mm轴承钢在预穿水阶段的温度场进行了模拟,然后根据模拟结果进行了轧制工业试验。结果表明:在大规格轴承钢生产过程中,增加预穿水冷却,调整其工艺参数,可以实现低温轧制,有效抑制碳化物析出,钢中碳化物网状级别随穿水水压的增加而降低。当控轧水压为0.4 MPa时,心部和近表面1/4处的网碳级别分别为2.0和1.5,满足用户的要求。Aiming at the problem of network carbide in large-size beating steel bars which could not be effectively controlled with the existing controlled cooling technology at a plant, through using a pre-water cooling box and combined with controlled cooling after rolling, the network carbide was effectively controlled. In order to establish a reasonable pre-water cooling technology, firstly, the temperature field of q545 mm beating steel in the stage of pre-water cooling was simulated by using finite element simulation software Marc, and then rolling industrial test was performed according to simulation results. The results indicate that： in the production of large-size beating steel, using pre-water cooling box and adjusting its process parameters can achieve the low temperature rolling. Moreover, carbide precipitation is effectively restrained and the grade of the network carbide in the steel decreases with water pressure increasing. When the water pressure is 0.4MPa, the grade of the network carbide at core part is 2.0 and near quarter surface is 1.5, which meets the requirements of users.

关 键 词：轴承钢 网碳 预穿水工艺 温度场模拟 MARC 

分 类 号：TG335[金属学及工艺—金属压力加工] TG142.41[一般工业技术—材料科学与工程]