【作者】 杜立朝；

【导师】 张红梅；

【作者基本信息】 辽宁科技大学 ， 材料加工工程， 2008， 硕士

【摘要】 近年来,随着我国钢铁工业的持续高速发展,新建成投产的现代化连轧机的不断增加,迅速拉动了轧辊制造企业的产能扩张和技术改造。高铬复合铸铁轧辊广泛应用于热轧带钢精轧机前段,提高高铬复合铸铁轧辊的耐磨性和使用的可靠性有着重要意义。本文主要研究内容如下:1.高铬复合铸铁轧辊的研制时,采用三次浇注二次复合的方法,即在外层的高铬铸铁和芯部的球墨铸铁之间增加一个中间过渡层材质,实现了高的外层和中间层结合处抗拉强度以及高的中间层和芯部结合处抗拉强度,确保轧辊使用的安全性。2.成功地解决了外层高的反墨化元素铬向芯部球墨铸铁中的扩散,实现了芯部球墨铸铁的高强度。3.采用先进的成分设计,对外层材质及中间层材质进行有效的变质处理,材料的强度及耐磨性得到提高。4.对轧辊进行亚临界热处理或高温淬火和二次回火热处理,成功地获得了要求的辊身硬度及低的残余奥氏体含量。5.给出了高铬复合铸铁轧辊各种参数的控制方法。6.实验得出了不同回火温度对硬度的影响。7.给出了所研制轧辊的实际使用效果。更多还原

【Abstract】 In recent years, with China’s steel industry sustained high-speed development, the new completion of the modernization of the new rolling mill continues to increase, rapidly stimulating rollers manufacturing enterprises capacity expansion and technological transformation. High-chromium compound cast iron rollers are widely used in hot strip finishing mill earlier, and it is important to improve the wear resistance and the use of the reliability of High-chromium cast iron rollers. The main researches that this paper describes are as follows:1. When high chromium compound cast iron roll is developed, adopting a method of three times casting and twice times compounding. A transition layer is increased between outer high chromium cast iron and sandwich nodular iron, and achieves high tensile strength on the combination between the outer layer and middle layer, as well as the middle layer and the core of the combination’s high tensile strength, in order to ensure that the use of roller is secure.2. The problem that chromium diffusion from outer high chromium cast iron to sandwich nodular iron is successfully solved, and achieve the high strength of sandwich nodular iron.3. A advanced composition design is adopted. Tensile strength, fracture toughness and wear resistance of material is increased by effective modification in the outer layer and middle layer materials.4. Requested body roll hardness and residual austenite content are obtained successfully through subcritical heat treatment or quenching and twice tempering.5. This paper gives the methods controlling various parameters of High-chromium cast iron rollers.6. The influence rule of different tempering temperature to hardness is obtained in the research.7. The factual purpose of using the rolls is given.更多还原