高铬复合铸铁轧辊的研制
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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。
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.
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。
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.
引文
[1]文铁铮,郭玉珍.冶金轧辊技术特性概论[J].石家庄:河北科学技术出版社,1995,3(2):109-117.
[2]F.Maratray,R.Usseglio-Nanot.Factors Affecting the Structure of Chromium and Chromium-Molybdenum White irons.Climax Molybdenum Co,1970.
[3]特许昭.高铬铸铁工作辊[J].北京:机械工业出版社,2000,4(2):26-31.
[4]川岛诚.用高铬铸铁制造料钟铸物[J].材料热处理学报,1977,4(3):59-68.
[5]陆文华.铸铁及其熔炼[J].北京:机械工业出版社,1988,5(1):85-89.
[6]陈憬琚,余自更等.合金高铬铸铁及其应用[J].北京:机械工业出版社,1999,47(3):96-102.
[7]J.L.Parks.Charateristics of As-Cast and Subcritically Heat-Treated High-Chromium-Molybdenum White Irons for Thick-Section Castings,AFS Transactions,1978,(86):93-102.
[8]周继扬.铸铁彩色金相学[J].北京:机械工业出版社,2002,18(8):78-84.
[9]王文才等.Si/C和冷却速度对中铬铸铁态组织性能的影响[J].铸造,2001,51(1):20-21.
[10]艾忠诚,刘娜等.高硬度高铬复合铸铁轧辊的研制[J].铸造,2007,(02).
[11]高文理,黄雅妮等.固液混合铸造对高铬铸铁抗拉强度的影响[J].湖南大学学报(自然科学版),2006,(04):15-16.
[12]孙智刚,高伟,肖福仁等.石墨及碳化物对高镍铬无限冷硬铸铁轧辊耐磨性的影响[J].材料热处理学报,2007,(S1):23-29.
[13]彭晓春,张长军.27%Cr高铬铸铁组织及性能研究[J].机械工程材料,2005,(11):55-59.
[14]赵中玲.高铬铸铁磨损性能的研究[J].黑龙江交通科技,2007,(05): 86-88.
[15]欧阳安,黄安国,王长贵等.高镍铬铸铁轧辊材料激光相变组织与耐磨性研究[J].电焊机,2007,(08):34-36.
[16]秦紫瑞,孙连春,李隆盛,高碳高铬铸铁的组织及其磨蚀行为研究[J].钢铁,1995,(11):9-11.
[17]焦金玲.轧辊用高速钢复合变质及热处理工艺研究[D].山东大学,2007,5(2):25-27.
[18]王贵明.铸造复合轧辊的几种新方法[J].特种铸造及有色合金,1999,(04):33-36.
[19]孙以容.21世纪轧辊技术发展趋势[J].宝钢技术,1996,(05):22-26.
[20]宫开令.高速钢轧辊特点及其在热带钢轧机上的应用[J].轧钢,1996,(06):16-26.
[21]于新泉.复合轧辊用高速钢显微组织及性能的研究[D].郑州大学,2002,5(5):56-57.
[22]郭志群,刘均海等.轧辊(辊环)材料的发展与应用[J].上海金属,2004,(05):31-38.
[23]蔡影祥.铸造高速钢轧辊的成分设计与热处理[D].辽宁工程技术大学,2003,3(1):22-25.
[24]熊运昌,梁秀山,杨凌平.热轧辊的选材及热处理[J].机械研究与应用,2002,(01):22-29.
[2]F.Maratray,R.Usseglio-Nanot.Factors Affecting the Structure of Chromium and Chromium-Molybdenum White irons.Climax Molybdenum Co,1970.
[3]特许昭.高铬铸铁工作辊[J].北京:机械工业出版社,2000,4(2):26-31.
[4]川岛诚.用高铬铸铁制造料钟铸物[J].材料热处理学报,1977,4(3):59-68.
[5]陆文华.铸铁及其熔炼[J].北京:机械工业出版社,1988,5(1):85-89.
[6]陈憬琚,余自更等.合金高铬铸铁及其应用[J].北京:机械工业出版社,1999,47(3):96-102.
[7]J.L.Parks.Charateristics of As-Cast and Subcritically Heat-Treated High-Chromium-Molybdenum White Irons for Thick-Section Castings,AFS Transactions,1978,(86):93-102.
[8]周继扬.铸铁彩色金相学[J].北京:机械工业出版社,2002,18(8):78-84.
[9]王文才等.Si/C和冷却速度对中铬铸铁态组织性能的影响[J].铸造,2001,51(1):20-21.
[10]艾忠诚,刘娜等.高硬度高铬复合铸铁轧辊的研制[J].铸造,2007,(02).
[11]高文理,黄雅妮等.固液混合铸造对高铬铸铁抗拉强度的影响[J].湖南大学学报(自然科学版),2006,(04):15-16.
[12]孙智刚,高伟,肖福仁等.石墨及碳化物对高镍铬无限冷硬铸铁轧辊耐磨性的影响[J].材料热处理学报,2007,(S1):23-29.
[13]彭晓春,张长军.27%Cr高铬铸铁组织及性能研究[J].机械工程材料,2005,(11):55-59.
[14]赵中玲.高铬铸铁磨损性能的研究[J].黑龙江交通科技,2007,(05): 86-88.
[15]欧阳安,黄安国,王长贵等.高镍铬铸铁轧辊材料激光相变组织与耐磨性研究[J].电焊机,2007,(08):34-36.
[16]秦紫瑞,孙连春,李隆盛,高碳高铬铸铁的组织及其磨蚀行为研究[J].钢铁,1995,(11):9-11.
[17]焦金玲.轧辊用高速钢复合变质及热处理工艺研究[D].山东大学,2007,5(2):25-27.
[18]王贵明.铸造复合轧辊的几种新方法[J].特种铸造及有色合金,1999,(04):33-36.
[19]孙以容.21世纪轧辊技术发展趋势[J].宝钢技术,1996,(05):22-26.
[20]宫开令.高速钢轧辊特点及其在热带钢轧机上的应用[J].轧钢,1996,(06):16-26.
[21]于新泉.复合轧辊用高速钢显微组织及性能的研究[D].郑州大学,2002,5(5):56-57.
[22]郭志群,刘均海等.轧辊(辊环)材料的发展与应用[J].上海金属,2004,(05):31-38.
[23]蔡影祥.铸造高速钢轧辊的成分设计与热处理[D].辽宁工程技术大学,2003,3(1):22-25.
[24]熊运昌,梁秀山,杨凌平.热轧辊的选材及热处理[J].机械研究与应用,2002,(01):22-29.