共查询到19条相似文献,搜索用时 140 毫秒
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国外高速钢复合轧辊研究的进展 总被引:29,自引:5,他引:24
简述了国外高速钢复合轧辊的研究进程及其在轧钢行业的应用现状,介绍了国外高速钢复合轧辊的制造方法,并对各种制造方法的特点进行了比较,通过总结国外高速钢复合轧辊的经验,作为借鉴,以利于我国早日开发出性能优良的高速钢复合轧辊。 相似文献
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分析了高速钢轧辊的技术发展趋势及高硼低合金高速钢复合铸造工艺试验、技术路线和复合轧辊开发思路,设计了高硼低合金高速钢复合轧辊材质开发的实验方法。 相似文献
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分析了高速钢轧辊的技术发展趋势及高硼低合金高速钢复合铸造工艺试验、技术路线和复合轧辊开发思路,设计了高硼低合金高速钢复合轧辊材质开发的实验方法。 相似文献
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离心铸造高速钢复合轧辊生产工艺探讨 总被引:1,自引:0,他引:1
介绍了采用卧式离心机两次复合工艺制造离心铸造高速钢复合轧辊的生产技术,重点介绍了轧辊外层、中间层及辊芯材料的化学成分、轧辊铸造的工艺流程、钢水的熔炼和处理方法、热处理工艺及组织性能.该轧辊具有耐磨性高、辊身工作层硬度落差小等特点,其耐磨性是传统铸铁轧辊的3倍以上. 相似文献
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近年来,广泛推广使用高速钢轧辊作为热带精轧机的工作辊。但,高速钢轧辊与高合金麻口细晶铸铁轧辊相比,存在轧制负荷较大时易产生粘辊的问题。最近,日本久保田公司轧辊研究部以开发兼有高速钢轧辊的耐磨性和高合金麻口细晶铸铁轧辊的优良耐粘辑性作为目标,研制成功一种新的高耐磨性轧辊。这种轧辊具有高碳高速钢材质所含有的高硬度MC型碳化物(特别是VC碳化物)和石墨。该公司制造出这种轧辊应用于带钢热轧机。①该公司用水平式离心铸造机制造了外层为新开发材料、内层为球墨铸铁的复合轧辊,将它进行高温淬火、回火处理后,可得到… 相似文献
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在简单介绍了高速钢轧辊特点和应用现状基础上,对高速钢轧辊成形技术,特别是高速钢轧辊离心复合铸造技术进行了详细讨论,同时介绍了热处理对高速钢轧辊组织和性能的影响,最后提出了开展高速钢轧辊制造技术研究值得重视的一些问题. 相似文献
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High speed steel (HSS) rolls can replace traditional rolls such as alloyed cast iron rolls and powder metallurgical (PM) hard alloy rolls. The main reasons for the replacement are that the wear resistance of low-cost alloyed cast iron rolls is poor and the cost of high-quality PM hard alloy rolls is very high. By means of centrifugal casting, HSS rolls having excellent wear resistance have been manufactured. The hardness of the HSS roll is 65~ 67 HRC, the range of variation is smaller than 2 HRC and its impact toughness is 15 J/cm2. The wear rate of HSS rolls used in the pre-finishing stands of high-speed hot wire-rod rolling mill reaches 2.5 × 10-4 mm per ton steel. Furthermore, the manufacturing cost of HSS rolls is significantly lower than that of PM hard alloy rolls; it is only 30 percent of that of PM hard alloy rolls. 相似文献
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通过对轧辊用高速钢进行复合变质及热处理。探讨了含碱金属K/Na以及V、Mo合金元素的变质剂的加入量对轧辊用铸造高速钢共晶组织的影响。试验结果表明:在1.0%范围内,随着复合变质剂含量的逐渐增加,共晶碳化物的形貌和分布得到了改善,晶粒得到细化,分布趋于均匀,轧辊用高速钢的硬度略有下降,但韧性有很大提高。变质剂含量继续增加,组织和性能没有明显改善。进一步分析表明:变质剂中的合金元素可促进在晶粒中或沿晶界均匀分布的非连续状硬质碳化物的生成.从而达到改善组织、提高力学性能的作用。 相似文献
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Zhang Xipeng Kou Guojun Wu Chunjing Gan Zhaiping Zhao Wanzi Chuan Xiangzhao Ma Ye 《中国铸造》2008,5(2):95-98
The effect of ferrovanadium inoculation on the microstructure and properties of high speed steel (HSS) used for rolls was studied. The results showed that the as-cast eutectic carbide network tends to be broken after ferrovanadium inoculation, and the carbides are changed to rod-like or nodular shape. After heat treatment, the carbides in the inoculated HSS are spheroidized and distributed more uniformly in the matrix. The impact toughness of high speed steel with ferrovanadium inoculation is obviously improved. The action mechanism of ferrovanadium inoculation on the microstructure of the alloy is also discussed. 相似文献
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The eriect of ferrovanadium inoculation on the microstructure and properties of high speed steel (HSS)used for rolls was studied.The results showed that the as-cast eutectic carbide network tends to be broken after ferrovanadium inoculation,and the carbides are changed to rod-like or nodular shape.After heat treatment,the carbides in the inoculated HSS are spheroidized and distributed more uniformly in the matrix.The impact toughness of high speed steel with ferrovanadium inoculation is obviously improved.The action mechanism of ferrovanadium inoculation on the microstructure of the alloy is also discussed. 相似文献
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离心铸造高铬铸铁-球铁复合轧辊以w(Cr)12%-22%的高铬白口铸铁作为辊身外层材料,以高强度的球墨铸铁作为芯部和辊颈材料,采用离心复合浇注工艺生产。轧辊的非正常失效主要包括辊身剥落、辊身断裂、辊颈断裂、辊身裂纹等。对上述失效原因进行了分析,并提供了预防方法。 相似文献
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Yikun Luan Nannan Song Yunlong Bai Xiuhong Kang Dianzhong Li 《Journal of Materials Processing Technology》2010,210(3):536-541
The morphology and distribution of the eutectic carbides has an important influence on the properties of high-speed steel (HSS) rolls. Manufacturing methods reported previously have not achieved effective refinement and dispersal of the eutectic carbides. In order to investigate the effect of the solidification rate (SR) on the eutectic carbides and find a way to refine them, the morphology and distribution of the carbides has been studied systematically under various solidification rates, which were controlled by using different moulds with several initial temperatures. The morphology and distribution of the eutectic carbides was assessed by optical microscopy (OM) and scanning electron microscopy (SEM), as well as by X-ray diffraction (XRD) and X-ray energy dispersive spectrum (EDS). It was found that, with the increase of SR, the eutectic carbides became finer and more uniformly dispersed. A high SR can be recommended as a good way to improve the wear resistance and thermal fatigue properties of high-speed steel rolls. 相似文献