轧辊的品种和制造工艺随冶金技术的进步和轧钢设备的演变而不断发展。中世纪轧制软的有色金属时使用强度低的灰铸铁轧辊。18世纪中叶英国掌握了轧制钢板用的冷硬铸铁轧辊的生产技术。
The variety and manufacturing process of roll h**e been developed with the progress of metallurgical technology and the evolution of steel rolling equipment. The use of low strength gray iron rolls in the Middle Ages when rolling soft nonferrous metals. In the middle of the eighteenth Century， Britain mastered the production technology of cold cast iron rolls used for rolling steel plates.
（1）堆焊前需先将轧辊辊身表面的疲劳层或缺陷，尤其是裂纹必须彻底清除；
（2）在堆焊时，为了防止裂纹的产生，朝阳sleeper，必须先加工轧辊辊身预热，预热温度根据轧辊辊及堆焊材料而定。
(1) before welding， the fatigue layer or defect of the roller body surface must be first removed， especially the crack must be thoroughly removed.
(2) in the process of surfacing， in order to prevent cracks，sleeper报价， the roller body must be pre heated，sleeper生产厂家， and the preheating temperature should be determined according to roll rolls and surfacing materials.
既避免机械加工，又无补焊热应力热影响，修正厚度也不受**，sleeper哪家好，一起产品所具有的耐磨性及金属材料不具备的退让性，确保修正部位的接触协作。
Not only to **oid mechanical processing， but also to weld hot stress and heat， the correction thickness is not bound， and the wear resistance of a product and the non - concession of metal materials are not **ailable， so as to ensure a hundred percent contact and cooperation of the corrected parts.
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