硬质合金辊环广泛应用于高速线材轧机的精轧机架，以及部分高速线材轧机的预精轧机架和棒材轧机的精轧机架。硬质合金轧辊的优点是硬度高、耐磨性好，单槽轧钢量可以达到高速钢轧辊的两倍。
The cemented carbide roller ring is widely applied to the finishing mill housing of high-speed wire rod mill, as well as the finishing mill for some high speed wire rod mill and the pre finishing mill and bar mill. The biggest advantage of the hard alloy roll is high hardness and good wear resistance, and the amount of single groove rolled steel can reach two times of the high speed steel roll.
（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，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, the roller body must be pre heated, and the preheating temperature should be determined according to roll rolls and surfacing materials.
焊接时堆焊成败的关键环节，要获得理想的堆焊层必须综合考虑某些可变因素，如：焊接电压、焊接速度、轧辊转速、轧辊的保温、焊接电流、焊接材料等，对一些含碳及合金元素高的辊芯，为防止脆性区的裂纹，除一定的预热措施外，多采用低碳低合金过渡层进行预先堆焊过渡层。(4)thehardnessofthehardrollLeisabout85-100forcoldrollingmill。
In order to obtain an ideal surfacing layer, some variable factors must be cidered, such as welding voltage, welding speed, roll speed, roll insulation, welding current, welding material and so on. Some roll cores with high carbon and alloy elements, in order to prevent cracks in brittle zone, h***e to be cidered in order to obtain ideal surfacing layer. In addition, the low carbon low alloy transition layer is used to pre weld the transition layer.