In recent years, high-speed steel rolls, which have been used in more than 100 sets of Bar Mills at home and abroad, have been deeply loved by the Steel Rolling Industry for their good wear resistance and high product size accuracy, and have increased the enthusiasm of roll manufacturers in developing this new product, the invention not only promotes the technical progress of the roll manufacturing industry, but also breaks the traditional pattern of the roll variety which has been maintained for several decades. Its further development willpromote the rolling mill operation rate to gradually increase and continuous improvement of rolling technology.
     However, once a product is recognized by the society, it is often accompanied by the phenomenon of fake and good, high-speed steel roll is no exception. Some roll enterprises describe the improved infinite cold hard roll as semi-high speed steel roll to sell to

customers; some roll enterprises seize the market with extremely low price when customers purchase, however, due to the insufficiency of the total alloy addition, the roller performance index is low and the wear resistance is poor, and the product used in many rolling

lines has not reached the ideal index agreed by both sides, the amount of steel rolled is even less than that of ordinary cast iron rolls. This not only causes certain economic losses to both the supply and demand sides, but also directly affects the roller user's expectation of a new product.
     The way to get out of the dilemma is to reduce the production cost and increase the benefit of the enterprise, on the other hand to maximize the surface quality and enhance the market competitiveness of the rolled products. By using high speed steel roll, not only the surface quality of the rolled material can be improved remarkably, but also the service life of the roll is long, the number of roll changes is few, and the operating rate of the mill is high, the daily output can be increased about 10% . Under normal circumstances, the control rate of negative difference stability can be increased by 1% , which greatly improves the yield rate and increases the benefit of the enterprise. Roll Die, roll grinding wheel, roll material