Forging steel ball, which is the product of steel ball by forging, is a kind of steel ball, and it is very different from casting steel ball. Therefore, it is necessary to have some familiarity with forged steel ball. And understand, in order to correctly distinguish it from the cast steel ball, and at the same time, to use this kind of steel ball correctly and reasonably.
1. Advantages of common materials for forging steel balls and forging processes
Forged steel ball, which is made of a metal material, is heated to 700 ° C - 1300 ° C, and then a certain pressure is applied to the metal blank by a forging press to cause plastic deformation, and then, Steel balls with a certain shape and mechanical properties. Therefore, the production process of this kind of steel ball can be summarized as forging, that is, forging and stamping.
The forging steel ball adopts the forging process because the forging process has some advantages in use, which can eliminate the defects such as the loose state of the as-cast state produced by the metal material in the smelting process, optimize the microstructure of the material and preserve the complete metal flow line. Therefore, a steel ball having good performance can be obtained by a forging process, and it can also be said to be a forging.
2. Forging steel ball application areas and product features
Forged steel balls, which may be wear resistant steel balls, may be used on various ball mills. In the application industry, it is in the industries and fields such as cement and thermal power, and from the current point of view, it is widely used.
The product characteristics of the forged steel ball are:
Feature 1: The breaking rate of this kind of steel ball is less than 0.5%.
Feature 2: The steel ball can withstand certain impacts because its impact toughness is greater than 18 J/cm2.
Feature 3: The overall hardness is high, the surface hardness can reach the surface hardness of 58-65HRC, the volume hardness can reach 56-63HRC, and the hardness gradient distribution is average.
Feature 4: Forged steel balls are not easily deformed and rounded during use, and their tissue density is high, which can effectively save costs.
3. Forging steel ball production process
The production process of forged steel ball is specifically: using round steel bar material and inspecting it, checking the steel ball size after no problem, the steel forging is heated to a certain temperature by the intermediate frequency furnace, so that a certain deformation occurs. The steel in the red hot state is then forged and forged using an air hammer tool. After the forging of the steel forging is completed, heat treatment is performed, mainly for quenching-tempering heat treatment, to obtain a finished steel ball, and the steel ball has a uniform hardness value.