20mm high chromium grinding steel ball / ball mill balls

 

Ball mill balls Information
1. Standard: GB8649-88 and YB/T 091-2005
2. Diameter: 20-130mm
3. Surface Hardness: 57-67HRC
4. Impact Strength: more than 12J/cm2
5. Strict with inspection and testing

 

Ball mill balls Advantage:

1. High whole hardness, and the hardness gradient is uniform.

2. High notched .bar impact strength.

3. Low breakage rate

4. Low-cost and stable quality

5. Not easy to crush and out of round.

 Ball mill balls manufacturing processing

1.   The blank used for producing the grinding steel balls is hot rolled bar with various kinds of chemical composition. Its diameter is the same as the nominal diameter of steel ball.
2.   Before getting rolled, bars are reheated to a proper temperature in a continuous reheation furnace.
3.   After a red hot bar is conveyed into the skew rolling mill, it rotates forward between two rolls with special spiral passes. As this process continues, it is gradually rolled into steel balls. A single skew rolling mill can produce 60-360 steel balls per minute.
4.  And then, the hot steel balls are transported directly to the online heat treatment equipment, designed specially for quenching and tempering. Steel balls can obtain very high and uniform hardness.
5.   Finished steel balls characterized by the precise dimension and geometry, better wearibility and mechanical properties.
6. The products which passed inspection are transported to the finished product storehouse and then delivered to customers after being packed. 

 

Packaging & shipping of ball mill balls

High quality carbon and steel bars are used in our plant to produce grinding steel ball. After being rolled, red hot steel ball are conveyed into special heat treating equipment at once for online heat treatment. By doing so, homogeneous hardness and better wearablilty can be obtained. In addition, steel balls can be reheated in our heat treating workshop according to particular requirement.

Average surface hardness

  Those who were produced with the " haverage surface hardness" are characterized by its harder surface, larger and softer core as well as good elasticity and anticracking features. Normally the diameter rang of this kind of product is 60-130mm.

  Product grades and hardness values are as follows:

    

Grades	The average surface hardness
LTB45	45-65HRC
LTB35	35-50HRC

 

Company Information

ZhangQiu LongTeng  Cement Machinery Making Co., Ltd.  has become one of the new domestic cement equipment and mining equipment manufacturing enterprises after constructing and developing for 40 years .