Forged Grinding Ball with Excellent Quality

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200000M.T./Year /month

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Product Description:

Features of Forged Grinding Ball with Excellent Quality:

1) Size:20-150mm
2) Hardness:55-65
3)Certificate:ISO9001:2008
4)Performance: Unbreakable

Chemical Composition of Forged Grinding Ball with Excellent Quality:

Chemical elements of forged steel balls

C

Si

Mn

Cr

S

P

0.50-0.65

0.15-0.37

0.6-1.2

≤0.25

≤0.04

≤0.04

0.7-0.9

0.45-0.75

0.7-1.25

0.11-0.4

≤0.04

≤0.04

 

Technical Parameters of Forged Grinding Ball with Excellent Quality:

Nominal diameter

Diameteical

Tolerance

Weight of single ball in

average

Surface

hardness

Impact

toughness

(mm)

(mm)

(g)

(HRC)

(j/cm)

Φ20

+2 -1

32

50-65

≥12

Φ25

+2   -1

64

50-65

≥12

Φ30

+2   -1

110

50-65

≥12

Φ40

+2   -1

263

50-65

≥12

Φ50

+2   -1

513

50-65

≥12

Φ60

+3   -2

888

50-65

≥12

Φ70

1410

Φ80

2104

Φ90

2996

Φ100

4110

Φ110

+4 -2

5457

50-65

Φ120

7102

Φ130

9030

Φ140

+4   -3

11278

50-65

Φ150

13871

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Q:What should I pay attention to when designing a casting structure?
1 of the casting in metal mold cooling was faster than sand, metal type and let, thus casting in metal mold casting, casting stress generated in the ratio of sand casting to crack tendency is also large, but also prone to misrun and cold lap, white (for casting casting). Defect. Usually: (1) in the prevention of metal casting casting crack aspect should pay attention to the following problems: the structure of A in wall thickness, wall transition and connection to the ease, corner fillet appropriate requirements such as should be more strict than sand casting; B should be connected vertically connected with the wall to tilt C; for the weak parts of the structure should be set to strengthen ribs, bosses, to prevent casting; D should minimize the obstacle free shrinkage of the boss, casting rib, flange and other prominent part; E in the casting arrangement of ribs, but also should consider its influence on the casting shrinkage.
Q:What are the casting parts tested?
The surface brightness, appearance, size, chemical composition, weight, material, surface defects, internal defects, seals need to be checked, leakage, etc.
Q:Where is the precision casting factory?
Shandong, DongyingThe birthplace of precision casting
Q:What kind of flaw detector is better for casting parts?
Casting using the detector test, you must first determine the detection process, such as the detection of surface and near surface crack defects, such as casting, recommended by CYD-3000, or CYD-5000 mobile magnetic testing machine for testing.
Q:What is the difference between the casting drawing and the car work drawing?
Casting rough drawings generally no processing symbols, processing drawings indispensable is processing symbols!
Q:How can the casting be plated with ordinary zinc plating? The coating is too thin and requires 0.08 thickness
Hot galvanizing doesn't seem to workThe zinc layer is 275g/ square meters of material coating is 0.019mm (mm), up to 0.08 thick.
Q:What is normalizing, annealing, tempering, quenching? What is the difference between forging parts and casting parts?
The aim is to make the grain fine and distribute the carbide evenly. The difference between normalizing and annealing is that normalizing cooling rate is slightly faster than annealing cooling rate, so normalizing structure is finer than annealing structure, and its mechanical properties are also improved. In addition, normalizing furnace cooling does not occupy equipment and has higher productivity. Therefore, normalizing may be used instead of annealing as much as possible. The main application areas of normalizing are as follows: for low carbon steel, after normalizing, the hardness is slightly higher than that of annealing, and the toughness is better. It can be used as the pretreatment of cutting. Used for medium carbon steel, instead of quenching and tempering, as the final heat treatment, or as an induction heating method before surface hardening. Used for tool steel, bearing steel, carburizing steel, etc., it can eliminate or restrain the formation of network carbide, so as to obtain the good organization of spheroidizing annealing. For cast steel, the microstructure can be refined and the machinability can be improved. Used for large forgings, which can be used as final heat treatment, so as to avoid larger cracking tendency during quenching.
Q:In theory, which is more expensive, forging parts or casting parts?
The structure of the casting is relatively flexible in design, and the modeling is easy to realize.
Q:How can the casting be free of trachoma?
Measures for the prevention of trachoma in castings:1, sand compaction to high, paint two times;
Q:Selection of hydraulic press is the casting parts and steel plate welding, how to choose?
Casting parts in one shape, the overall processing in this regard than steel plate welding better. The same price is much more expensive than steel. Large hydraulic presses seldom have casting parts.

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