Steel Shot for Peening Machine Chinese manufacture

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25 m.t.
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5000 m.t./month

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Steel shot and grit
Steel Shot
QB-25, QB -20, QB -17, QB -14 , QB -12 , QB -10, QB -8  QB -6,QB -5, QB -4, QB -3, QB-2
Steel grit
QG-17,QG -14,QG -12,QG -10,QG -7,QG -4,QG -3,QG -2.
wire-cut shots
0.3mm,0.4mm,0.6mm,0.8mm,1.0mm,1.2mm,1.5mm,1.7mm, 2.0mm, 2.5mm
Stainless steel shot
0.3mm,0.4mm,0.6mm,0.8mm,1.0mm,1.2mm,1.5mm,1.7mm, 2.0mm
Stainless steel cut wire shot
0.3mm,0.4mm,0.6mm,0.8mm,1.0mm,1.2mm,1.5mm,1.7mm, 2.0mm
Material selection standard
Proper hardness      Hardness for shots should be 5-10HRC higher than shot       
                    blasted material
Enough density.       Min. Density:7.4g/cm3
Proper microstructure: Tempered martensite, tempered troostite+random carbon residue
Shot blasted material condition
high quality        low cost
high speed         environment protection
Relation Between Hardness And Blasting Effect: 
Steel Shot for Peening Machine 
Relation Between Hardness And Resilience:
Steel Shot for Peening Machine        
Quality standard for steel shot and steel grit
steel shot:QB-25, QB -20, QB -17, QB -14 , QB -12 , QB -10, QB -8  QB -6,QB -5, QB -4, QB -3, QB-2.
Steel grit:QG-17,QG -14,QG -12,QG -10,QG -7,QG -4,QG -3,QG -2.
Owen life:2000-2800times
Chemical:C:0.80-1.2%   Mn:0.6-1.2%  Si:>0.40% S<0.05%   P:<0.05%
Hardness:Normal:40-50HRC (377-509HV)
Special:52-56 HRC (543-620HV)
Special:56-60 HRC (620-713HV)
We can produce the special hardness products as per the requirement of customer
Hardness tolerance:±3.0 HRC
Characteristic for steel shot and grit
High cleaning speed
QB Shot, QG Grit has the appropriate hardness, high cleaning speed, good rebound, and it can clean inside-corner or complex shape products. In that case, it can reduce processing time, increase capacity, improve production efficiency and save energy ,reduce manufacturing cost.
Long lasting and less consumption.
QB Shot, QG Grit has less internal defects. Its microstructure of tempered martensite, tempered troostite + dispersed carbide, with High impact resistance, long life. And it can reduce the load of dust collector.
With the effect of stress release and increase the strength.
QB Shot has impact internal organization, and not easily broken. It is equally located, to release the stress, and improve the surface hardness,
Strict quality management
Manufacturing process strictly enforce the IS09001: 2008 international quality system standards, with strict technology control. QC department enforce 24hour tracking monitoring for manufacturing process. All products date can be traceable.
Relation between density and worklife
Steel Shot for Peening Machine 
Hardness is proportional to blasting speed but inverse proportional to worklife. Higher hardness, faster blasting speed, but shorter life with larger consumption. Proper hardness (approx. HRC40-50) will have the most economical efficiency. The proper hardness have good rebound resilience and will clean the corners fully and reduce the working period.
Inner flaws such as air-cavity, fissure and porosity affect the worklife of abrasive and increase consumption.  
Density larger than 7.4g/cc has minimum inner defects.
Steel shot and grit selection standard 
Consumption factor
Equipment adjustment(blasting angle, distance, work piece location, air volume of dust collector, adjustment for separator)  
Blasting speed
Residual volume or corrosion grade, workpiece hardness
Cleanness grade requirement 
Arc height requirement and deforming requirement of the workpiece.
Steel shot quality

Reference table for shots size as per workpiece surface roughness

Workpiece Material shots dia.workpiece surface roughness um
Steel, stainless steel0.33.2-6.3
Inspect the shot storage inside of the shot blasting machine, and add in time, and the total adding amount should be less than 10% of the inside storage volume to ensure the stable ratio
stainless steel shot
chemical analysis
chemical analysis:3.4 austenitic type::
(C)<0.25%, (Cr)=16-18%, (Ni)=6-10%, (Si)<1%,  (Mn)<2%
430 Ferrite:(C)<0.25%,(Cr)=16-18%,(Si)<1%,  (Mn)<1%
410 martensitic:(C)<0.25%,(Cr)=11-13%,(Si)<1%,  (Mn)<1%
Microhardness:3.8-509HV ,32-50HRC 
Owen life:6500times
microstructure :304:ustenitic type,430:Ferrite,410:martensitic. Density.:7.8g/cm³

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