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Continuous hard treatment

Hardened and Tempered Steel Strip
Cgoodsteel`s hardening and tempering process involves heating the steel strip to a critical transition temperature above a given level and then rapidly cooling it. The steel strip in this case is very brittle and is then heated to the lowest temperature and maintained at a given temperature for a given period of time. This process is to avoid oxidation in an inert atmosphere.
 
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Product Description
1:Hardened and Tempered Steel Strip
1.Equipment: 13 heat treatment furnaces: 
1 wiper production line (the first domestic high-end production line)
2 lead quenching furnaces
9 ordinary heat treatment furnaces
2.Production capacity  1500Ton/per month
3.Customized production, 500KG can be ordered
4.Guarantee shipment with invoice and source of raw materials
5.Packaging specification (outer packaging is labeled according to customer requirements)
 
2:The Mechanical behavior of Hardened and Tempered Steel strip
1)Hardness: 38-53hrc (according to customer requirements)
2)High Tensile strength  ≥1100-1800Mpa
3)Surface: blue, polish, yellow, white
 
3:The specification of Hardened and tempered
Grade:CK45 CK50 CK55 CK60 CK67 CK75 SK5 SK85 51CrV4, 60Si2Mn, 420J2, T8, T10A 
Thickness:0.10mm-3.00mm
Width:2mm-300mm
Hardness: 38-53hrc
Surface: blue, yellow, white, polish
Edge:slit, rounded, square
 
4:TSurface finish
 
Heat treated steel strip surface color
 
5:Edge processing
 
Heat treatment steel strip edge treatment process
 
6:Thickness and Width tolerance
Thickness/mm Standard Tolerance +/-mm
  Industry tolerance Enterprise tolerance
<0.25 +/-0.020 +/-0.015
0.25-0.40 +/-0.025 +/-0.020
0.40-0.60 +/-0.030 +/-0.025
0.60-0.90 +/-0.035 +/-0.030
0.90-120 +/-0.045 +/-0.040
1.20-1.60 +/-0.055 +/-0.050
1.60-2.10 +/-0.060 +/-0.055
2.1.0-2.60 +/-0.065 +/-0.060
2.60-3.20 +/-0.070 +/-0.065
3.20-4.00 +/-0.075 +/-0.070

 

Thickness / mm Width tolerance mm
<50 50-100 100-200 200-320
Enterprise tolerance
<0.30 +/-0.30 +/-0.35 - -
0.30-0.60 +/-0.20 +/-0.30 +/-0.50 +/-0.80
0.60-1.20 +/-0.20 +/-0.25 +/-0.50 +/-0.80
1.20-1.60 +/-0.20 +/-0.25 +/-0.50 +/-0.80
1.60-3.20 +/-0.20 +/-0.25 +/-0.50  +/-0.80

 

Thickness / mm Width tolerance mm
<50 50-100 100-200 200-320
Enterprise tolerance
<0.30 +/-0.35 +/-0.40 - -
0.30-0.60 +/-0.25 +/-0.35 +/-0.55 +/-0.85
0.60-1.20 +/-0.25 +/-0.30 +/-0.55 +/-0.85
1.20-1.60 +/-0.25 +/-0.30 +/-0.55 +/-0.85
1.60-3.20 +/-0.25 +/-0.30 +/-0.55  +/-0.85
 
7:Tolerance on flatness
 
The unflatness across the strip (also called cross camber and cross bow) is expressed as a percentage of the strip width.
The unflatness along the strip, sometimes called coil-set, is also expressed as a percentage. Unless otherwise agreed upon the measuring length = the strip width for flatness measurements along and across the strip. Influence of possible residual stresses from slitting shall be excluded.
 
Tolerance

Maximum permitted deviation class (% of nominal strip width)

P0 -
P1 0.4
P2 0.3
P3 0.2
P4 0.1
P5 As per customer`s special requirement

 

Tolerance class Strip Width
8 - (20) mm 20 - (50) mm 50 - (125) mm 125mm~
Measuring length
1m 3m 1m 3m 1m 3m 1m 3m
Maximum allowed straightness deviation (mm)
R1 5 45 3.5 31.5 2.5 22.5 2 18
R2 2 18 1.5 13.5 1.25 11.3 1 9
R3 1.5 13.5 1 9 0.8 7.2 0.5 4.5
R4 1 9 0.7 6.3 0.5 4.5 0.3 2.7
R9                
 
Sickle BayPut the steel belt on the inspection platform, in a free state, measure with a vernier ruler and a tightly tightened wire, and take the maximum value

sickle bay
 
S-shaped curvedPut steel strip inspection platform, is under a free state, the 100 mm length of flat feet on blade s-shaped curved parts, with a feeler, get the maximum value.
 
S-shaped bend-Heat treated steel strip shape
 
1)An S-shaped bend is allowed within the minimum length of the steel strip, and the tolerance shall not be greater than 0.5mm/m.。
2)Surface roughness of steel strip R, value not greater than 1.6µm
3)No cracks in the steel strip
 
Horizontal straightness Sickle bend
Width Tolerance Width Measuring length Tolerance
≤50 0.20 >25 7500 18
>50-100 0.40 >25-100 15
>100-150 0.60 >100-150 8500 12
>150 0.80 >150 12500 18
 
Tolerance on Straightness
Straightness deviation is specified in millimeters and defined as lateral deviation of the edge from a straight line as shown in the graphic.
The straightness deviation is stated as edge camber(bow) and measured over a strip length of 1 or 3 meters. Straightness tolerance depends on the strip width and is given as one of five straightness classification groups (R).
 

Heat treated steel stripTolerance on Straightness

 
8:The Application of Hardened and Tempered Steel Strip
1.Band saw blades/blades :
 
Band saw blades/blades
 
Grade: C67S,C75S,SK5,C75Cr1,51CrV4,75Ni8,AISI420J2
Width: 6-260mm,
Thickness: 0.4-1.83mm.
 
Cutting meat band saw blades:0.56*12.7/16/19mm
Cutting wood band saw blades:
0.5-0.9*25.4-38mm
1.0 /1.07/1.1*32/38/40/45mm 
1.2-1.67* 101-265mm
Other more size requirements can be produced according to customer requirements.
        
2.Rolling Shutter Spring:
 
Rolling Shutter Spring

Grade: C67S,C75S,C80S
Size:1.0*30/40/45/50/55/60mm
1.2*40/45/50/55/60mm
1.3*40/45/50/55/60mm
1.4*40/45/50/55/60mm
1.5*40/45/50/55/60mm
1.6*40/45/50/55/60mm
Other more size requirements can be produced according to customer requirements.
 
3.Construction blades:

Construction blades

Grade: C67S,C75S,SS420J2
Size: 0.4/0.5/0.6*100-120mm
Other more size requirements can be produced according to customer requirements.
 
4.Kind of spring

Kind of spring
 
Grade: C67S,C75S  
Size: According to customer requirements.
 
5.Auto components

Auto components
 
Grade:C67S,C75S,51CRV4,SK5
Size: According to customer requirements.
 
6.Blade: 

Blade
 
Grade: C67S,C75S,SS420J2
Size:According to customer requirements.
 
7.Knife
 
Knife
 
Grade: C67S,C75S,SK5,SS420J2
Size: According to customer requirements.
 
8.Shoe accessories 
 
Shoe accessories
 
Can be worn up to 100,000 times
Grade: C67S,C75S,SS420J2  
Size:According to customer requirements.
 
9.Rice cooker gasket
 
Rice cooker gasket
 
Grade: C67S, C75S
Size:According to customer requirements.
 
10.Ehicles, electric vehicles/battery vehicles/car
 
.Ehicles, electric vehicles/battery vehicles/car
 
Grade:  C67S, C75S
Size:  According to customer requirements.
 
11.Scraper
 
Scraper
 
Paint, shoe use, dust scraping
Grade: C67S,C75S
Size: According to customer requirements.
 
12.Woodworking scraper
 
Woodworking scraper
 
Grade: C67S,C75S
Size: 0.82*65*128mm
0.82*52*148mm
0.82*80*120mm 
Other more size requirements can be produced according to customer requirements.
 
9:Packing
Each coil is light oiled and then wrapped in plastic film and anti-rust paper and put into 20ft container for standard sea worthy
 
steel strip Packing

 

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