Hardening line for alloy steel requirements
In order to obtain the desired flatness and tensile strength, the following raw material requirements must be met:
1. Before heat treatment, the total reduction of cold rolling of the material is more than 50%.
2. Cold rolled strip steel should be annealed and levelled.
3. Cold rolled strip steel shall not have waves, especially side waves.
4. The roughness of cold rolled strip should be less than 5µ/mm bandwidth.
5. Contour tolerance in line with relevant standards.
6. The edge of the strip should be smoothed as far as possible without burrs or cracks.
7. Uniform chemical composition, segregation according to GB/T 1299-2000 "alloy tool steel" standard requirements. No visible banding is allowed.
8. In order to ensure the quenching hardness, the depth of decarburization on the surface of the raw material shall not be greater than 1% of the strip thickness.
9. The microstructure of the strip steel should be uniform distribution of fine cementite on the ferrite matrix. Pearlite rating according to GB/ T1299-2000 "Alloy tool steel" standard 1-3; Sheet pearlite is not allowed.
10. Mesh carbide rating according to GB/ T1299-2000 "Alloy tool steel" standard 1-2.
11. Local decolorization shall not be caused by pickling or annealing.
12. Rolling lubricant/emulsion, or anti-rust oil must be cleaned (no more than 30mg/m2 on one side) so that it can evaporate during austenitizing without leaving any traces.
HOT SALES :Continuous hardening and tempering line for 420 stainless steel blade strip
This line is for continuously hardening and tempering strips of saw steel, tool steel, nife steel, spring steel, stamping steel.
Product Descrption:
1)Continuous operation;
2)online quenching tanks;
3)quenching media can be water, oil, lead;
4)PLC temperature control;
5)PLC system control;
Specification:
Type: Horizontal
Heating method: Oil, Gas, Electricity
Strip thickness: 0.1-4.5mm
Strip width: 100-750mm
Max. output: 1.2MT/hour