Tube Mill Mould for tube mill line for making steel tubes

Main process description:

● Raw material preparation

— Select electric arc furnace smelting which is better than conventional electric furnace

— Extract sulfur and phosphorus, a harmful component in molten steel, and control other components within the scope of national standards

— The electroslag remelting process increases the structure density of the steel and reduces the impurity content of the steel, making the structure more uniform and enhancing the mechanical properties

— One-piece reforging to solve the problem of looseness inside the raw material and improvement of carbides and uneven distribution

— Spheroidizing annealing to obtain a structure of spherical or granular carbides uniformly distributed on the ferrite matrix

● Heat treatment is one of the most critical processes in the whole roll manufacturing process. It plays a vital role in improving the overall performance of the roll. According to the different areas and functions of the roll, our company adopts different heat treatment methods to exert the best effect.

■ Primary hardening method: general rolls in supply

—Professional furnace loading rack and correct furnace loading method to prevent deformation of the workpiece during heating

— Reasonable heating method and temperature control

- Heating in a controlled protective gas to prevent oxidation and decarburization

- Using segmented pre-heating to reduce internal stress and prevent cracking

- 860°C preheating, 1020°C heating.

- The heating time is based on the effective thickness of the workpiece to be processed, one minute per millimeter of heat preservation

- Strictly control the heating temperature to prevent overheating or insufficient heating

- Thyristor controls the heating, and the square circle chart monitors the process execution

- Oil cooling and quenching, controlled by an infrared thermometer to ensure the oil outlet temperature and meet the process requirements

- Tempering three times at 180℃～200℃ in the tempering furnace to eliminate stress, complete the transformation of internal structure, and meet the hardness requirements of the drawings

- For special positions, after confirmation by both parties, the hardness can be adjusted appropriately to prevent edge collapse

● Machining is done in strict accordance with the drawings to ensure the dimensional accuracy and surface roughness of the rolls

— Mandrel clamping is used for finishing to ensure the shape tolerance of the workpiece

— CNC lathe precision model surface, to ensure the roughness of the pass

— The keyway is machined by wire cutting to ensure the machining accuracy of the keyway

Our Spare Parts Apply:

1. Roller, Mould, Cr12, Cr12Mov material, D2,D3 material

2. Ferrite, Impeder, Fiberglass tube

3. HSS saw blades, TCT Saw blades, Friction saw blades

4. OD burr remove inserts, ID burr remover inserts

5. HF welder Induction Coil and other HF welder spare parts

6. Copper tube for induction Coil, PTFE pipe for Induction Coil

7. Mosfet, Boards

8. Steel pipe Strapping machine

9. Zinc Spray Machine, Zinc wire, Zinc spray gun

Why Choose Us?

Leading Technology, Reliable Quality, Excellent Service!

Optimized Design, High quality material select! 

Heat treatment process guarantee!

Spiral bevel gear, drum gear coupling and carburization.

Gear teeth quenching.

Driven system stable, efficient and wearable with lower noise.

High precision wear resisting and Long life of rollers.

All the machine Lathes, Key Grooves are positioned and Milled by CNC.