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Main Process – Drawing Molding
Drawing plug Dice pattern
The tube drawing process is divided into three types: sinking, plug drawing, and mandrel drawing.
In the sinking, the inner wall of the tube is not supported, so the reduction of the wall is slight and the inner surface is not uniform.
Since the shear deformation at the die inlet and outlet is larger than other processes, the deformation limit is lower than other processes. When the plug is pulled out, the diameter of the inside / outside of the tube is controlled well. The plug determines the shape and roughness of the inner diameter part.
Main process – heat treatment.
After BA Interior RMAX 3.2 or less (SEM picture)
|구분||열처리 용량||최대 생산 사이즈(mm)||월 생산량 (m)||비고|
|BA 열처리 1호||150kw||100A||200,000||직관|
|BA 열처리 2호||120kw||50.8||120,000||직관|
|코일 BA 열처리||120kw||19.05||100,000||코일|
- Heat treatment furnace Outside gas: H2 (75%) + N2 (25%)
- Heat treatment furnace Internal gas: H2 (100%)
- Visible Purity: DEW POINT -40 or less
- After BA Interior Roughness: Rmax 3.2 or less
Main Process – Postprocessing
Cleaning in Clean room with 1000 class
Tube Packing in Clean Room with 1000 Class