3mm 4mm 5mm Grade 201 Hot Rolled Stainless Steel Sheet | Stretched

What are the defects of 3mm 4mm 5mm Grade 201 Hot Rolled stainless steel sheet during the stretching process? How much do you know about this?

3mm 4mm 5mm Grade 201 Hot Rolled stainless steel sheet drawing cracking sometimes occurs after the drawing deformation, sometimes when the drawn part is withdrawn from the die; sometimes it occurs when the drawing is deformed by impact or vibration; It occurs after a period of storage or during use after drawing and deformation. The elongation rate of stainless steel is small, the modulus of elasticity is large, the hardening index is high, and the thickness anisotropy index r value is very small (stainless steel is 0.9~0.11, mild steel is 1.3~2.0). The plastic deformation stage from yielding to rupture of stainless steel is short, and its plastic strain ratio is larger than the weighted value R.

The reason for the cracking of 3mm 4mm 5mm Grade 201 Hot Rolled stainless steel sheet: austenitic stainless steel has a high cold work hardening index (stainless steel is 0.34). Austenitic stainless steel is meta-stable, and it undergoes phase transformation during deformation, which induces a martensite phase. Martensite is relatively brittle, so it is prone to cracking. During plastic deformation, as the amount of deformation increases, the content of induced martensite will also increase with the increase of the amount of deformation. The greater the residual stress, the higher the content of induced martensite phase and the resulting residual stress. The larger the size, the easier it is to crack during processing