A2 Introduction
A2 is higher than the hardness after heat treatment SKD11, high temperature (500-520 ℃) ​​after tempering up to 60-62HRC hardness, in intensity over SKD11.
2, the tenacity is SKD11 twice. Toughness of A2 tool steel in the cold is more prominent, therefore, made with A2 few cracks and crack, greatly improving the service life.
3, after line cutting residual stress, high temperature annealing reduces the residual stress. Therefore, the requirements of large-scale precision die and mold line of the crack after cutting and deformation to be curtailed.
4, cutting more than SKD11. A2 is better than cutting SDK11. Therefore, the use of A2 increase tool life and reduce the manufacturing processes. Purpose: mold planted red / cold mold / cold-drawn mold / molding roll / punch / wire cutting uses a variety of fine blanking and stamping mold / plastic deformation of materials difficult to machine tools.
Practical features:
(1) is cutting, grinding was good. By cutting, abrasive are better than SKD11 was excellent, so the processing tool life longer processing time than the number of provinces.
(2) heat treatment on the merits than the SKD11 hardened high, so we can improve the hardness of the vacuum heat treatment, lack of defects.
(3) the advantages of on-line cutting through the high-temperature tempering reduces residual stress and the elimination of residual austenite, to prevent the wire cutting cracks, deformation of the problems.
(4) the advantages of surface hardening on the surface hardness of the surface hardening treatment than SKD11 high, it can improve mold performance.
(5) repair welding operations on the merits because, after preheating and heating temperature than SKD11 low, so relatively easy to repair welding operations. Features: Common cold die steel, high hardness, high toughness.
Use
● precision stamping die.
● Line of Precision Die cutting and stamping dies for various purposes.
● difficult to machine materials, plastic deformation tools.
● forging, deep drawing and Roll with mold.
Other
● High-speed blanking punch, stainless steel punch.
● tensile modulus, crimping die, embossing die, wear plastic molding.
● Factory state: HB230-250
Chemical composition
Carbon C: 0.95 ~ 1.05
Si Si: 0.20 ~ 0.40
Manganese Mn: 0.45 ~ 0.75
Chromium Cr: 4.75 ~ 5.00
Mo Mo: 2.00
Vanadium V: 0.28