Boss consulting, stamping 0.35 mm 65 manganese steel soft material, the current upper punch is irregular, with DC53 to do 100,000 strokes a day, grinding a punch can be rushed to almost 1.5 million times. The high-speed steel SKH-55 for the lower die insert can be used for more than 5 million times at the edge of the maintenance knife.
Occasionally, due to stacking, the mold is not smooth, and the mold has the problem of collapse. Now if you want to further improve the durability of the mold, it is best to repair the mold in a month or two, what else is the mold steel recommended? Is it OK to use tungsten steel? [Yuhui Mould Steel Huang Zipeng's Diary No. 772]
DC53 is one of the most commonly used cold work die steels, the hardness can be stable up to HRC60-62, the wear resistance is 3-6 times that of Cr12MoV, the toughness is twice that of SKD11, and it also has good anti-sticking properties.
At present, I can stamping more than 1 million before repairing once, and I think the life span is already very good.
If you want to increase the service life, you need to use a tool steel with higher hardness. Because the boss's punch is a special-shaped part, the thin-walled and arc-shaped punch still has requirements for toughness, impact, and sometimes collapses a little, so tungsten steel is not recommended.
For stamping die steel with high durability requirements, powder high-speed steel PM23 is recommended.
Ordinary high-speed steel is formed by the melting and casting process, the carbide particles are relatively large, and the smelting process and forging process are not in place of the high-speed steel, which is also prone to the problem of carbide segregation, and there are many microscopic microscopic microcracks in the steel that are invisible to the naked eye.
Powder high-speed steel is atomized and sprayed, quickly cooled into fine powder, and then sintered into high temperature and high pressure, so there is no problem of carbide segregation, and the grain size is fine and evenly distributed, so the anti-cracking performance and anti-sticking performance are greatly improved.
The wear resistance and toughness of powder high-speed steel PM23 are 2-3 times that of high-speed steel SKH-9, and the hardness can reach HRC 64-66, with high hardness and toughness, the mold will not stick to the material, and the comprehensive performance is good, and it is also the most commonly used high-hardness powder high-speed steel in the stamping industry.
Before, it was used to make a high-speed punching die of 1.45 mm H62 brass strip, and the bottom die should be stamped with a round hole of 3 mm, with a punching speed of 300 times per minute, and when DC53 was used, it would be seriously worn out after 300,000 punches, and a lot of copper powder would be stuck near the knife edge of the bottom die.
After switching to Yuhui powder high-speed steel PM23, it can be stamped up to 950,000 times before the knife edge needs to be sharpened, and the service life is increased by 3 times. The overall efficiency of the workshop has improved.
Including doing some hardened 65 manganese steel stamping, arc punches with DC53 and high-speed steel SKH-51 are easy to wear or chipping, but also to replace powder high-speed steel PM23 to solve.
The knife edge of the bottom die is high-speed steel SKH-55, which is a cobalt-containing high-speed steel, and the hardness of the mold can reach about HRC65, in fact, it is already very durable. If you want to improve the life, you can use high-carbon and high-vanadium powder high-speed steel PM53 and PM60, which have high carbide content and are more wear-resistant.
I am Huang Zipeng, from Liaobu, Dongguan. Yuhui die steel, 3 of the world's top 500 are in use, Kyocera has purchased for 7 consecutive years.
If the boss in front of the screen also has a similar working condition of stamping 0.35 mm 65 manganese steel soft material DC53 punch with a life of 1.5 million times, you can also come to Yuhui die steel Huang Zipeng to try it.