Author: wudejian

 Mr. Cheng asked if there were any die steels he could recommend that don’t stick to the material and don’t crack. He’s currently cutting 5mm iron sheets, and using DC53 for the base plate causes sticking, resulting in burrs on the products. Coating doesn’t help either—applying a coating requires polishing the mold first, which is a…

Samuel Ullman was born in Germany and was a rabbi who emigrated to the United States to escape persecution of Jews. He was also an entrepreneur who started out selling groceries and went on to become a director of a local bank. He left behind several collections of poetry, the most famous of which is…

I opened a video platform this morning and received two pieces of news—one good and one bad. The good news was that someone complained that their molds were always breaking and asked if there was a good solution. A user commented below, saying, “@Yuhui Mold Steel—just use their steel. The quality I’ve used is excellent.”…

One user mentioned that when hot-forging stainless steel square boxes using 8418 mold steel, the mold collapses after producing 1,200–1,300 parts. Even after re-profiling the mold surface and performing stress relief treatment on the mold cavity, as well as shot peening the cavity, the mold life remains short. A single mold can be re-profiled a maximum…

 I just received an inquiry from Mr. Chen regarding the stamping of 1.7mm-thick 65Mn hardened steel for C-type retaining rings with a material hardness of 45 HRC. Currently, they are using imported PM23 powdered high-speed steel purchased from a certain online retailer for the lower die cutting edges, but the edges chip after producing only 9,000…

I received some good news from Mr. Zhang this morning. He told me that he’s now using your NAK80 for his water cups, and the results are excellent—no more fogging, and the products are crystal clear. Mr. Zhang manufactures injection-molded nylon water cups. He was previously using S136 mold steel, which costs over 40 yuan…

 A Douyin user messaged me asking: “I’ve used DC53, CALDIE, and SKH55 for the mandrel in round tube punching. After producing about 5,000 pieces, it broke. What tool steel should I use?” This type of mandrel is used for punching tubular parts. It extends into the tube but is used as a cutting edge, with…

Last night, Mr. Ke, a long-time client I hadn’t been in touch with for years, called to ask about stamping 0.5mm-thick titanium sheets with some stretching involved. He currently uses ASP60 powdered high-speed steel, but after producing just a few thousand parts, burrs start to form, and the die becomes coated with a lot of…

Yesterday, I spoke with a client who constantly felt like he was running a small workshop—as if anyone would look down on him because of his small scale. He came across as lacking in confidence. We must never think this way. To put it bluntly, those of us who run factories are experts in our…

Mr. Chen asked: “We are cutting 1mm-thick magnesium alloy profiles for solar photovoltaic products. Currently, we are using P20 mold steel, but the cutting edge wears out after only about 3,000 cuts. What type of tool steel should we use?”  The cutting edge of a solar PV panel cutter is very thin and requires extremely high…