Category: blog
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What type of die steel is best suited for single-step precision stamping of 8mm S500MC high-strength steel？blog 175
During the 295th live stream, a viewer asked: “What type of die steel is best for single-step precision punching of 8mm-thick S500MC high-strength steel?” Precision stamping 8mm-thick S500MC high-strength steel involves stamping thick, hard material. To ensure a bright edge, the die clearance is very small, and the material is forced in tightly. Since this…
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If you use Cr12MoV tool steel for drawing dies, the material will inevitably stick to the die and cause wire drawing—it’s a waste of money.blog 174
A word of advice to those making drawing dies: stop using Cr12MoV for drawing dies. It will inevitably cause material adhesion and stringing—there’s no fixing it. This afternoon, I received an inquiry from Mr. Liu regarding the drawing of 0.35mm-thick cold-rolled sheet. He is currently using Cr12MoV, and a small die core is sticking to…
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Buying the wrong tool steel wastes both the boss’s money and time.blog 173
This morning, Mr. Shi came to ask about punching 3mm holes in 2mm-thick 304 and 430 stainless steel. He’s currently using ASP23, but it chips easily—the punch typically breaks after about 10,000 punches. He asked me what tool steel he should use for punches designed for stainless steel. ASP23 is a powder-metallurgy high-speed steel that costs…
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Why do mold components warp and crack after heat treatment?blog 172
Mold components or workpieces may sometimes deform or crack after quenching. This is partly due to the workpiece’s shape and dimensions (complex geometry or excessive local dimensional variations). It may also be caused by microstructural inhomogeneities within the workpiece (such as the presence of large inclusions, carbides, or machining cracks); or due to operational factors…
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It’s not about the size of the client, but the quality.blog 170
In business, dealing with difficult customers can lead to a whole host of problems. Just a few days ago, we had a case where we accidentally shipped 8566 chipping-resistant steel (35x100x185) instead of the requested 8503 mold steel (35x100x200). The price difference was only 348 yuan, but once he realized we’d sent the more expensive 8566…
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The higher the hardness of die steel, the better its wear resistance—but this statement comes with a caveat.blog 167
When the hardness of die steel is below 58 HRC, wear resistance increases with increasing hardness; in other words, as we often say, the higher the hardness, the better the wear resistance. However, when the hardness of die steel exceeds 58 HRC, wear resistance is determined by the type and morphology of the carbides. The microstructure…
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I thought that once I found out the grade of the die steel, the problem of the die cracking would be solved, but after three months of struggling, it still wasn’t resolved.blog 166
Some people come to me for advice on die steel, thinking that once they know the grade, their problem is solved. But there was one person who, even after learning the die steel grade, spent three months struggling with the issue—yet the problem of the die cracking remained unsolved. He was stamping 0.15mm-thick 304 stainless…
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Cold-forging dies for aluminum optical modules made from 8407 die steel wear out and become scrap after producing just 10,000 units; high-toughness LG die steel must be used instead.blog 165
Between yesterday and today, I’ve received inquiries from two customers regarding the rapid wear of cold forging dies for optical modules. Cold forging dies for optical modules experience rapid dimensional wear and require high precision. Currently, we’re using 8407 die steel, but the dimensions wear out and exceed tolerances within two days at most, and…
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The end user has specified that the mold manufacturer should purchase Yuhui LG mold steel, but the mold manufacturer will not do so; specifying the purchase is pointless.blog 164
Even when specified, the mold manufacturers won’t buy it. Although end users specify that mold makers should use Yuhui’s high-toughness LG mold steel, the mold makers simply won’t purchase it. A customer just came in to complain that while Yuhui’s LG steel no longer cracks in cold heading dies for aluminum parts, its wear resistance isn’t…
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An aluminum forming plant has once again purchased 90 pieces of high-toughness LG die steel from Yuhui.blog 163
I saw these 90 pieces of machined, high-toughness LG die steel blanks in the workshop, ready for shipment. I’m in a good mood, so I wanted to share this with everyone. This customer manufactures cold-extruded, shaped, and bent aluminum products. Previously, they used Cr12MoV and SKD11, both of which were prone to sticking to aluminum shavings, resulting…
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Mr. Long asked me what type of die steel to use for cold-forming red copper so that it doesn’t crack. I’ve tried three different types of die steel, and they all cracked.blog 162
Don’t assume that just because a customer calls you five times, they’re going to place an order. They’re not calling to buy your die steel; they’re just calling to confirm whether their understanding is correct. On May 26, Mr. Long called me and asked what kind of die steel he should use for cold extrusion of red copper to…
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Which die steel is best for stamping phosphor bronze? 8566 die steel can withstand 1 million cycles when stamping 0.3mm phosphor bronze.blog 161
Mr. Lu asked, “What die steel works best for stamping phosphor bronze?” Molds for stamping phosphor bronze are prone to copper powder adhesion. I asked him to clarify: “What thickness of phosphor bronze are you stamping? What die steel are you currently using? Are you experiencing corner chipping, or is it a copper powder adhesion issue?” He is stamping…