The boss consulted, cold extruded aluminum mold, now DC53 is used, and if you can't squeeze much product, then aluminum will be stuck, and the parts will be damaged. Is there any quality problem with the DC53 I bought?
Yuhui Mold Steel Huang Zipeng wants to say that the aluminum material itself is relatively soft, and the bonding wear occurs when the cold extrusion mold works, which has little to do with the hardness of the mold steel. It is mainly related to the finish of the mold surface. There should be no fine cracks on the surface, there is no carbide segregation, and it cannot fall off. Otherwise, aluminum powder will penetrate into the aluminum extrusion process to form attachments, which will scratch the product when extruding the next workpiece.
DC53 is a high alloy steel containing 1% carbon and 8% chromium. Because it reduces the content of carbon and chromium, it can temper at high temperature, has small grains, and reduces carbide segregation phenomenon, so it has better anti-adhesion properties than SKD11 and Cr12MoV. Now, we will stick aluminum by extruding a few products. Huang Zipeng, Yuhui Mould Steel, believes that the DC53 I bought now may be of poor quality.
According to past experience, if aluminum extrusion molds do not stick, you should choose materials that can ensure that there is no carbide segregation and can be polished mirror. Huang Zipeng, Yuhui Mold Steel, suggested that materials such as LG and 8566 can be remelted from electroslag in cold work tool steel. You can choose V4, V8, and V10 with high vanadium content in powdered steel.
Zhejiang has a boss who is cold extruded 6061 aluminum automotive parts. Use LD mold steel to squeeze 3,000 pieces of products, small cracks appeared on the mold wall, and about 10,000 pieces of products were squeezed, and the mold was completely cracked and scrapped. The hardness of the LD mold steel has also been adjusted, and the life of the mold has not been significantly improved. With other materials, the lifespan will be shorter.
The same mold was replaced with LG mold steel, and the mold was tested for 3,000 pieces of product, and there was no crack on the surface of the mold. It has been used for 3 years now, and the mold life is stable at more than 30,000 molds. The material performance and mold performance are very stable. No batch suddenly cracks occurred. Moreover, the extruded products have better surface quality and brighter, and the customers are also very satisfied. Huang Zipeng, Yuhui Mold Steel, was also very happy.
LG mold steel has a toughness of 8-9 times that of DC53. The mold has good toughness and will not crack even if it is knocked. Using hardness in HRC54-58, this strength and wear resistance, it is completely sufficient to make aluminum cold extrusion molds. Moreover, it can be polished on the mirror surface, with a mirror surface of more than 10,000, so there is naturally no trouble with sticking materials. There are already many owners of aluminum extrusion, iron extrusion, aluminum stamping and other molds used.
LG mold steel has 165*200 large-size sheet hard material, small-size trial hard material, and round steel soft material. If the boss in front of the screen has similar working conditions, he should also try it with Yuhui Mould Steel Huang Zipeng.
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