Yong Wei mold steel, YK30 sheet, Fangchenggang YK30 provided by Yong Wei steel mold. We are Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) located: Dongguan, Guangdong specializes in: mold steel, DC53, SKD11.SUS440C, carbon content and alloying elements of steel SUS420 steel for quenching crack tendency important affected. Generally YK30, with increasing carbon content of martensite, brittle martensite increases, reducing the brittle fracture strength of steel, increasing the tendency of quenching cracks. When increasing the carbon content YK30 material, thermal stress on the weakened tissue stress enhancement. When quenching in water, the surface compressive stress of the workpiece becomes small, and the maximum value of the tensile stress near the middle of the surface. When quenching in oil, the surface tensile stress becomes larger. All these have increased the quench cracking tendencies. Die steel by cryogenic treatment (-196 ℃), can improve its mechanical properties, some die after cryogenic treatment significantly increased service life. Cryogenic steel mold can be carried out between the quenching and tempering processes, but also for cryogenic treatment after quenching and tempering. If you still retain residual austenite in quenched and tempered steels, then after cryogenic treatment remains tempered once again. Cryogenic treatment can improve the wear resistance of steel and temper resistance. Cryogenic treatment not only for cold mold, can also be used for hot work die and carbide. Use square shoulder milling cutter cavity rough milling YK30 supplier in the semi-finishing would remove the bulk of the stepped cutting margin. This will allow the cutting force changes, so that the bending tool. The result is to leave uneven finishing allowance, thus affecting the geometric precision of the mold. If you use the tip strength weaker square shoulder milling cutter (with triangular blade) YK30 plate, cutting will produce unpredictable effects. In heat production practice, the work of some of the special shape of the use of large or when the protective salt bath furnace heating method is not easy. If you must use box-type furnace or reverberatory furnace heating, these large or special shape of the workpiece, according to the following methods to prevent oxidation and decarbonization work. The continued strength of the recent rise in construction steel kinetic energy has been significantly weakened, leading regional Beijing, Xi'an prices flat, rising exploration area is also just stay in the individual regions. Currently in Beijing, Tianjin steel prices remained at about 2750-2780 yuan, hot-rolled coil, cold rolled coil and plate market prices fell slightly accelerated momentum, Handan hot-rolled coil prices continue to refresh the current National Low 2920 Yuan, lock the current steel plate market price is still stuck in 2830 yuan, but the latest orders is less than ideal spot market mainstream, the lowest price is the probe to the 2830-2850 yuan, cold rolled coil market price adjustment region is today gradually increased.