SK3 materials, Yong Wei steel mold (certified), guest SK3 provided by the Dongguan City An Yongwei steel mold shop. Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) is specialized in the "mold steel, DC53, SKD11.SUS440C, SUS420" business, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Simon / R. Use square shoulder milling cutter cavity coarse milling, 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 blades), it will produce unpredictable cutting effect. In heat production practice SK3 hardness, for some large or special shape of the workpiece using a salt bath furnace heating when the protective methods are not convenient. 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 SK3 steel, Handan hot-rolled coil prices continue to refresh the current national minimum price of 2920 yuan, the current steel lock plate market price is still stuck in 2830 yuan, but the latest orders is less than ideal SK3, the spot market to the mainstream, the lowest price is the exploration of the 2830-2850 yuan, cold rolled coil market prices today adjustment area is also gradually increasing. Technological backwardness easily found, poorly managed easily overlooked. Domestic enterprises have adopted over the last part of the mold workshop-style management model, truly modern enterprise management, not more. Currently mold manufacturer uneven SK3 material conditions seriously affected the accuracy and quality of the mold. Zhuhai such as precision mold steel heat treatment areas, different mold materials, mold making homemade quality in appearance and service life difficult match with foreign products. Zhuhai steel mold-made molds are many and abroad using special mold materials used, their mechanical properties, wear resistance, corrosion resistance and superior brightness polishing. Chinese standard GB / T1299-2000 "alloy tool steel" provides annealed condition of the steel, for different grades of hardness value should be less than a certain value, or within a range of hardness, such as: hardness hardness 197-241HBW 217-269HBWCr5Mo1V hardness ≤255HBW. Depending on the sample quenched hardness grades, generally between 53-64HRC. Construction steel market prices in order to stabilize the main southern construction steel prices steady rise; plate market prices basically stable; hot rolled coil prices to stabilize the main; cold-rolled coil prices steady fall; Tudu coil market prices basically stable. National Development and Reform Commission deputy director of the National Energy Bureau Wu-hsiung said the 9th, to promote the development of coal-fired energy saving and emission reduction upgrading and transformation, Energy Bureau scientific power development plan, reasonably determine the annual thermal power construction scale and guide local optimization of thermal power project layout on the low utilization hours of thermal power (4500 hours or less) areas, to strictly control its thermal power construction scale year.