Said ordinary abrasive abrasive characteristics of the project are: the shape, size abrasive, grain size, hardness, organizations and bonded abrasives abrasive hardness refers to the external force, the degree of difficulty falling from the abrasive surface S7 wholesalers , which reflects the strength of the binding agent holding the abrasive grains depends on the hardness of the binding agent and the addition amount of the number density of the abrasive, the abrasive grains easily fall off said low-hardness abrasive; Conversely, high hardness, said hardness. Ratings are generally divided into super-soft, soft, soft, medium, medium-hard, hard and superhard seven level, from these levels can be subdivided in a number of small magnitude. method for the determination of hardness S7 abrasive sheet, more commonly There are hand-cone method, mechanical cone method, Rockwell hardness measurement method and blasting hardness assay. Vacuum heat treatment technology is developed in recent years a new type of heat treatment technology, it has the characteristics of mold manufacturing is urgently needed, such as to prevent oxidation and decarburization heating, vacuum degassing or outgassing, eliminating embrittlement S7 rod, thereby enhancing the material (parts) ductility, toughness and fatigue strength. Vacuum heating is slow, small temperature difference between inside and outside parts and other factors, determines the vacuum heat treatment process caused by deformation and small parts. Factor in the number of die steel chemical composition, grain size, purity, carbides and inclusions, morphology, size and distribution, as well as the microstructure after heat treatment systems such as tool steel and heat treatment of steel were obtained a great deal of impact toughness. In particular purity and thermal processing of steel deformation transverse impact toughness is more obvious. Toughness, strength and wear resistance are often conflicting. Therefore, a reasonable choice of the chemical composition of the steel and the use of reasonable refining, thermal processing and heat treatment processes to make the mold material wear resistance, strength and toughness to achieve the best fit. Yong Wei steel mold (Dongguan) Co., Ltd. _S7 rod _S7 provided by Yong Wei steel mold (Dongguan) Limited. Search for "mold steel, DC53, SKD11.SUS440C, SUS420" fly suppliers, network operators choose to have a full alliance Certified: Dongguan City An Yongwei steel mold shop (www.dgyongwei.com), trustworthiness and reliability, now click on "Commercial Union customer service" on page live chat with us now!