ASP30 hardness, Yong Wei mold steel, Taojiang provided by the Dongguan City An Yongwei ASP30 steel mold shop. Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) is a professional "mold steel, DC53, SKD11.SUS440C, SUS420" of the company. Since its inception, we adhere to the "honesty, sound management" approach, the courage to healthy competition in the market, so that "Sweden Assab, Daido, Hitachi, Austria Bluff" brand has a good reputation. We adhere to the "service first, customers first" principle, the permanent mold steel Granville won the trust of customers congregation in special steel, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! Regardless of plastic mold, which allows the surface roughness of the cavity is extremely small, are required to be able to do almost a mirror shine. To achieve specular gloss, the main point is that the steel must have not less than 38HRC hardness ASP30 price, preferably 40 ~ 46HRC, 55HRC achieve the best. To achieve specular gloss, the first steel inclusions as little as possible, but can not have a bubble exists, and fibrous tissue uniform. In the mass production of the mold, in order to reduce wear, in addition to the cavity surface hardness, surface roughness is also an important condition. Hypoeutectoid steel for adoption. In order to refine the grain, homogeneous, eliminate stress, reduce the hardness of full annealing process. Castings, forgings, weldments and rolling commonly used. The steel is heated to 30-50 degrees Celsius above Ac3, usually carbon steel to 1.5-1.8min / mm; steel to 1.8-2.0min / mm insulation. Then the furnace was cooled to 500-600 degrees Celsius baked. After cooled baked. Near the end, businesses accelerate the phenomenon of increased shipments, the recent local cold-rolled prices dropping again, cold resources are more abundant. Slowdown in downstream demand growth, lower purchasing volume does not appear, the current high supply, the greater the market pressure on prices is difficult to rebound. And cold rolled prices are still some gaps. Temper brittleness can be divided into first class and second class temper brittleness temper brittleness. The first category, also known as irreversible temper brittleness temper brittleness, mainly in the tempering temperature is 250 ~ 400 ℃ when ASP30, brittle disappear after reheating repeated in this interval temper brittleness not happen again, back to the second category Fire brittle, also known as reversible temper brittleness temperature occurring in the 400 ~ 650 ℃, when reheated brittleness disappears, should be quickly cooled, can not stay long or slow cooling in the range of 400 ~ 650 ℃, otherwise it will happen again catalytic phenomenon. The occurrence of temper brittleness of steel alloying elements contained in the relevant, such as manganese, chromium, silicon, nickel produces tendency to temper brittleness, and molybdenum, tungsten has a tendency to temper brittleness and weakening. Die steel, such as 3Cr2W8V, H13,5CrNiMo, 5CrMnMo etc., using higher than conventional heating quenching quenching temperature, can reduce the number of carbides in the steel to improve its morphology and distribution, so that the solid solution of carbon in austenite distribution of ASP30 material after quenching can get more lath martensite in the steel to improve its fracture toughness and thermal fatigue resistance, thus prolonging the life of mold. For example, one hot 3Cr2W8V steel extrusion dies, conventional quenching temperature is 1080 ~ 1120 ℃, tempering temperature is 560 ~ 580 ℃. As we all know, this year the real estate market is very weak ASP30 material, continuous downward price turnover sluggish performance of the economy as a whole form a larger pressure, to a certain extent, restrict the continued development of the economy. Then, after the country have relaxed the restriction, the central bank introduced the New Deal in the end of September: the lower the lending rate is 0.7 times the benchmark lending rate, to have two sets and more housing and home loans have been settled respective families, and apply for loans to buy housing banking financial institutions should carefully grasp according to the borrower solvency, credit conditions and other factors and to specify the down payment ratio and lending rates