Isothermal annealing is mainly used to refine the organization of carbon steel, alloy steel forgings, stampings, etc., reduce the hardness to prevent white spots and even organizations. Annealing is heated to 30-50 degrees Celsius above Ac3, isothermal above Ac1 20-30 degrees Celsius, insulation can be adopted in accordance with the fully annealed. Cooling rapidly cooled to below Ac1 isotherm. Isothermal time more important: Carbon 12 hours, alloy 3-4 hours. Isothermal time ends KHA77 suppliers, remove air cooling. In fact, foreign anti-dumping on the domestic mills is not much more than the size of the impact at this stage the uproar, after all, this type of steel production product regular, reliable quality, reasonable price in the eyes of foreigners peers gold is still very foot KHA77, informal channels Under the circumstances the conduct is also, not only does the anti-dumping storm blowing its body, but also the opportunity to get rid of the market in shoddy, disrupt the black sheep of the international market trading order. So basically these mills sit back, quite see Pretrial blossom, since the extra cash I chic style. Shantou increasingly large steel mold, especially in increasingly large molding parts, in order to improve production efficiency KHA77 rod, a multi-cavity mold, so a large block of steel demand will increase year by year; precision molds increasingly high requirements for the quality of steel Good, high dimensional accuracy, good stability; the demand for plastic mold steels, die casting mold steel is increasing; the demand for high-grade steel mold growing increasingly surplus low-grade tool steel. Processing and heat treatment of high alloy tool steel, low alloy tool steel than is usually more difficult, so the mold manufacturing costs are higher, while the ASP-23 high speed steel powder its machinability, manufacture than traditional methods of high-alloy tool steel Fortunately, dimensional stability, heat treatment is relatively good, and easy to predict. More because of ASP-23 high hardness, good toughness and high temperature tempering characteristics, especially for surface treatment, very easy to process. In the heat treatment of steel materials, the practice on the basis of years people have come up a set of simple forms of memory: called a graph, two curves, four fire, five changes. A graph is called iron-carbon alloy equilibrium phase diagram or called iron-carbon alloy state diagrams, organizational change can be summed up many of the common law and the critical parameters of the equilibrium state of the steel material. As more high-grade, high-quality iron ore supply on the market, Chinese steel mills in the low-grade ore negotiations already have more bargaining power. In 57% to 58% grade sinter FMG supply, for example, Chinese steel mills to get the discount for the actual Platts index is the highest compared with 14% discount. January super-special meal discounts had reached $ 4 per dry ton, and now even reached $ 12 per dry ton. Platts recently released data show that the new export orders index in October amounted to 70.96 points in Japan KHA77 mold steel, an increase of 12.91 points over September, which means that China's steel export volume growth trend will continue in October. In contrast, China's steel sentiment index in October was only 38.09 points, becoming the lowest level in January this year. The data also show that steel production index in October compared with September fell 6.37 points to 35 points, the fourth consecutive month the index has been below 50 points, reflecting market participants expect steel production will decline. Yong Wei mold steel | KHA77 rod | Yunfu KHA77 provided by the Dongguan City An Yongwei steel mold shop. "Die steel, DC53, SKD11.SUS440C, SUS420" preferred Dongguan City An Yongwei steel mold shop (2), the company is located at: 3 A, Dongguan City Changan Ha Kong, the first industrial zone, over the years, Yong Wei mold steel stick providing customers with the best quality service, contact: Simon / R. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Yong Wei mold steel expect to be your long term partner!