Hot red hardness at high temperature working die, required to maintain its organization and stability, thereby maintaining a sufficiently high hardness, this performance is called red hardness. Carbon tool steel, low alloy tool steel is usually able to maintain this performance in the temperature range 180 ~ 250 ℃, the chromium-molybdenum hot work die steel is generally in the temperature range of 550 ~ 600 ℃ to maintain this performance. Red hardness of steel depends on the chemical composition and heat treatment of steel. Mold heat treatment is important to ensure mold process performance. It follows the performance of the mold has a direct impact. Manufacture of precision molds: organizational change is uneven, not completely formed and heat treatment of residual stress caused by excessive mold deformation after heat treatment processing, assembly and mold used in the process, thereby reducing the accuracy of the mold, or even scrapped. The strength of the mold: the development of improper heat treatment process, heat treatment operations are not standardized or heat treatment equipment supplier status is not intact W302, causing mold to be processed strength (hardness) less than the design requirements. Mold working life: the organizational structure of heat caused by unreasonable, excessive grain size, leading to major properties such as mold toughness, thermal fatigue performance, wear resistance and other material decline W302 affect the working life of the mold. The manufacturing cost of the mold: a mold part of the manufacturing process as an intermediate or final step, the cracking caused by the heat treatment, the deformation tolerance and tolerance performance in most cases will die scrap W302, W302, even through the plate can continue to use the patch, and increased working hours, extended delivery, increase manufacturing cost of the mold. It is the quality of heat treatment technology and mold have a very close relationship, making it two kinds of technology in the process of modernization, promote each other and improve together. Since the 1980s, the international mold heat treatment technology developed rapidly in the field of vacuum heat treatment technology, the mold surface strengthening technology and pre-hardened mold material technology. Yong Wei steel mold (Dongguan) Co., W302 material, W302 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!