Factors affecting the thermal fatigue resistance of steel are mainly: ① steel thermal conductivity. The high thermal conductivity of steel, a metal mold can reduce the degree of the surface is heated, thereby reducing the tendency of the steel to thermal fatigue. Generally believed that thermal conductivity and cooperation related to the amount of carbon steel, high carbon content when low thermal conductivity, so not hot work die steel with high carbon steel. Commonly used in the production of carbon steel (C0.3% 5 ~ 0.6%) combined carbon content is too low. Causes the decrease in the hardness and strength of steel. Is disadvantageous. Critical point ② Steel. The critical point is usually steel (Acl) is higher. The lower steel thermal fatigue bias. Steel mold steel very tough in the work process, the mold bear the brunt of the load, in order to reduce the use of the process of breaking, chipping and other forms of damage, mold steel requires a certain degree of toughness. Number of factors mold steel chemical composition, grain size, purity, carbides and inclusions, morphology, size and distribution, as well as the microstructure and other heat after heat treatment systems and obtained all die steel-on-steel a great deal of impact toughness. Good machining surface corrosion and corrosion resistance: easy pattern formed plastic parts, and some plastics, such as polyvinyl chloride in hydrochloric acid gases generated during molding DC11 rod, for cavity corrosive. So for corrosive gases used in plastic, to consider the corrosion-resistant steel is good. To a reasonable choice of the chemical composition of the steel and the use of reasonable refining, thermal processing and heat treatment process to make the mold material wear resistance, strength and toughness to achieve the best fit. Strong wear resistance steel mold, in addition to steel mold steel also has the ability to thermal fatigue. Hot work die steel under service conditions in addition to cyclical changes in load, but also subjected to high temperatures and periodic thermal shock effect. Compared with the hardening atmosphere under vacuum oil quench hardening mold surface is relatively uniform, but slightly higher, mainly due to the vacuum heating, mold steel surface was an active state, not removal, does not produce an oxide film impede cooling. DC11 was heated under vacuum to import the mold surface of the steel degassing effect, and thus has high mechanical properties DC11 wholesaler, the degree of vacuum in the furnace, the higher the bending strength. Vacuum quenching, the fracture toughness of the steel increased die life generally increased by 40% to 400% higher than the conventional process, or even higher. Cold mold vacuum hardening technology has been more widely used. Yong Wei mold steel _DC11 price _ Mountain DC11 provided by Yong Wei steel mold. Looking for "Die steel, DC53, SKD11.SUS440C, SUS420" reliable supplier, choose to have the entire network ShangMeng Certified: Dongguan City An Yongwei mold steel shop (www.dgyongwei.com), trustworthiness and reliability, now click on "Commercial Union Support" on page live chat with us now!