Yong Wei mold steel plate _ Yongchuan M42 _M42 provided by Yong Wei steel mold. We are Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) located: Dongguan, Guangdong specializes in: mold steel, DC53, SKD11.SUS440C, SUS420 metal mold cavity surface thermal fatigue (cracking). Hot mold work is characterized by intermittent. Each time the thermal state of the metal to be formed after the water cooling of the mold cavity surface of oil, air and other media. As such. Hot work die repeatedly heat and state cooled so molding skin produce repetitive expansion and contraction of metal cavity, which repeatedly subjected to tensile and compressive stress. As a result, surface cracks caused by the mold cavity, called thermal fatigue phenomenon, whereby hot die steel is proposed for the second basic performance requirements. That has a high thermal fatigue resistance. Diameter size shoddy steel fluctuations due; L, steel surface temperature instability yin and yang. 2, the composition of the steel uniform. 3, due to poor equipment, low ground strength, source: mold technology mill Colloction big bounce. There will be changes in the larger inner diameter of the same week, so easy to produce steel discontinuity fracture. Heat treatment of high-energy beam source usually refers to the laser, electron beam, ion beam, etc., their common features are: feed material surface power density of at least 103W / cm2, their common features are: fast heating, heating area can be selected, deformation of the workpiece is small, does not require a cooling medium, the processing environment clean, controllable, inexpensive to implement automated processing. Heat treatment of high-energy beam principle, process etc invested abroad more research, and improve die life in terms of access to applications. 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. Two heating changes when heated to room temperature and tissue transformation of austenite and martensite transformation upon heating tempering; three M42 steel cooling transformation of austenite to pearlite transformation of austenite to Belleville transition body austenite to martensite transformation. So according to these theories and data can be formulated heat treatment process or the operation system. Of course, some practical experience and operational capacity is a must. Recent domestic policies to stimulate the market demand for the introduction of intensive M42, the Ministry of Finance to cancel coal import tariff on the market sentiment to form a strong boost. APEC summit to be held in Beijing, environmental management efforts to increase steel production is expected to bring, but also the formation of the steel market confidence boost. Recently black chain futures eye-catching performance, iron ore futures trading, futures also just under 1 yuan thread limit M42 wholesalers, cash businesses will significantly push up the market mainstream offer short term cumulative increase of nearly hundred dollars. However, the price level after a turnover and no timely follow-up, lower procurement initiative slowdown, the business mentality tends to be cautious, resources to pull up too fast quote section loose. Given the current stocks are low, specifications shortage and other factors on the current market price is still strong support, short-term price or low balance finishing.