Ming Yuan Metal Products Co., Ltd. supply high-quality XW-42 mold steel imported mold steel xw-42 xw-42 mold steel specifications 

 Mold steel XW-42 Description: 

 XW-42 is a molybdenum, vanadium, high carbon, high chrome alloy tool steel, is often recommended as a good wear resistance and adequate toughness (impact resistance) of the mold; XW-42 is very suitable for large-scale mold in the inserts. In addition to the XW-5 range of applications, usually can also be used in the forming mold for cutting thick and load. Chemical composition of the main chemical composition (%) C Si Mn Cr of Mo, V 1.2379 1.55 0.30 0.40 11.80 0.80 0.80 features [2]? (1) high wear resistance, high compressive strength; 2; ③ The hardened high surface hardness; ④ excellent the overall hardenability; ⑤ The hardened, with excellent stability; ⑥ The excellent resistance to tempering. Heat treatment ① soft annealing: in the protective atmosphere, heated to 850 ° C, after soaking an hour 

 10 ℃ furnace cooling to 650 ° C, then air-cooled. ② eliminate stress: the mold should be heated to 650 ° C. After rough, are thermal insulation of two hours, slowly cooled to 500 ° C, then air-cooled. (3) hardening (hardening) process: preheating temperature :650-750 ° C; :990-1050 ° C austenitizing temperature, usually select 1000-1040 ℃. ④ quenching medium: oil cooling (applies only to a very simple mold); in a vacuum furnace, high-speed gas cooling flow of air / gas; in the salt furnace or fluidized furnace, 180-500 ° C, quenching followed by air cooling . Note: mold cooling to 50-70 ° C, immediately after tempering (XW-42 all the standard sizes of mold can be hardenability) ⑤ temper: temper twice and each time after tempering cooling to room temperature, the minimum tempering The temperature is 180 ° C, each tempering insulation at least two hours. ⑥ hardening dimensional changes (sample size: 100 × 100 × 25 mm) deep cold treatment, the dimensional stability requirements of the workpiece to cryogenic treatment should be adopted, this type of processing applied to gauge gauges and certain structural components. Immediately after quenching, the workpiece is cooled to between -70 ° C to -80 ° C [1], to maintain 3-4 hours, and then tempering, cryogenic treatment enables the hardness to improve the 1-3HRC, to avoid the complex shape of the mold so as not to increase the risk of rupture . The aging temperature is 110-140 ° C, holding time of 25-100 hours. Nitriding process the hardened layer formed on the surface of the workpiece after nitriding treatment, the high wear resistance and corrosion resistance, corrosion resistance is also improved. 525 ℃ in nitrogen, the nitriding process, the workpiece surface hardness of approximately 1150HV1 570 ℃ Nitrocarburising the two hours after, workpiece surface hardness of about 800 HV1 hardness of the hardened layer of 10-20 microns. 

 Ming Yuan Metal Products Co., Ltd. supply high-quality XW-42 mold steel imported mold steel xw-42 xw-42 mold steel specifications