The requirement of the carburizing layer, the thickness of the general carburizing layer is 0.8~1.5mm. When the plastic is pressed with hard filler, the thickness of the mold is 1.3~1.5mm. When the soft plastic is pressed, the carburizing layer thickness is 0.8~1.2mm. The carbon content of the carburizing layer is 0.7%~1.0%. If the use of carbonitriding, the wear resistance, corrosion resistance, anti-oxidation, anti - viscosity is better.
Carburizing temperature is generally at 900~920°C, and the small mold of complex cavity can be carbonitriding at 840~860°C. The time of carburizing and heat preservation is 5~10h, which should be chosen according to the requirement of the thickness of the coating layer.
Carburizing process with stepped carburizing process is the best, asdyize06 namely high temperature stage (900~920 °C) to quickly carbon infiltration plastic mold components surface; in temperature stage (820~840 °C) to increase the thickness of carburized layer, so in the carburized layer to establish a uniform and reasonable carbon concentration gradient distribution and to direct quenching.
After carburizing quenching process according to different steel grades, after carburizing can be respectively by: reheated quenching; grading after carburizing direct quenching (such as alloy carburizing steel); the temperature of the medium temperature carbon and nitrogen after the direct quenching (for example, the small precision mold use industrial pure iron or low carbon steel cold extrusion forming); air cooling after carburizing and quenching (such as high carbon alloy steel and manufacture of large and medium-sized mold).
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The above article from YIZE official website(http://www.yizemoulds.com/)
The original address:http://www.yizemoulds.com/news_show_6_29_419.html,reproduced please specify.
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