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Heat treatment technology is another development direction for the improvement of pump valve castings. It combines traditional heat treatment technology with advanced surface treatment technology to increase the service life of castings. Such as the carbonitriding method of chemical heat treatment, combined with the conventional quenching and tempering process NQN (ie carbonitriding - quenching - carbonitriding) composite strengthening, not only get a higher surface hardness, and effective hardening The depth of the layer increases, the hardness gradient of the penetrating layer is reasonably distributed, and the tempering stability and corrosion resistance are improved. Through the continuous improvement of casting heat treatment technology, China's pump valve casting industry will usher in new technological development opportunities, but also promote the industry to better development.
Heat Treatment Technology Promotes Better Development of Casting Industry
It is understood that the traditional heat treatment process is quenching - tempering, and later developed a surface treatment technology. Because it can be used as a variety of characteristics of pump valve casting materials, the same surface treatment technology and process applied to different materials will produce different results. Recently, relevant experts proposed that the substrate pretreatment technology for casting substrate and surface treatment technology, based on the traditional process, put forward suitable processing technology for different casting materials, thereby improving the performance of the casting and increasing the life of the casting.