What are the surface treatment technologies for molds?

 Mold is one of the important foundations of modern processing industry. With the continuous development of mold forming and processing technology, the requirements for mold materials are becoming higher and higher. Today, the editor of Hao Shun Guangzhou Mold Factory will tell you about the surface treatment technology of the mold:

  In addition to the reasonable cooperation of the matrix with sufficient strength and toughness, the surface properties of the mold are very important to the working performance and service life of the mold. These surface properties refer to: wear resistance, corrosion resistance, friction coefficient, fatigue performance, etc. These performance improvements relying solely on the improvement and improvement of the base material are very limited and uneconomical. Through surface treatment technology, they can often get more results with less effort, which is why the surface treatment technology has developed rapidly.

  The surface treatment technology of the mold is a system engineering that changes the morphology, chemical composition, structure and stress state of the mold surface through surface coating, surface modification or composite treatment technology to obtain the required surface properties. From the surface treatment methods, they can be divided into: chemical methods, physical methods, physical-chemical methods, and mechanical methods. Although new treatment technologies are constantly emerging to improve the surface properties of molds, many of the main nitriding, carburizing, and hardening film depositions are used in mold manufacturing.

  Nitriding processes include gas nitriding, ion nitriding, liquid nitriding, etc. In each nitriding method, there are several nitriding technologies, which can meet the requirements of different steel types and different workpieces. Nitriding technology can form a surface with excellent performance, and the nitriding process is well coordinated with the quenching process of the mold steel. At the same time, the nitriding temperature does not require intense cooling after nitriding, and the mold deformation is minimal, so the mold surface is strengthened Nitriding technology was adopted earlier and is also the most widely used.

  The purpose of carburizing of the mold is mainly to improve the overall strength and toughness of the mold, that is, the working surface of the mold has high strength and wear resistance. The technical idea introduced thereby is to replace the higher-grade materials with lower-grade materials, that is, through carburizing and quenching, thereby reducing manufacturing costs.

  At present, the hardened film deposition technology is more mature than CVD and PVD. In order to increase the bonding strength of the surface of the film layer workpiece, a variety of enhanced CVD, 'PVI) technologies have now been developed. The hardened film deposition technology was first applied to tools (knives, cutting tools, measuring tools, etc.) with excellent results. A variety of tools have adopted hardened film coating as a standard process. Since the 1980s, the mold has adopted the coating hardened film technology. Under the current technical conditions, the cost of hardened film deposition technology (mainly equipment) is relatively high, and it is still only applied to some precision, long-life molds. If a heat treatment center is established, the cost of hardened film coating will be greatly reduced. , If more molds adopt this technology, they can improve overall