The role of heat treatment process in processing mold steel

The heat treatment process plays a decisive role in the quality of the mold, but the failure rate of 50% is an extremely embarrassing data for all heat treatment professionals. How to effectively improve this relatively large number is a very realistic problem that the industry needs to face, involving the vital interests of mold manufacturers, steel suppliers, processing companies, etc. If companies continue to take the lead under the market system in the future, Separately, then this data will continue to expand, and the industry's unhealthy conditions will continue to deteriorate.

The direct influence of the heat treatment process on the performance of the mold is mainly changed: the manufacturing accuracy of the mold: the uneven transformation of the structure and the excessive residual stress formed by the heat treatment cause the deformation of the mold during the processing, assembly and use of the mold after the heat treatment , Thereby reducing the accuracy of the mold, or even scrapping. The specific manifestations are as follows: First, it affects the strength of the mold: Second, the unreasonable structure and excessive grain size caused by heat treatment lead to the decline of main properties such as mold toughness, cold and hot fatigue performance, and wear resistance. The working life of the mold: Third, restrict the manufacturing cost of the mold: As an intermediate or final process of the mold manufacturing process, the cracking, deformation and performance caused by heat treatment will cause the mold to be scrapped in most cases, even if it is repaired It can still be used, it will also increase the working hours, extend the delivery period, and increase the manufacturing cost of the mold. As far as mold steel is concerned, heat treatment can effectively change the surface structure and internal organization of the mold steel, which is suitable for the production needs of various molds.

The quality of die steel is different, the method of heat treatment is different, and the effect is also different. If the heat treatment process fails to meet the specified requirements, it will reduce the performance of the die steel in terms of toughness, rigidity, and wear resistance, and cause the internal quality of the steel to change. In contrast, high-level heat treatment technology can enhance the performance advantages of mold steel, make it more suitable for the material needs of various mold products, and ensure a high-precision, long-life mold, which requires high-quality steel and high-level heat treatment. The combination of craftsmanship.

If the heat treatment industry wants to change the current status quo, it needs to start from many aspects. The first is to increase the structural adjustment of the heat treatment industry. Specialized heat treatment plants should step up product structure adjustments, strengthen technological transformation, actively develop new products, improve product technology grades, and create high-level brand-name products with independent intellectual property rights in accordance with market needs, foreign advanced technical standards and the company’s own technical advantages. Improve market competitiveness and gradually form a high-level specialized factory with distinctive technical characteristics. Relevant government departments should adopt more relaxed policies to support the transformation of state-owned and collective heat treatment enterprises, support private heat treatment enterprises with obvious technological advantages, support enterprise technological transformation, guide enterprises to purchase advanced heat treatment technology and equipment, and provide subsidies and loans. Form China's heat treatment specialized production scale and system as soon as possible.

Secondly, strengthen the internal management of the industry and enterprises, and standardize the market order. China Heat Association should work with local heat associations to gradually establish and improve regulations, standardize market order, insist on equal competition, and safeguard the legitimate rights and interests of enterprises; assist enterprises in quality management, certification consulting and personnel training, so that more companies in the heat treatment industry Reach the international standard certification, improve the competitiveness of enterprises; guide a group of enterprises to take the road of scientific development, and gradually form the core backbone of China's heat treatment industry.

Finally, we must increase investment in science and technology to support technological innovation. It is recommended that the country, society, and enterprises should invest in three parties, with the active participation of heat treatment industry organizations, universities, and scientific research units, as soon as possible to support the establishment of relevant science and technology service centers, such as heat treatment engineering technology center, heat treatment quality inspection center, heat treatment education and training center, and heat treatment Information Service and Information Center.

Continue to conduct research on the industry situation, keep abreast of the rapid changes in industry development, establish and improve industry files, gradually improve and enrich industry information systems and websites, and gradually release the economic and technological development trends and trends of the machinery industry and heat treatment industry to the industry on a regular basis. Information, make market analysis and forecasts, and reflect corporate opinions, suggestions and requirements to relevant government departments in a timely manner.

Die steel companies also need to continuously improve their quality, expand the application of die steel, and save the advantages and eliminate the disadvantages. At the same time, we will selectively develop advanced die steels and improve China’s die steel series. In recent years, the consumption of domestic mold steel has been increasing year by year, and the import volume of foreign mold steel accounts for 1/3 of the demand of mold steel, and it is gradually increasing. The main reason is that there are fewer varieties and specifications of domestic die steel, the low degree of commercialization of die steel distribution, and the promotion of domestic new steel and the application range are not large enough. Chinese steel production enterprises have not yet adapted to this commodity market mechanism.

The failure of molds and the shortened lifespan of molds. According to investigations, more than 50% of the reasons are due to poor heat treatment process. It can be seen that heat treatment process is ensuring mold manufacturing accuracy, reducing manufacturing costs, improving product strength, and extending service life. Performance plays a great role. The quality of mold steel has greatly affected and restricted the precise application of heat treatment technology, making heat treatment processing unable to exert its maximum effect, and finally leading to uneven quality of molds.