Since the country implemented a market economy, the specialized production of heat treatment has developed rapidly since 1995, which is mainly reflected in the rapid growth of private and joint-stock companies specializing in heat treatment processing. In 2003, the total number of such enterprises mainly concentrated in coastal cities was at least 2,000. In recent years, private heat treatment companies in North China, Northeast China and the Mainland have also seen a significant growth trend. There may be 3,000 specialized heat treatment plants nationwide. The average annual turnover of each enterprise is conservatively set at 2 million yuan. The annual turnover of such enterprises in the country can reach 6 billion yuan, accounting for about 20% of the total turnover of heat treatment in the country. This ratio is greater than 10% in the United States and less than 30% in Japan. It is undeniable that this is the greatest achievement made in recent years since the country promoted specialized production in the 1980s, and it is also an inevitable product of deepening reform and promoting a socialist market economy.
Heat treatment production technology transformation and equipment renewal are in full swing
Most private enterprises recognize the importance of a high-tech starting point in maintaining their strong competitiveness. They have sufficient funds and capabilities to purchase advanced heat treatment equipment. Aviation, weapons, and shipbuilding industries have benefited from the country’s national defense modernization policy in recent years and have carried out large-scale technological transformations and equipment updates. The unprecedented development of the automobile industry has created a large demand for advanced heat treatment technology and high-precision heat treatment equipment. Aviation industry companies and coastal private enterprises that mainly target light industrial product molds have added a large number of vacuum heat treatment equipment in recent years, especially high pressure gas quenching equipment. . Automobile and weapon industry enterprises and private enterprises mainly focusing on automobile and motorcycle parts use the multi-purpose furnace production line as the main technical transformation content. The heat treatment department of individual automobile companies has also introduced low-pressure carburizing and high-pressure gas quenching heat treatment production lines. Shipbuilding enterprises take the large-scale pit carburizing furnace with precise control of the carbon potential of the blast furnace temperature uniformity as the technical transformation target. In these enterprises, due to the vigorous development of production technology transformation, the proportion of non-oxidizing heat treatment has reached more than 90%. Basically realize the advanced heat treatment production with less oxidation, less distortion, less pollution, less waste, less labor, less quality dispersion.