Thermal spraying technology has been developing for more than 50 years. Because it has an important role in the industry, which appeared a large number of large and small companies. However, due to the recent development of the global economy, the relationship between the companies gradually shifted from competition to the joint. Developed today, the world's leading thermal spraying technology companies are:  · SULZERMETCO company. The company is the original Swiss PT company and the United States METCO company merged, headquartered in Switzerland, now has assets of 40 to 50 billion US dollars, business in more than 140 countries and regions, is the world's largest thermal spraying technology company. PRAXAIR Surface Technology Engineering Company. The company previously owned a joint carbide company, headquartered in the United States, mainly produces a variety of powders. Now it purchased the MILLER Thermal Spraying Company, which formed a more complete thermal spray technology company.  · EUTECTIC company. It is a subsidiary of EUTECTICCASTOLIN Corporation, headquartered in the United States, has now merged with TAFA, which previously belonged to the United States, Texas Hobart Metallurgical Technology Company (MTI).