Technical Topics-第13页-Changsha Langfeng Metallic Material Co., Ltd.

Heat treatment of high strength fasteners according to technical requirements have to be quenched and tempered
Heat treatment of high strength fasteners according to technical requirements have to be quenched and tempered Heat treatment of high strength fasteners according to technical requirements have to be quenched and tempered. Heat treatment quenching is to improve the overall mechanical properties of fasteners to meet the product requirements of the tensile strength value and yield ratio. Heat treatment processes have a crucial effect on high-strength fasteners, especially their inherent quality, so advanced heat-treatment technology equipment is required to produce high-quality, high-strength fasteners. Due to high strength bolt production, low cost, the thread part is a relatively fine structure, therefore, require heat treatment equipment must have the ability to produce large, high degree of automation, heat treatment of good quality. Since the 1990s, the production line of continuous heat treatment with protective atmosphere has occupied the dominant position. The vibration floor type and net belt furnace are especially suitable for the heat treatment of medium and small size fasteners. Conditioning line in addition to the furnace sealing performance is good, but also has advanced atmosphere, temperature and process parameters of computer control, equipment failure alarm and display capabilities. High-strength fasteners from the material – cleaning – heating – quenching –...
Work Hardening and Mechanism of High Manganese Steel（二）
Work Hardening and Mechanism of High Manganese Steel（二） By adding steel bonded carbide, re-alloying of high manganese steel, according to the precipitation-enhanced dislocation theory, the elimination of coarse columnar crystals, so that the casting process is not broken and not broken, to improve its service life. Strengthen the matrix, and make it in the austenite dispersion precipitation of spherical carbides, clean grain boundaries, improve the shape of inclusions good distribution, to achieve comprehensive strengthening, making wear-resistant cast parts with high toughness, high strength and good wear resistance. For more information please link: www.langfengmaterials.com,please contact us: sales@langfengmaterials.com
Research Status of Amorphous Coatings
Research Status of Amorphous Coatings Amorphous is a long-range disorder, short-range orderly material. The physical and chemical properties of amorphous materials are more excellent than the corresponding crystalline materials. They are high strength, high toughness, high hardness, high corrosion resistance and soft magnetic properties. It is a kind of new metal material with great development prospect [twenty four]. Thermal spraying amorphous alloy coating is a new field of extensive research in materials science in recent years. Thermal spraying technology has been widely regarded as one of the preparation methods of large area amorphous coating. Commonly used methods are plasma spraying, HVOF and Explosive spray. (Including Si, B, Cr, Ni, etc.) were prepared by plasma spraying process. The microstructure of the coating was uniform, the coating density was high, the porosity was low, Oxide content is less, and has a high hardness, micro hardness in the range of 530 ~ 790HV0.1, the coating and the substrate with a good combination. Jin et al. [26] studied the microstructure and abrasion resistance of the explosive sprayed Fe-Cr-B alloy coating. The results show that the coating has good anti – wear and anti – corrosion properties, the coating in the sliding process of dynamic...
Introduction of Tantalum Carbide Powder
TaC = 192.96, carbon 6.224%, yellowish brown powder, hard and heavy, high chemical stability and good high temperature performance. Density of 14.5% g / cm3, melting point: 3875 degrees, boiling point: 5500 degrees, Tantalum carbide powder is an important metal-ceramic materials, with it made of knives, can be resistant to 3800 degrees below the high temperature, and its hardness can be compared with the prestigious diamond. Tungsten carbide as a grain refiner , Can significantly improve the performance of the alloy, the amount of tungsten carbide carbide production to 0.5-5%.
Development and Application of Thermal Spraying Technology in Foreign Countries
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).
cemented carbide rods Production of high manganese steel hammer method and process
Mold hole (suitable for wood mold, sand mold and lost mode) → welding nails (welding rod with TIG welding, the purpose of welding nails is fixed bar) → bar into the mold ( Suitable for wood mold, sand mold and EPC) → model coating (coating 3 times drying 3 times) → casting and sealing stereotypes → surface treatment.

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