42CrMo seamless steel pipe is an important industrial material, widely used in petroleum, chemical industry, natural gas transportation, and other fields. 42CrMo seamless steel pipe implements the standards GB/T8162 seamless steel pipe for structure, GB/T8163 seamless steel pipe for fluid transportation, GB/T18248 seamless steel pipe for gas cylinder, GB/T28884 seamless steel pipe for large volume gas cylinder
①Chemical composition: carbon C: 0.38~0.45%, silicon Si: 0.17~0.37%, manganese Mn: 0.50~0.80%, sulfur S: allowable residual content ≤0.035%, phosphorus P: allowable residual content ≤0.035%, chromium Cr: 0.90~1.20%, nickel Ni: allowable residual content ≤0.30%, copper Cu: allowable residual content ≤0.30%, molybdenum Mo: 0.15~0.25%,
②Product specifications: outer diameter 57mm~762mm, wall thickness 3.0~120mm,
③42CrMo mechanical properties: tensile strength σb (MPa): ≥1080(110), yield strength σs (MPa): ≥930(95), elongation δ5 (%): ≥12, cross-sectional shrinkage ψ (%): ≥45, impact energy Akv (J): ≥63, impact toughness value αkv (J/cm2): ≥78(8), hardness: ≤217HBW
First, the production process of 42CrMo alloy seamless steel pipe
The production process of 42CrMo seamless steel pipe mainly includes tube blank preparation, perforation, rolling, heat treatment, straightening, cutting, and other links. Among them, the preparation of tube blank is the first step in the production of seamless steel pipe, which is usually prepared by continuous casting or die casting. The perforation link is to pierce the tube blank into a rough tube, and the rolling link is to roll the rough tube into a steel pipe with a specified wall thickness. The heat treatment link is to eliminate the internal stress of the steel pipe and improve the mechanical properties and corrosion resistance of the steel pipe. Finally, after straightening and cutting, the finished 42CrMo seamless steel pipe can be obtained.
Second, the performance characteristics of 42CrMo alloy seamless steel pipe
42CrMo seamless steel pipe has excellent mechanical properties and corrosion resistance. Its main characteristics are as follows:
1. High strength: 42CrMo seamless steel pipe has high yield strength and tensile strength, and can withstand greater pressure and load.
2. Good toughness: 42CrMo seamless steel pipe has excellent impact toughness, bending toughness, and other properties, and can maintain good stability in harsh working environments.
3. Good corrosion resistance: 42CrMo seamless steel pipe has good corrosion resistance after a special heat treatment process, and can be used for a long time in corrosive media such as acid and alkali.
4. High-precision size and surface quality: 42CrMo seamless steel pipe has advanced production technology, high dimensional accuracy, good surface quality, and can meet various high-precision requirements.
Third, the application field of 42CrMo alloy seamless steel pipe
42CrMo seamless steel pipe is widely used in petroleum, chemical industry, natural gas transportation, boiler manufacturing, machinery manufacturing, and other fields due to its excellent performance. In the field of petroleum and chemical industry, 42CrMo seamless steel pipe is used as the main material for conveying fluid pipelines, reactors, storage tanks, and other equipment. In the field of natural gas transportation, 42CrMo seamless steel pipe is widely used in high-pressure and large-diameter natural gas transmission pipelines due to its high strength and good corrosion resistance. In the field of boiler manufacturing, 42CrMo seamless steel pipe is used to manufacture boiler superheaters, reheaters, economizers, and other components. In addition, 42CrMo seamless steel pipe is also widely used in the field of mechanical manufacturing, such as manufacturing bearings, gears, hydraulic cylinders, and other parts.
Fourth, the future development prospects of 42CrMo alloy seamless steel pipe
With the development of the global economy and the acceleration of the industrialization process, the demand for 42CrMo seamless steel pipe will continue to grow. At the same time, with the continuous advancement of science and technology, the production process and performance of 42CrMo seamless steel pipe will continue to improve. In the future, 42CrMo seamless steel pipe will develop in the direction of higher strength, better corrosion resistance, higher precision, and lower cost.
In addition, with the increasing awareness of environmental protection, green, low-carbon, and environmental protection will become an important development direction of the seamless steel pipe industry. The production process of 42CrMo seamless steel pipe will also gradually achieve green and low-carbonization, reducing the impact on the environment. At the same time, the seamless steel pipe industry will also strengthen exchanges and cooperation with the international market to jointly promote the innovation and development of seamless steel pipe technology.
In short, as an important industrial material, 42CrMo seamless steel pipe will have broad application prospects and huge market potential in future development. With the advancement of science and technology and the improvement of environmental awareness, the performance and production process of 42CrMo seamless steel pipe will continue to improve, making greater contributions to the development of the industrial field.
Post time: Oct-18-2024