News

According to the "Interim Measures for the Acceptance of Environmental Protection for the Completion of Construction Projects", the information on the acceptance of environmental protection for the completion of the project is hereby publicized as follows: Basic Information of 1. Project Project Name: Linhai Xingye Precision Casting Co., Ltd. annual output of 4500 tons of steel castings relocation project Construction unit: Linhai Xingye Precision Casting Co., Ltd. Project construction site: No. 508 Zhexi Road, Datian Street, Linhai City Construction content: annual output of 4500 tons of steel castings relocation project Contact: Ms. Xu Telephone: 15958620996 Main matters 2. soliciting public opinions In order to listen to the opinions and suggestions of all walks of life on the environmental protection work of the project, the acceptance report of the project is publicized (see the annex for details) to solicit valuable ideas and suggestions from the public. The public can express their opinions and opinions on the environmental protection acceptance of the project completion by sending phone calls or interviews. The time for the public to raise or reflect relevant issues is within 20 working days (2023.6.27-2023.7.24) after the information is publicized. The public who express their opinions should indicate the date of publication, real name and contact information so as to give feedback as needed.

Recently, China's forging industry ushered in a major breakthrough. According to the latest news, a well-known Chinese steel company has successfully developed a subversive forging technology, which has brought great changes to the industry. It is reported that this technology uses advanced materials and processes, which can simplify the original complex forging process and improve efficiency. Through this new forging technology, the traditional manufacturing industry will be greatly improved, and the quality and performance of the products will be significantly improved. This breakthrough is of great significance to China's manufacturing industry. China has always been the world's largest steel producer, and forging as an important part of steel processing, its technological improvement will directly promote the development of the entire industry and improve the competitiveness of China's manufacturing industry. Industry insiders have said that the advent of this new technology will inject new vitality into China's forging industry. At the same time, it will also promote China to play a more important role in the global manufacturing industry.

1. Eliminate the stress caused by thermal expansion and contraction inside the casting, reduce the deformation after machining, reduce the surface hardness, and improve the machining conditions; 2. Improve its crystalline structure and enhance the formation and stability of spherical carbon crystallization; forgings are generally strength components, and most of their materials are high-strength medium carbon steel. 3. Forging shell to take annealing or quenching and tempering heat treatment, so that its mechanical properties are more superior, both better strength, and better elasticity; 4. Weldment materials are mostly low carbon steel with good weldability. The weld may be due to the large rigidity of the workpiece, fast cooling, and brittle tissue in the internal crystallization of the weld. Therefore, after welding or during welding, the weld itself is used to reasonably arrange the weld and heat treat the weld and the heat affected zone. 5. The heat treatment of welding parts is often preheated before welding, and slowly cooled with asbestos cloth after welding to achieve the purpose of annealing treatment. Its function is mainly to reduce the internal stress of the workpiece, improve the crystallization organization of the weld, reduce the formation of the martensite organization with brittle tendency, and prevent welding cracks.

Forging is a processing method that uses forging machinery to apply pressure to metal blanks to produce plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. Forging (forging and stamping) is one of the two major components. Forging can eliminate the defects such as loose casting in the smelting process and optimize the microstructure. At the same time, due to the preservation of the complete metal flow line, the mechanical properties of forgings are generally better than castings of the same material. Related machinery in high load, severe working conditions of important parts, in addition to the shape of a relatively simple available rolling plates, profiles or weldments, the use of forgings. According to the forming mechanism, forging can be divided into free forging, die forging, grinding ring, special forging. Features of free forging: Improve the organizational structure and mechanical properties. Through forging, the coarse grain structure inside the metal is broken: pores, shrinkage holes, cracks and other defects are pressed together to improve the density, the fiber flow line of the metal is reasonably distributed on the forging section, and the mechanical properties of the metal are improved. Low cost and reasonable economy. Good versatility of forging equipment and tools, short production preparation cycle, easy to replace products. The process is flexible and adaptable. Low dimensional accuracy of forgings. Free forging is mainly used in the production of single-piece small batch, shape is not too complex, dimensional accuracy requirements are not high forgings and some large forgings. free forging of equipment: The air hammer has simple structure, flexible operation, convenient maintenance but small hammering force Hydraulic press, hydraulic press is under static pressure to produce plastic deformation of the blank, stable work, low noise, good working conditions, resulting in greater pressure, but the equipment is large, complex structure, expensive. Two kinds of equipment are no overload damage problem, but if the equipment tonnage selection is too small, the forging internal forging is not through, and the productivity is low, on the contrary, if the equipment tonnage selection is too large, the waste of human and financial resources. The choice of forging equipment is mainly related to the deformation area, forging material and deformation temperature. It can be used for pier rough drawing, long punching, reaming, bending, etc. Determination of the initial forging temperature: Under the premise of no overheating, overburning and other heating defects, the initial forging temperature should be increased as much as possible to make the metal have good forgeability. The initial forging temperature is generally controlled at 150-250°C below the solidus. Die forging is divided into open die forging and closed die forging. Die forging definition: the method of forging a heated blank in a die fixed on a die forging equipment is called die forging. Die forging is the main process method of forging using special forging dies to obtain forgings of the required shape and size. The characteristics of die forging are: under the action of forging press, the blank is forced to plastic flow forming in the forging die cavity, so as to obtain forgings with better quality than free forging.

Carbon steel refers to steel with a carbon content of between 0.08 and 0.8 percent, which has the characteristics of low price, good processing performance and moderate mechanical properties. The market demand for carbon steel mainly comes from construction, manufacturing, energy and other industries. At present, the global carbon steel market is huge, but the market competition is fierce. China is the world's largest producer of carbon steel, but the price of carbon steel is on a downward trend due to increased competition in the market. In addition, the pressure of environmental protection has also had a certain impact on the carbon steel market, prompting some enterprises to increase technological transformation and green production.