Metal components often require surface treatment to meet the requirements of working conditions. Nitriding is a process in which nitrogen is diffused into the surface of steel to form a nitrogen-rich hardened layer. It is achieved by using active nitrogen atoms produced from the decomposition of ammonia at a certain temperature (usually 500-600℃) to penetrate and diffuse into the surface layer of steel, forming iron-nitrogen alloys, thereby altering the mechanical properties of the steel surface, such as enhancing wear resistance, increasing hardness, and improving corrosion resistance. The principle is that at a certain temperature, the medium is activated to produce nitrogen atoms that penetrate the surface layer of the workpiece, thereby forming different composition structures with Fe and alloy elements in a continuous depth near the surface, changing the hardness, thermal stability, and density of the surface layer. However, since the effect of the nitriding process is not visible to the naked eye and the finished parts cannot be destroyed, quality inspections must be conducted in advance on nitriding samples under different process conditions.

The main cause of recrystallization in titanium alloy is the influence of temperature. When titanium alloy is at high temperatures, atoms at the grain boundaries and within the grains will diffuse, forming larger grains

Carburizing treatment refers to the process of heating and holding steel parts in a carburizing medium to increase the carbon content of the surface layer and form a certain carbon concentration gradient, allowing carbon atoms to penetrate into the surface layer of the steel. This can give low-carbon steel parts a high-carbon steel surface layer. After quenching and low-temperature tempering, the surface layer of the workpiece has high hardness and wear resistance, while the central part of the workpiece still retains the toughness and plasticity of low-carbon steel.

Pipe fittings, as an important component of pipeline systems, have a wide range of uses, covering multiple fields such as construction, industry, agriculture, and transportation. Let's take a detailed look at the specific applications of pipe fittings in different fields.

Spheroidizing agent is a certain metal or alloy added to molten iron to obtain ductile iron with spherical graphite. Its main purpose is to transform the graphite morphology in cast iron from flake to spherical, thereby enhancing the mechanical properties, toughness and plasticity of cast iron. The spherical graphite in ductile iron is formed after spheroidization treatment. This form of graphite makes the strength of cast iron much higher than that of gray cast iron, and its toughness is better than that of malleable cast iron, while still maintaining a series of advantages of gray cast iron.

Excessive or insufficient temperature: During the melting process, if the temperature is too high, elements such as iron and silicon in the molten metal will react with oxygen in the air, generating oxides and forming bubbles; conversely, if the temperature is too low, it may lead to poor fluidity of the molten metal and difficulty in gas expulsion.

Metal materials is a discipline full of mysteries. Whether it is the materials needed for tool manufacturing itself or the processing of parts, one will encounter material issues. If you are engaged in the steel industry, have you ever noticed what the chemical components listed in the steel test report actually mean? You may only know that different grades of steel have many different chemical components and different contents of elements. In this article, we have sorted out and listed 21 chemical elements and their influence on the performance of steel.

Grain refinement of metals is one of the important means to improve the performance of metallic materials. By refining grains, the strength, hardness, plasticity and toughness of metals can be significantly enhanced, their comprehensive mechanical properties can be improved, processing performance can be optimized, and even positive impacts can be made on the corrosion resistance and thermal stability of materials. This article will introduce in detail several main methods of grain refinement of metals and their principles.

The working principle of a gear pump is that it is a rotary pump that conveys liquids or increases their pressure by the change in the working volume formed between the pump cylinder and the meshing gears. Its working principle is as follows: Suction process: When the driving gear of the gear pump rotates, it drives the driven gear to rotate together. On the suction side, the gears gradually disengage from meshing, the sealed volume increases, and a local vacuum is formed. Under the action of external atmospheric pressure or gravity, the liquid enters the tooth grooves through the pump inlet. Conveying process: As the gears rotate, the liquid in the suction teeth is carried to the other side and enters the discharge chamber. Discharge process: On the discharge side, the gears engage, the sealed volume gradually decreases, and the liquid is squeezed and discharged from the pump outlet. Sealing and isolation: The meshing line of the gears separates the suction chamber from the discharge chamber, preventing liquid backflow and maintaining the pressure difference.

The production and quality control of gears used in forged gear pumps is a complex and meticulous process, involving multiple stages and strict standards. The following is a detailed elaboration of this process:

CNC machining plays a pivotal role in crafting high-quality transmission shafts by delivering precision, consistency, and efficiency. These components, essential for transferring power in machinery, demand tight tolerances and flawless finishes to ensure durability and performance. CNC machining achieves this through advanced automation, minimizing human error and enabling complex geometries. At VIGOR INNO-TECH Limited, with over 18 years of expertise in castings and forgings, we understand the critical nature of transmission shafts. Our team leverages CNC technology to analyze structures, design processes, and control risks, ensuring optimal quality and efficiency. This approach guarantees that every transmission shaft meets global standards for hot working processes, enhancing reliability across industries.