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The machinability of metal materials usually refers to a kind of performance or quality that can be clearly defined and measured as a sign of its machinability. Generally speaking, good machinability should be: good tool durability or high cutting speed under ......

Different kinds of projectiles:1. The hardness of cast steel shot is generally 40 ~ 50HRC. When processing hard metal, the hardness can be increased to 57 ~ 62Hrc. Cast steel shot has good toughness and is widely used. Its service life is several times that of......

 Technological processHeat treatment process generally includes three processes: heating, heat preservation and cooling. Sometimes there are only two processes: heating and cooling. These processes are interconnected and uninterrupted. (heating)When the meta......

1. Impregnation method:stainless steel pipeline, elbow and small parts are most suitable for this method, and the treatment effect is the best. Because the treated parts can be fully immersed in pickling and passivation solution, the surface reaction is compl......

The corrosion resistance of stainless steel is mainly due to the addition of a high content of Cr element in the steel. Cr element is easy to oxidize and can quickly form a dense Cr2O3 oxide film on the surface of the steel. The corrosion resistance of stainle......

In the actual operation of flange joint, bolt force relaxation is inevitable, and the bolt force of initial tightening will always drop with time. Especially for flange joints under high temperature and severe cycle conditions, after 10000 hours of operation, ......

Carbon steel is divided into:①Mild steel with carbon content less than 0.25%;② Medium carbon steel with carbon content of 0.25% ~ 0.6%;③ High carbon steel with carbon content greater than 0.6%.Mild steel is a carbon steel with carbon content less than 0.25%......

P is brought into steel by ore. generally speaking, phosphorus is also a harmful element. Although phosphorus can increase the strength and hardness of steel, it can significantly reduce the plasticity and impact toughness. Especially at low temperature, it ma......

C is the main element second only to iron, which directly affects the strength, plasticity, toughness and weldability of steel.When the carbon content in steel is below 0.8%, the strength and hardness of steel increase, while the plasticity and toughness decre......

Low finned tube high efficiency heat exchangerThe low finned tube of the low finned tube heat exchanger is a special tube whose outer surface is rolled into threaded fins. The low finned tube not only increases the heat exchange area, but also divides the flui......

Bellows high efficiency heat exchangerThe heat exchange tube of corrugated tube high-efficiency heat exchanger is a corrugated special tube inside and outside the tube. The convex corrugated surface inside and outside the bellows makes the fluid in the boundar......

Wound tube high efficiency heat exchangerWound tube heat exchanger is a new type of high efficiency heat exchanger with compact structure and high heat transfer efficiency. The heat exchange tubes are alternately wound between the core cylinder and the outer c......

Is there such a strange building around you: it is a solid steel structure, but its whole body is covered with thick red and black rust. That's weathering steel.Weathering steel, also known as atmospheric corrosion-resistant steel, is a low-alloy steel between......

Gasket is an important component of flange sealThe gasket is used to seal the gap between the two French sealing surfaces and prevent fluid leakage.Suitable flange gasket material requires that the gasket can produce necessary elastic deformation without being......

Bolt preloadThe preload must compress the gasket to achieve the initial seal. Properly increasing the bolt preload can increase the sealing capacity of the gasket, because increasing the preload can keep a large contact surface specific pressure of the gasket ......

Stainless steel heat exchange tube is a device made of stainless steel. It is one of the components of heat exchanger. It is placed in the cylinder for heat exchange between two media.Stainless steel heat exchange tube have the following advantages:1. Stainles......

The contact surface with gasket placed between flanges and compressed to play a sealing role is called flange sealing surface or compression surface. The selection of sealing surface type is related to operating conditions, consequences of leakage and the natu......

Heat exchanger is widely used in chemical industry, petroleum industry, electric power industry, food industry and many other industries. It accounts for about 40% of the equipment investment in petrochemical plants. It is a key chemical equipment. At the same......

Stainless steel stainless element is chromium, so how does nickel contribute to stainless steel?The stainless steel containing nickel has the best resistance to crevice corrosionCrevice corrosion is almost eliminated by adding nickelNickel stainless steel has ......

How are all kinds of metals formed? Let's take a look at the other six ways1. MachiningMachining: in the production process of parts, cutting off the thickness of excess metal layer on the blank directly with the cutter to meet the technical requirements of di......

01 CastingLiquid metal is poured into the mold cavity which is suitable for the shape and size of the part, and then cooled and solidified to obtain the blank or part, which is usually called liquid metal forming or casting. Casting can be divided into sand ca......

Due to the different application fields of industrial grade metal pipes, the required surface treatment processes are also different. Let's take a look at several common treatment processesPickling surfaceAcid pickling is a method of using acid solution to rem......

The 20th century is a century of rapid development of modern science and technology, one of the important signs is the brilliant achievements of human beings in the field of aerospace. In the 21st century, aerospace has shown a broader development prospect, an......

The heat treatment of stainless steel pipe is an indispensable part of MTSCO production, so what are the ways and functions of heat treatment?The results of Cr, Ni and other alloy elements in austenitic stainless steel reduce MS point to below room temperature......