Among the various corrosions of stainless steel, the intergranular corrosion accounts for about 10%. It will reduce the bonding force between the grains. Under the action of stress, it is easy to crac...
Improving the cleanliness of the cast slab is the basis for the production of high-quality steel, and the total oxygen content of the cast slab is an important measure of the cleanliness of the molten...
1.1 Overview In 1958, H.F. Shroyer invented the technology of making metal castings with expandable foam plastic models and obtained a patent. The model used at first was made of polystyrene (EP...
Generally, clean steel refers to a steel grade that has a low content of five major impurity elements (S, P, H, O, N) in steel, and strictly controls non-metallic inclusions (oxides, sulf...
As a measure to reduce the friction between automobile engine parts, it can be roughly divided into the following three types. One is to reduce the actual contact area between components; The second i...
Oxidized pellets have good mechanical strength and metallurgical properties, and have become an indispensable high-quality charge for blast furnace ironmaking. However, the lack of domestic supply of ...
As we all know, the hydrogen in the material will be trapped at various trap positions (dislocations, grain boundaries, precipitates and inclusions, etc.). The heating analysis method is a very import...
In the design process of aluminum alloy die castings, many customers are uncertain about the thickness of aluminum alloy die castings, and they do not know how thin the thickness of aluminum alloy die...
According to the introduction of precision Cnc Machining manufacturers, the large-scale CNC machining parts are made of bar materials, and the process plan of rough machining and finishing is adopted....
It is necessary for a professional foundry person to know this scrap knowledge! Scrap steel is a general term for ferrous metal scrap in scrap metal recycling. It includes several categories suc...
One table to understand the heat treatment of steel products: Name Heat treatment process Purpose of heat treatment 1. Annealing Heat the steel to a certain temperature, keep it for a certain time, an...
1. Appearance, size and fit of the molded product 1. Defects on the product surface are not allowed: lack of material, burnt, top white, white line, peaking, blistering, whitening (or cracking, ...
1. Stoma This is a small cavity formed by the gas that has not escaped during the solidification process of the metal. Its inner wall is smooth, contains gas, and has a high reflec...
Carburizing and quenching is actually a composite process, namely carburizing + quenching. We are often used to talk about the two together, because the two processes that are completed ...
1. Graphitization process of cast iron The formation process of graphite in cast iron is called graphitization process. The basic process of the structure of cast iron is the forma...
The 690 alloy tube used for the steam generator heat transfer tube of nuclear power plant bears the corrosion of high temperature, high pressure and water medium, alloy grain size, intergranular...
Duplex stainless steel has the same proportion of ferrite and austenite, and has excellent mechanical properties and corrosion resistance. It is widely used in petrochemical, transportati...
1. 45-high-quality carbon structural steel, the most commonly used medium-carbon quenched and tempered steel Main features: The most commonly used medium carbon quenched and tempered steel, with...
In this type of enterprise, the employees are tired, and the boss is even more tired. They are all working hard for the future of the company, and they have also thought of many ne...
Calculation Formula The calculation formula for the selection of die-casting machine: Die-casting machine clamping force (t) = 1.4 * casting projected area * ratio of the projected area of the Die C...