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...
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...
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...
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...
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...
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. 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. 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...
Any corporate meeting should look like a lady’s skirt, the shorter the better. In fact, many corporate meetings are like shrouds, long and useless, and the biggest effect is a waste of tim...
I. Introduction Due to changes in production conditions and the environment, other parameters of the casting will inevitably change. If the molding sand process cannot be adjusted ...
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...
1 The solidification characteristics of ductile iron The different solidification methods of nodular cast iron and gray cast iron are caused by the different growth methods of nodular graphite and fla...
Three roles of team leader The team leader in the workshop is the main communication bridge between the company and the production staff. The management of the company team leader...
TP-01 Build a system to prevent all disasters, failures, defects, and waste TP-02 Eliminate all losses and wastes of equipment, so that the equipment reaches the highest efficiency TP-03 From the top ...
The tool changes the process to a certain extent. As a tool for needles and brains, if we understand its performance and use it correctly, and then improve the machining technology...
The normal blast furnace operation type is characterized by smooth inner wall surface and stable slag skin. However, in actual blast furnace production, due to the influence of cha...
The generation of subcutaneous pores is a comprehensive reaction of improper operation of various links and procedures in the casting process. The reasons for formation are complex, and ...
In recent years, the acceleration of the globalization of the world economy has provided opportunities for the development of my country’s foundry industry, and the de...
Continuously improving the dimensional accuracy of investment castings and reducing waste products caused by oversize has always been one of the main goals pursued by investment casting ...
1 What are the factors that affect the “aging” of water glass? How to eliminate the “aging” of water glass? The freshly prepared water glass is a true solution. However,...
Dreams are beautiful, but reality is cruel. If a small company, especially a small company in the early stage of starting a business, mechanically adopts the management mod...
In recent years, the acceleration of the globalization of the world economy has provided opportunities for the development of my country’s foundry industry, and the demand for castings has shown...
Transmission case die casting automation case: The robot will first scoop a spoonful of aluminum alloy stock solution, then pour the raw materials into the die-casting machine, and then wait for the d...
casting cleaning is one of the necessary production processes for any foundry. In addition to the type of casting such as size, shape, weight, production speed, capacity requirements, etc., which will...
Through the research on the casting process and material of the rolling plate of the medium and heavy plate cooling bed, a new method of making roulette iron castings with multiple stacks of metal res...