Lost foam casting
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...
Forging technology talk
Forging is the collective name of forging and stamping. It is a forming and processing method that uses the hammer, anvil, punch of the forging machine or the die to apply pressure to the blank...
Innovation and Practice of Hot Metal Pretreatment Technology
Shougang International Engineering Co., Ltd. has a number of patented technologies for molten iron dephosphorization and desulphurization and slagging, which can combine with the individ...
Control of Intergranular Corrosion of Austenitic Stainless Steel
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...
Method of reducing total oxygen in slab
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...
Measures to reduce the content of hydrogen, oxygen and nitrogen in steel
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...
How to determine the thickness of aluminum alloy die castings?
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...
Precision CNC machining manufacturers explain how CNC CNC lathes are processed
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!
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
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...
The most complete mold acceptance standard in history!
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, ...
Analysis and Improvement of Common Defects of Valve Castings
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 reflectivity to ultrasonic...
Collection of common defects and preventive measures in carburizing and quenching
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 ...
How To Calculate Pressure Die Casting Tonnage
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...