There is a certain relationship between paint density and concentration. The density of the casting coating can be measured with a graduated cylinder weighing method or by a Baumemeter, but the reading of the Baumemeter is greatly affected by the viscosity of the casting coating. ...
This article introduces common valve steel casting defects and repair welding methods. Scientific repair welding of steel casting defects is an energy-saving remanufacturing engineering technology. This article gives a detailed explanation on the judgment and elimination of defects. Give answers to ...
After quenching, the strength, hardness and wear resistance of steel parts can be improved, but the original size or shape of the workpiece will undergo undesirable changes during quenching. This change will become a defect that affects product quality, reduce or avoid These defects, first of all, w ...
In the traditional production process of ductile iron, about 10% of carbon scrap is generally used for ingredients. This article only deals with some issues that should be paid special attention to in the production process after increasing the proportion of carbon scrap used in the production of du ...
Using lost foam to produce precision casting, the carbon content of iron castings is close to saturation, and the concentration gradient of carbon between gas phase and precision casting is very small, and free carbon in the gas phase is not easy to migrate and diffuse to the surface of the casting. ...
The cooling water consumption is large when casting with the old mold, because the water supply of the old mold is not closed, part of the cooling water is open to the cooling effect, and the cooling intensity of the primary cooling and the secondary cooling is different, which is unavoidable. ...
Impregnation treatment of parts made of lightweight materials such as aluminum cylinders can effectively reduce the scrap rate of workpieces and significantly improve their quality. On the premise of ensuring product quality, they can effectively reduce manufacturing costs and improve production eff ...
The brake drum is a security part, it relates to the safety of human life and property, and at the same time it is a vulnerable and consumable part. The market demand is particularly large.At present, the domestic annual output is about 10 million or more. Because the product structure is relatively ...
Nitriding and carburizing treatment on the surface of steel products can improve the mechanical properties of the surface of steel products. Stainless steel with excellent corrosion resistance containing Cr has the problem of poor wear resistance. ...
Chilled iron is a metal body placed outside the shell of precision castings; in the casting process, the metal is often placed on the sand mold, sand core surface or cavity of sand castings; chilled iron can prevent shrinkage and porosity of castings and ensure castings Quality plays a more importan ...
The effect of nitrogen content on the mechanical properties of 500MPa grade VN microalloyed high-strength steel bars was studied through production tests. The results showed that the nitrogen content increased from 81PPM to 269PPM, the grain size of the steel bars did not change significantly, and t ...
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The thread cutting process depends on the structure of the machined parts and the CNC machine tool u
Oval gears are widely used in automatic machinery and instrument industries, and are a type of non-c
The cylinder telescopic sheath is a protective component that is installed on the oil cylinder, cyli
The manufacturing cycle is long. Operators are prone to fatigue. Once a failure occurs, it often tak
The Wu Steel Works has two workshops, one steelmaking workshop and the second steelmaking workshop.