Add sulfuric acid to a clean scrubber. If triethylamine is used, the solution must contain 23% sulfuric acid. If the solution is to be prepared in the scrubber, first add water and then slowly add concentrated sulfuric acid, and there should be good agitation, exothermic reaction. ...
The production and usage of austenitic stainless steel account for about 70% of the total output of stainless steel, and it is the most important stainless steel type. Austenitic stainless steel generally contains more elements of Cr and Ni. ...
For this reason, lower carbon content and welding carbon equivalent should be used to focus on the synthesis and heat treatment process of steel; the latter category Do not pay attention to high weldability. Pay attention to the solid solution strengthening mechanism of the steel and the crystal str ...
In addition to iron, carbon and alloy elements, some impurities (such as manganese, silicon, sulfur, phosphorus, non-metallic impurities and some gases, such as nitrogen, hydrogen, oxygen, etc.) will inevitably be brought into the actual steel in the smelting process. These impurities have a great i ...
The multiphase ductile iron grinding ball is a project product developed by the electromechanical repair and fitting factory, and it is an upgraded product of the original low-alloy grinding ball. The mechanical and electrical repairing plant has an annual output of nearly 10,000 tons of this type o ...
Flaw detection of the tension spring: First, pull the spring apart (use a tension machine if necessary) and support it with an insulating rod, so that the spring coils are separated from each other, and then directly energize to check the longitudinal defects on the steel wire. Then, insulate each c ...
When storing large rolling bearings, they can only be placed flat, and the sides of the inner and outer rings should all be supported. If stored upright, the inner and outer rings and rolling parts are heavier, and the inner and outer ring walls are relatively thin, which may cause permanent deforma ...
Studies have shown that different matrix structures have a greater impact on low-temperature impact toughness at different temperatures, and ferritic ductile iron with higher plasticity can obtain higher impact toughness indicators ...
The chemical properties of aluminum are relatively active, and it is easy to chemically react with acids and alkalis, resulting in corrosion, rust spots, blackening, and mildew. Aluminum materials are currently widely used in automobile engines, transmissions, aviation equipment, and other mechanica ...
Another advantage of the investment casting method is that it can cast complex castings of various alloys, especially high-temperature alloy castings. For example, the blade of a jet engine, its streamlined profile and cooling cavity, can hardly be formed by machining technology. Production with inv ...
There are abundant silica sand resources in nature, but there are not too many natural silica sands with high SiO2 content suitable for casting. Since 1951, China has successively carried out general surveys of foundry sand resources within its territory, but mainly limited to the vicinity of main 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.