C Carbon Cr Chromium W Tungsten Mn Manganese Si Silicon V Vanadium 0.95 0.5 0.5 1.1 0.3 0.1 M238 factory specifications: hardened and tempered to 980-1080N/mm²(30-34HRC). Characteristics of M...
Quenching cracks are closely related to the type of heating furnace. The vacuum furnace is least likely to cause quenching cracks. The following are arranged in order of the difficulty and difficulty ...
I. Introduction With the development of urban construction, the improvement of people’s living standards has put forward higher requirements for drinking water quality. At the same time, in orde...
With the rapid development of my country’s steel industry, domestic iron ore resources are becoming increasingly scarce, and the available iron ore resources are becoming increasingly poor, fine...
%: C: 2.03 Si: 4.0 Mn: 7.0 Cr: 6.5 Mo: 10.5 V: 6.5 Good grinding performance Good heat treatment dimensional stability Good toughness Very good red hardness Very good wear resistance ASP60 steel is es...
Surface quenching only heat-treats the surface or part of the surface of the workpiece, so only the surface structure is changed. The structure in the core or other parts still retains its original pr...
With the development of the steel industry and chemical industry, the uses of super iron concentrate are becoming more and more extensive. Research and development of super iron concentrate have becom...
The ilmenite ore is located in Chengde City, Hebei Province. It is a high-phosphorus, low-sulfur, lean ore with a TiO2 grade of 7.31%. In view of the characteristics of this ore, the author conducted ...
C Carbon Cr Chromium V Vanadium Mo Molybdenum Mn Manganese Si Silicon 1.55 11.5 1.0 0.7 0.4 0.3 K110 factory condition: soft melting to 250HB (maximum) Annealing specifications: annealing temperature ...
In direct rolling, the high-temperature steel billets produced in the roughing mill directly enter the finished rolling mill and are rolled into finished products. Its main advantages are: utilizing t...
1 Resource reserves and production situation Shandong Province currently has 8 iron ore mines at or above the provincial level, including 1 central enterprise. In 2003, the total mining (stripping) vo...
DAC55 steel is improved on the basis of DAC (SKD61). The most suitable hardness for use after tempering is HRC40-44 The machinability is very good, easy to process, and shortens the mold making time...
Homogenizing annealing is an annealing process in which an ingot or casting of a certain alloy is heated to a higher temperature below the solidus line of the alloy, kept warm for a long time, and the...
Many domestic iron ore concentrators are on the verge of small profits and losses due to backward beneficiation technology, outdated and crude equipment, and small scale of manufacturers. Since 2003, ...
At present, the Water Supply and Drainage Products Standardization Committee of the Ministry of Construction has organized experts to review and pass two industry standards for thin-walled stainless s...
Ultrasonic welding uses a sonotrode to emit high-frequency ultrasonic oscillations between two welding parts under pressure, causing strong friction on the surface of the welding parts, removing surfa...
The 2006 Beijing Energy Conservation and Environmental Protection Exhibition, hosted by the Beijing Municipal Government and hosted by the Beijing Municipal Development and Reform Commission, opened o...
The carbon content of this steel is above 0.4%, and it has excellent wear resistance, but its ductility is reduced, and it is easy to deform and crack after quenching. Therefore, heat treatment is ext...
SLD steel is a high carbon, high chromium alloy steel with extremely high hardness and suitable toughness, and has a tempering hardening effect. It is a typical wind hardened steel and is currently an...
Aluminum alloy materials are widely used in modern industrial production, especially in air separation devices. It is a commonly used process pipe material. Due to the unique characteristics of alumin...
1. The green design principle of hydraulic systems incorporates environmental principles based on the technical principles, cost principles, and ergonomic principles commonly used in traditional hydra...
In the process of sulfuric acid production, the slag generated by roasting pyrite contains iron oxide and remaining ferrous sulfide, as well as a few components such as copper, lead, zinc, arsenic, an...
High temperature tensile test can be conducted on steel plates with a thickness greater than 20mm according to the special requirements of the purchaser and agreement between the supply and demand par...
C carbon, Si silicon, Cr chromium, Mn manganese, Mo molybdenum, V vanadium, S sulfur, 0.40 0.80 13.50 0.50 0.60 0.20 0.03, excellent corrosion resistance, excellent polishing and polishing properties,...
The ore in the primary zone of Fenghuangshan Copper Mine belongs to a mixed ore of a symbiotic combination of chalcopyrite pyrite magnetite siderite hematite. The original design process of the benefi...
With the rapid development of China’s steel industry, the output of converter slag, as a derivative of the steelmaking process, has also significantly increased. The amount of converter slag is ...
The oxygen content of molten steel at the end point of blowing is also known as the oxidizability of molten steel. The oxidizability of molten steel has an important impact on the quality of steel, al...
High red heat hardness, high wear resistance and laser cutting ability, high impact toughness, fine and uniform grain size, high toughness. Tool industry: scraper, hobbing cutter, iron knife, drill bi...
1、 Preface The steel industry is a major consumer of resources and power, accounting for approximately 14% of the country’s energy consumption, and is also a major emitter of pollutants. Therefo...
The layout of large section steel and rail beam roll forging is a horizontal type, with the first column being a 2-roll reversible roughing mill, the second column being a 3-roll irreversible rolling ...
3.1 Construction conditions 3.1.1 General provisions a. Design drawings and other technical documents are complete and have been jointly reviewed; b. Technical briefings have been made according to th...
1. Overview (1) Five-layer structure steel-plastic composite pipe. The five-layer structure steel-plastic composite pipe organically combines the advantages of high strength, strong pressure-bearing c...
Factory state: soft melting to 225HB (maximum) Steel characteristics: High chromium stainless steel with acid resistance. After quenching, the mold is extremely wear-resistant and has excellent cuttin...
1. Overview of standard projects In recent years, my country’s large-diameter plastic pipes have developed very rapidly, and there has been an upsurge in investing in the production of large-dia...
In order to improve the wear resistance and corrosion resistance of the plastic mold surface, appropriate surface treatment is often performed on it. 1. Chrome plating of plastic molds is the most wid...
4Cr5MoSiV1 steel is an air-cooling hardened hot work die steel and one of the most widely used steel grades among all hot work die steels. Compared with 4Cr5MoSiV steel, this steel has higher thermal ...