2023-10-10 Steel World Comments Off on The difference between surface quenching and chemical heat treatment
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...
2023-10-10 Steel World Comments Off on Technical experiments and technological transformation plans for super iron concentrates
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...
2023-10-10 Steel World Comments Off on Experimental research and development of an ilmenite ore beneficiation in Hebei Province
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 ...
2023-10-10 Steel World Comments Off on What is K110 steel? What are the applications of K110 steel?
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 ...
2023-10-10 Steel World Comments Off on direct rolling
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...
2023-10-10 Steel World Comments Off on Shandong iron ore resource recovery and tailings usage
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...
2023-10-10 Steel World Comments Off on What is DAC55 steel? What are the applications of DAC55 steel?
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...
2023-10-10 Steel World Comments Off on Homogenization annealing
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...
2023-10-10 Steel World Comments Off on What are the methods to improve the grade of iron concentrate?
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, ...
2023-10-10 Steel World Comments Off on Standard specification for thin wall stainless steel water pipes
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...
2023-10-10 Steel World Comments Off on Ultrasonic welding
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...
2023-10-10 Steel World Comments Off on A good way to protect the environment and save energy with water source heat pump units
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...
2023-10-10 Steel World Comments Off on What is S45C steel? What are the application ranges of S45C steel?
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...
2023-10-09 Steel World Comments Off on What is SLD steel? What are the application ranges of SLD steel?
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...
2023-10-09 Steel World Comments Off on Processing and installation of aluminum alloy pipe
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...
2023-10-09 Steel World Comments Off on Analysis on Green Design of Hydraulic System
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...
2023-10-09 Steel World Comments Off on Experimental research and development of comprehensive recovery of iron and gold from sulfur concentrate slag
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...
2023-10-09 Steel World Comments Off on GB 3531-1996 High temperature tensile testing of low alloy steel plates for low-temperature pressure vessels
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...
2023-10-09 Steel World Comments Off on What is S136 steel? What are the application ranges of S136 steel?
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,...
2023-10-09 Steel World Comments Off on Research on Comprehensive Recovery of Siderite
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...
2023-10-09 Steel World Comments Off on Experiment on Dephosphorization of Hot Metal with Converter Slag Pre melting Dephosphorization Agent
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 ...
2023-10-09 Steel World Comments Off on Factors affecting oxygen content in molten steel
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...
2023-10-09 Steel World Comments Off on What is M42 steel? What are the application ranges of M42 steel?
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...
2023-10-09 Steel World Comments Off on Practice of Green Economy in the Development Trend of Qinggang
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...
2023-10-09 Steel World Comments Off on Selection of Rough Roll Materials for Large Section Steel and Rail Beam Rolling Mills
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 ...
2023-10-07 Steel World Comments Off on Construction and acceptance of ABS pipelines
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...
2023-10-07 Steel World Comments Off on Five-layer structure steel-plastic composite pipe socket connection technology
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...
2023-10-07 Steel World Comments Off on What is M310 steel? What are the applications of M310 steel?
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...
2023-10-07 Steel World Comments Off on Industry standard for buried polyethylene structural wall piping systems
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...
2023-10-07 Steel World Comments Off on Surface treatment of plastic mold
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...
2023-10-07 Steel World Comments Off on What is 4Cr5MoSiV1 steel? What are the application ranges of 4Cr5MoSiV1 steel?
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 ...
2023-10-07 Steel World Comments Off on Polyurethane anti-corrosion paint is used in the anti-corrosion of the inner wall of heat exchangers
1 Introduction Heat exchangers are important equipment in the petrochemical industry, accounting for approximately 20% of the plant investment costs and 40% of the total weight of process equipment. D...
2023-10-06 Steel World Comments Off on What is M202 steel? What are the applications of M202 steel?
M202 steel has been heat treated and has a uniform hardness of 278-311HB, 29-33HRC. It will never change shape when made into a mold. It has excellent cutting performance and polishing performance. It...
2023-10-06 Steel World Comments Off on Control and adjustment equipment for effective application of heat
With the reform of the heat metering and charging system, temperature control valves began to be installed on each radiator. Therefore, during heating operation, as the user continuously adjust...
2023-10-06 Steel World Comments Off on Talking about the practical application of conveying pumps in silo slip form construction
Abstract: Using engineering examples, this paper summarizes the application of silo slip form construction technology and the experience in solving post-demould maintenance and other issues. Shuangliu...
2023-10-06 Steel World Comments Off on Airtight cast aluminum alloy
Cast aluminum alloy that can withstand the action of high-pressure gas or liquid without leakage. Used to manufacture high-pressure valves, pump housings and other parts and components working in high...
