2021-10-15 Steel World Comments Off on Comparison table of tensile strength and hardness
Tensile strength N / mm2 Vickers Brinell hardness Rockwell hardness Tensile strength N / mm2 Vickers Brinell hardness Rockwell hardness RmHVHBHRCRmHVHB HRC2508076112535033335.52708580.7111536034236.62...
2021-10-15 Steel World Comments Off on Welding process measures and electric soldering iron application method
1. Introduction of electric soldering iron 1. External heating electric soldering iron is generally composed of soldering iron tip, soldering iron core, shell, handle, plug and other parts. The solder...
2021-10-15 Steel World Comments Off on Pipeline automatic welding technology and processing technology control
All-position automatic welding of the pipeline means that when the pipeline is relatively fixed, the welding trolley drives the welding to move around the pipe wall along the track to realize automati...
2021-10-15 Steel World Comments Off on 45# steel heat treatment
Heat treatment process of 45# (number) steel and 40Cr steel quenched and tempered Quenching and tempering is a double heat treatment of quenching and high temperature tempering, and its purpose is to ...
2021-10-15 Steel World Comments Off on Selection and operation of low-voltage high-power inverter
The correct selection of the frequency converter is essential to the normal operation of the electrical control system of mechanical equipment. To choose a frequency converter, first of all, we must c...
2021-10-15 Steel World Comments Off on Application of Cathodic Protection Process in Buried Steel Pipelines
Cathodic protection is one of the electrochemical protection methods in the metal anticorrosion process. It applies an electric current to the protected metal body, so that the electrode potential is ...
2021-10-15 Steel World Comments Off on 45 steel hardness
One method is quenching, which simply increases the hardness, but the toughness is poor and easy to fracture; the second is annealing after quenching to increase the hardness without reducing the toug...
2021-10-15 Steel World Comments Off on Research on the application of high-voltage frequency converter in high-power fan and pump
As we all know, the application of high-voltage motors is extremely wide, and it is the main driving force in industrial and mining enterprises. It is widely used to drive fans, pumps, compressors and...
2021-10-15 Steel World Comments Off on What is the pipeline pressure rating
Pipeline pressure grade Pressure piping components are generally standard parts, so the design of pressure piping components is mainly the selection of its standard parts, and the determination of pip...
2021-10-15 Steel World Comments Off on Steel knowledge: profiles
1. Classification of profiles 1. Simple section steel ①square steel——hot-rolled square steel, cold-drawn square steel; ②round steel——hot-rolled round steel, forged round steel, cold-drawn round steel ...
2021-10-15 Steel World Comments Off on What are the commonly used words for pressure vessels
pipe and tube pipe plate plate rods and bars specification for standard pressure, parts standard pressure components unidentified use of over thickness listed in Section II welded vessels with thickne...
2021-10-15 Steel World Comments Off on What is the steelmaking process flow?
Slagging: the operation of adjusting the composition, alkalinity, viscosity and reaction ability of slag in the production of steel and iron. The purpose is to refine the metal with the required compo...
2021-10-15 Steel World Comments Off on Method for producing crystal glazing for aluminum profile by electrostatic spraying process
With the wide application of aluminum profiles in the decoration industry, the surface treatment technology of aluminum profiles has also developed rapidly. Electrostatic spraying and electrophoresis ...
2021-10-15 Steel World Comments Off on China Petrochemical Corporation Safety Valve Setting Requirements
Sinopec [2001] An Zi No. 30 1.0 General Principle 1.1 Purpose and scope of application 1.1.1 In order to meet the requirements of “Safety valves should generally be checked at least once a year” in th...
2021-10-15 Steel World Comments Off on The application process of the clamp type joint of the fire pipe
Traditional fire-fighting pipeline connection methods (wire connection, welding) gradually exposed some shortcomings in engineering applications over time. A new type of fire-fighting piping interface...
2021-10-15 Steel World Comments Off on Knowledge of zinc alloy die castings
1 Subject content and scope of application This standard specifies the classification, technical requirements, test methods, inspection methods, inspection rules, delivery conditions, etc. of zinc all...
2021-10-15 Steel World Comments Off on Application status and development direction of pipe hydroforming technology
In response to the development trend of lightweight, high-performance, and energy-saving transportation vehicles, the technology of Tube Hydroforming or Internal High Pressure Forming has attracted gr...
2021-10-15 Steel World Comments Off on What is the London Metal Exchange (LME)
The London Metal Exchange is the world’s largest non-ferrous metal exchange. The price and inventory of the London Metal Exchange have an important influence on the production and sales of non-f...
2021-10-15 Steel World Comments Off on Trend analysis of new plastic water supply pipes instead of galvanized steel pipes
The replacement of galvanized steel pipes with new plastic water supply pipes is also a general trend. Now I will make a simple analysis of the product quality control, quality inspection and its in...
2021-10-15 Steel World Comments Off on Installation and inspection standards for industrial pipeline engineering (7)
The People’s Republic of China National Standard Industrial Metal Pipeline Engineering Construction and Acceptance Specification GB 50235-97 Article Description Revision Description This specification...
2021-10-15 Steel World Comments Off on Galvanized steel sheet
1. Overview (1) Definition: In order to prevent corrosion on the surface of the steel plate and prolong its service life, a layer of metallic zinc is coated on the surface of the steel plate. This kin...
2021-10-15 Steel World Comments Off on What are the technical standards for stainless steel electrodes
1. Subject content and scope of application This standard specifies the type classification, technical requirements, test methods and inspection rules of stainless steel electrodes. This standard appl...
2021-10-15 Steel World Comments Off on Application of Rotary Valve in Refining and Chemical Equipment
1. The characteristics of rotary valves. Valves are usually divided into two categories: linear and rotary. The straight-stroke valve allows or cuts off the flow of material through a linear movin...
2021-10-15 Steel World Comments Off on Hot-dip galvanized steel sheet for household appliances
Traditional steel used in the production of household appliances is mainly electro-galvanized steel. In recent years, with the continuous improvement of the mechanical properties and surface quality o...
2021-10-15 Steel World Comments Off on Understanding the significance of valve characteristics
In the fluid piping system, the valve is the control element, and its main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and drain the pressure....
2021-10-15 Steel World Comments Off on What are the types of stainless steel development
Stainless steel usually refers to steel that can resist corrosion in the atmosphere or some chemical media. According to the characteristics of the structure, it can be divided into five categories: m...
2021-10-15 Steel World Comments Off on Rare earth has broad prospects in the application of steel coatings
“The application prospect of rare earth in steel and metal product coatings is very broad, and the potential market is extremely huge. We should speed up research and development, promot...
2021-10-15 Steel World Comments Off on Modern degaussing measures before Russian pipeline welding
The modern degaussing method before Russian pipeline welding is compiled by Xu Guizhi (Nanjing Aviation Accessories Factory 210002). The reason for the remanence in steel pipe and its influence on wel...
2021-10-15 Steel World Comments Off on Research on beneficiation technology of ilmenite in a certain place
Guangxi Bama Tianrun Titanium Industry Co., Ltd. is located in Bama County, Guangxi. It is a well-known ilmenite deposit in western Guangxi and even in China. The ilmenite deposit in this area has bee...
2021-10-15 Steel World Comments Off on What are the iron ore tailings application technology
Tailings are waste after beneficiation, and the main component of industrial solid waste. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged every...
2021-10-15 Steel World Comments Off on Corrosion-resistant alloy cold-rolled drawn seamless pipe (GB/T15011-1994)
(1) For dimensions and specifications, see Table 8-54. Table 8-54 Dimensions and specifications of corrosion-resistant alloy cold-rolled (drawn) seamless pipe (mm) Wall thickness diameter (2) The allo...
2021-10-15 Steel World Comments Off on Discuss how to ensure the quality of NdFeB permanent magnet materials in the production of “four defenses” work
The sintered NdFeB permanent magnet material is manufactured by powder metallurgy. The process flow is as follows: raw material processing → batching → smelting → powder making → magnetic field orient...
2021-10-15 Steel World Comments Off on Introduction to the specification of surface condition of stainless steel at home and abroad
Specification , , Routing , , main content , , , , NO.1 , , Hot rolling, annealing, descaling , , After hot rolling to a specified thickness, it is then annealed and descaled. Usually used in industri...
2021-10-15 Steel World Comments Off on What is tungsten?
Tungsten is a silver-white metal with a melting point as high as 3400. C; Tungsten has high hardness, high density and good high temperature strength. Tungsten is mainly used in the production of ceme...
2021-10-15 Steel World Comments Off on Summary of Globe Valve Specifications
standard encdoing Standard Chinese name Standard English name DL/T531-1994 (reviewed in 2005) Technical conditions of high temperature and high pressure stop valve and gate valve for power station GB/...
2021-10-15 Steel World Comments Off on Talking about combined cooling and heating and water source heat pump in residential areas in northern China
1 Introduction According to statistics, as of the end of 2000, the country’s annual construction area was 36 billion square meters, of which 7.3 billion square meters in urban areas were mostly re...
