With the rapid development of our country’s economy and the continuous improvement of people’s living standards, people’s requirements for quality of life are also increasing day by ...
In order to improve the corrosion resistance of steel pipes, general steel parts pipes (black pipes) are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electric...
Ladle blowing with argon usually comes in two forms: (1) Bottom blown argon. Bottom-blown argon is mostly blown into the argon gas through a breathable brick installed at a certain position at the bot...
The main advantages of the arc cross wedge rolling mill are simple structure, lighting weight and low equipment cost. Compared with the roller cross wedge rolling mill, it only needs to drive one roll...
You can check it in the hardware manual. Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter and nominal diameter. The outer diameter of a seamless steel pi...
The die slot provided on the forging die for die forging to complete the initial blank making step (see forging step) is used to forge the blank into a pre-forged blank with a shape as close as possib...
Abstract: The folding defect of aluminum alloy die forgings is the most important defect among many defects and the main waste among die forging waste products. Conduct analysis and research on this p...
0Cr18Ni9 stainless steel plate is the most widely used stainless steel heat-resistant steel and is used in food equipment, general chemical equipment, and atomic energy industrial equipment. Generally...
Cr18ni9 stainless steel has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It has good hot workability such as stamping and bending, no heat treatment ...
Sheet stamping A metal plastic processing method in which metal sheets and strips are stamped into various parts on the mold of a press. Generally, the sheet metal thickness of blanking parts is less ...
Generally, their specifications are written as (Thickness*Width*C, C means length. Since it is usually rolled up, it is expressed by C. If it is a rectangular steel, it will have a length). For exampl...
standard encdoing Standard Chinese name Standard English name GB/T13852-1992 Marine hydraulic control valve technical conditions General specification of hydraulic control valves for ship GB/T17490-19...
A rolling method in which the rolled pieces alternately travel back and forth between different pass types in the same stand or on different stands in the same row. This rolling method is widely used ...
Why are bearings damaged? Bearings are precision parts, so they require considerable caution when using them. Even if high-performance bearings are used, if used improperly, the expected performance r...
1 Scope This process standard is applicable to indoor and outdoor heating and sanitary equipment pipeline installation projects in civil and general industrial buildings. 2 Construction preparation ...
1. Carbon structural steel ① consists of Q + number + quality grade symbol + deoxidation method symbol. Its steel number is prefixed with “Q”, which represents the yield point of the steel...
1. Low carbon ferrochromium is used to produce medium and low carbon structural steel, chromium steel, and alloy structural steel. Chromium steel is often used to make gears, gear shafts, etc. Chromiu...
For billet continuous casting machines, due to the small cross-section of the billet and the short metallurgical length, generally no more than 10m, the bulging deformation of the billet is not the ma...
Low alloy steel is made by adding a certain amount of alloying elements to carbon steel. The mass fraction of the alloying elements generally does not exceed 5% to improve the strength of the steel an...
Countermeasures to prevent decarbonization mainly include the following aspects: 1) When heating the workpiece, reduce the heating temperature and residence time at high temperature as much as possibl...
The closed porous groove two-high mill is the most common form of small rolling mill. In recent years, when designing this kind of rolling mill, the reduction device is often placed between the upper ...
When the rolled piece has just been bitten by the next rolling mill or has been rolled for a period of time. Suddenly, piles of steel appeared on the stand between the two rolling mills, and the heads...
1. Low alloy structural steel plate (GB3274-88) Low alloy structural steel plate is made of hot rolling low alloy structural steel. Low alloy steel plates are both killed steel and semi-killed steel p...
The rolling mill operating diagram represents and reflects the relationship between rolling passes and time. The random rolling time (T rolling), gap time (T interval), rolling rhythm (T) and rolling ...
The general diagram of the cold working production process is shown in Figure 1. Figure 1 General diagram of the cold working production process. Cold working includes cold rolling and cold drawing. B...
Electronic power-saving technology refers to the methods and methods that apply power electronics technology and microelectronics technology to significantly reduce the power consumption in the produc...
Electro-galvanizing is rolled by a cold tandem rolling unit and then annealed by a CAPL unit before entering the electro-galvanizing unit. After surface cleaning and electroplating, phosphating, passi...
Because solid solution strengthening is generally not used as the main strengthening method for microalloyed steel. The reasons are as follows: (1) Solid solution strengthening originates from lattice...
The main vibration parameters of the crystallizer are amplitude and frequency. The crystallizer vibration waveform, frequency and amplitude should be reasonably selected according to the cross-section...
In addition to considering the wear of the roll surface, the roll scrapping mainly depends on the size of the final working roll diameter. If the roll diameter is too small, it affects the strength of...
Passivation – Under certain conditions, when the potential of 3d printing metal moves in the positive direction due to an external anodic current or a local anodic current, the state of the orig...
1. Classification of steel plates (including steel strips): 1. Classification by thickness: (1) thin plate (2) medium plate (3) thick plate (4) extra thick plate 2. Classification according to product...
Industry Status In 2005, my country’s plastic pipe industry developed rapidly, and various economic and technical indicators improved significantly compared with the previous year. According to ...
Compressor is a machine used to increase gas pressure and transport gas. From an energy point of view, a compressor is a machine that converts the power energy of the prime mover into gas pressure ene...
During the continuous steel casting process, when the core of the cast slab is not completely solidified and liquid steel still exists, the continuous casting slab straightening technology is used to ...
The main precautions for trial rolling are: 1) In accordance with the main motor starting and quality management system and rolling mill operating technical operating procedures, notify relevant posit...