Galvanized steel pipes are divided into cold-dip galvanized pipes and hot-dip galvanized pipes. Cold-dip galvanized pipe is electro-galvanized. The amount of galvanizing is very small, only 10-50g/m2....
The system consists of cooling device system, cooling water system and microcomputer detection and control system. The cooling device system consists of a water cooling device, a pinch roller and a tr...
Cold shearing is used to cut steel after cooling, so the force is greater. The connection requirements between the shear body and the shear blade are relatively high and must be able to withstand larg...
According to the test, 316L stainless steel has excellent corrosion resistance, especially pitting resistance, due to the addition of Mo; it also has good high-temperature strength; it has excellent w...
The rolling pressure is the force exerted by the metal on the roll perpendicular to the horizontal projection of the contact area when the rolled piece is deformed, as shown in Figure 1. It is an impo...
Splashing is a phenomenon often seen in the top-blown converter blowing process. The hazards of splashing are as follows: (1) Metal loss caused by splashing is 0.5% to 5%. Avoiding splashing is equiva...
Deformation force refers to the force exerted by moving tools on deformed materials during metal etching aluminum. Such as the hammer head pressure P during upsetting (see figure), the roll pressure d...
Slow wind blowing is a blast furnace operation method that reduces blast furnace productivity and pressure in the furnace, allowing the blast furnace to operate in a reduced wind state. Situations tha...
The specifications of channel steel are expressed in millimeters of waist height (h) * leg width (b) * waist thickness (d). For example, 120*53*5 means that the waist height is 120 mm and the leg widt...
There are currently four force methods for split rolling: (1) Roll cutting method: The rolling in the laser cutting copper pass is used to deform the rolled piece and achieve cutting at the same time....
, The concept of steel: Steel is a steel ingot, billet or steel material that is made into various shapes, sizes and properties that we need through pressure processing. Steel is an indispensable mate...
The so-called end-bottom structure refers to the structural arrangement between the water pocket at the bottom of the nozzle and the end wall. This involves the shape of the water pocket, the central ...
1. Development trend of common slab descaling at home and abroad In recent years, in order to meet the descaling requirements of thin slab short-process hot rolling (hereinafter referred to as CSP) pr...
1 Scope This process standard is applicable to electrical lighting concealed pipe wiring projects in general civil buildings, and shall not be laid in high-temperature places, places susceptible to me...
It can be divided into the following four types: (1) Alkaline cyanide plating bath. (2) Alkaline sulfate plating bath. (3) Acidic boron fluoride salt plating bath. (4) Neutral sulfate plating bath. Th...
Medieval smelting method for mass production of wrought iron. Also known as the mixing method. The structure of the Pudelin furnace is similar to that of a plain furnace, except that there is no lower...
Over the past 25 years, microalloyed steels (MA) have dominated the field of high-quality steels. Developments in recent years have shown that microalloyed steel is the best choice when high performan...
General Setting Regulations 1.1 Overview These regulations apply to the chemical process system major. The valves mentioned do not include safety valves, steam traps, sampling valves and pressure redu...
Asymmetrical descent of burden is a manifestation of abnormal furnace conditions during the blast furnace ironmaking process. At this time, the unloading speeds on both sides of the blast furnace are ...
Compared with traditional continuous casting, high-efficiency continuous casting is characterized by high casting speed, high quality, high efficiency, high operating rate, and high temperature castin...
Thinning spinning, also known as powerful spinning, is developed on the basis of ordinary spinning. Its deformation characteristics are: the mandrel drives the blank to rotate, and the rotating wheel ...
The rolling characteristics of steel ingots on the blooming mill are that the rolled piece is rolled back and forth, the rollers rotate forward and reverse, and the roller speed changes continuously a...
Deformation diagram of rolling process: During the rolling process, the flow diagram of the metal in the deformation zone in the height direction, width direction and rolling direction. The flow of de...
The deformation characteristic of ordinary spinning is that the metallic cementation slab mainly shrinks or expands in diameter during deformation. The diameter shrinkage is reduced diameter spinning,...
Colored stainless steel plates are used more and more widely due to their uniqueness. Nowadays, many foreign countries and regions use a large number of colored stainless steel products for decoration...
(1) Steel, copper and copper alloy plated parts: Dissolve and peel off the cadmium coating with the solution 1. Dilute hydrochloric acid. 2. 100g/l ammonium nitrate. 3. Waste chromic acid solution. (2...
In the environment of high temperature (usually high pressure) hydrogen and ammonia, localized metal etching copper corrosion is caused by hydrogen entering the material. The mechanism is that carbon ...
During the pouring process, the nozzle of the intermediate tank or the submerged nozzle may become clogged due to nodulation, with mild cases requiring oxygen burning and severe cases causing interrup...
Because the high-line steel billet is a small billet with a small cross-section, generally 120mm×120mm~150mm×150mm; the length of the billet is 9~16m. The main characteristics of its heating are: shor...
I. Introduction The hydraulic turbine is the prime mover of hydropower generation. The quality of the turbine runner blades has a huge impact on the safety, reliability, and economical operation of th...
(1) The metallographic structure is not ideal. The main reason is that the grains are coarse and uneven. Due to the appearance of a large amount of hypereutectoid structure, the free ferrite in hypoeu...
1. Foreword Our company’s new product 40,000 tons/year chloride equipment has been officially put into use. During the equipment selection period of the project, we conducted extensive research, adher...
Stainless steel is generally the general term for stainless steel and acid-resistant steel. 304 stainless steel toy conical compression spring refers to steel that is resistant to corrosion by weak me...
It is an indicator indicating the difficulty of material crushing or grinding in mineral processing. The initial concept is the unit work consumed when crushing materials of unlimited particle size to...
Extrusion is performed by heating the ingot to an appropriate temperature above the recrystallization temperature. During hot extrusion, the metal undergoes full recrystallization to eliminate interna...
Abstract: This article summarizes the experience in the operation and maintenance of lithium chemical refrigerators, and proposes a full-process management plan and matters that need to be paid attent...