Straw pellet machine mold material alloy steel
Straw pellet machine mold material alloy steel
Classification of alloy steel
Alloy steel is divided into a high-quality alloy steel and special quality alloy steel. Need of special quality alloy steel production process quality control and performance; special quality alloy steel production process, strict quality control and performance.
General engineering structural alloy steel
General engineering structural alloy steel is a high-quality alloy steel commonly known as a structural steel. For manufacturing a mechanical structure, and use mostly after heat treatment. Due to the alloying elements, increasing hardenability resistance (Mn, Mo, Cr), the refinement of the grains (V, Ti ...) improve hardening stability. Low-carbon alloy structural steel after carburizing, nitrogen quenching and tempering treatment, the surface of the member wearable heart toughness, also called hardening steel; medium carbon alloy structural steel after quenching and tempering, to get a good overall performance called regulator and tempered steel.
All structural steel grades with symbols and figures of two Arabic numerals and alloying elements numerals million fraction of the average carbon content of the average alloy content of less than 1.5%, steel only marked element symbols, do not indicate the content, the content is more than 1.5%, with the number indicated.
High quality alloy steel in addition to a structural steel including alloy reinforced steel, the geological oil drilling alloy steel alloy steel, electrical silicon steel, railway.
The spring steel is used and HEALTH 20 producing various leaf springs and helical springs or the like parts (such as rollers, etc.). Spring is able to produce large amounts of elastic deformation of the structural parts, by the elastic deformation of the spring, can absorb the impact energy, and to ease the shock and vibration, and therefore the requirements of the spring steel must have a high strength, particularly high yield strength and fatigue strength; want is not easy to decarburization, good surface quality, a certain hardenability and good process performance. Some spring also requiring heat, corrosion, etc.. High carbon spring steel, alloy and non-alloy steel spring,
65,70,75,80 carbon spring steel such as hardenability, poor performance, and more for the spring with a diameter or thickness less than 12 mm; 65Mn hardenability better performance, can be used for manufacturing the cross-sectional dimension of 15 to 20 mm of the spring, The wide range of applications. Larger size, the the spring manufacture of hot rolled molding method mostly used 55Si2Mn, 60Si2Mn, such as railway carriages, cars, tractor leaf springs and coil springs, etc.; large cross-section, heavy duty springs are usually 50CrVa 60Si2CrVa 50CrMn 65Si2MnWa, etc. manufacturing.
The Rolling Steel also called bearing steel. Mainly used to manufacture the rolling bearing inner and outer rings, balls, rolling grain cage, but also widely used in measuring tools, cold mold, low-alloy tool, diesel engine high pressure fuel pump parts. More more high-carbon chromium bearing steel Type, carburization, stainless steel, high-temperature, non-magnetic bearing steel. Carburizing bearing steel grades with "G" for Pinyin prefix, after the numbers indicate the percentage of carbon. Cr elements numerals after the name of the chromium content percentage. Behind the element symbols and their nominal content expressed as a percentage.
The prime symbol of the chromium content percentage of high-carbon chromium stainless steel with digital (carbon nominal thousand points) and containing other elements symbol grade and chemical composition shown in Table
Alloy tool steel
Low vulnerability to overcome carbon tool steel hardenability, improved abrasion resistance, Si, Mn, Cr, W, Mo, V, etc. is added to maintain a high carbon content, steel, alloy tool steel quenching permeability, widely used in the performance of carbon steel workers have the tools to meet the requirements. The alloy tool steel grades, is composed by the number of the chemical element symbols, when the carbon content in steel is less than 1.00%, grade digital representation before the carbon content of the nominal content of micrometer grades prepro figures indicated that the carbon content of not less than 1.00 % element symbols numerals after the gold-bearing elements of the nominal percentage content of less than 1.5% marked
Alloy tool steel use is divided into measuring and cutting tools steel, resistant to the impact of tool steel, cold iron mold steel, hot work die steel, magnetic die steel and plastic mold steel.
Gages the CUTLERY steel is carbon 0.08-1.45%, by adding alloying elements such as Cr, Mn, Si, W. Cr, Si, Mn improve the steel hardenability; same time, Cr, Si, but also improve the tempering stability; Mn also reducing quenching distortion; W to improve the wear and refine the organization. Type of steel is mainly used in the manufacture of turning tools, planer, reamer, broach cutting tools and gauges, templates, micrometer, plug gauge measuring tool. Impact-resistant tool steel 4Cr2Si, 5CrW2Si, 6CrW2Si, the case of the Department of tungsten, carbon in steel. To red plus toughness by reducing the carbon content, the tungsten to improve steel wear resistance, the impact load of tools used in the manufacture of cold mold, upsetting die, wind chisel.
Mold steel used in the manufacture of the mold, including cold work die steel, hot work die steel, hot die steel, non-magnetic die steel and plastic mold steel.
High-speed tool steel
In order to meet the cutting process, the tool line speed of 80 m / min, the blade temperatures up to 60oC, tool hardness HRC> 60 requirements, in the high carbon steel adding a large W, Mo, Cr, V and other alloying elements and to obtain high-speed steel, W can increase the hot hardness of the steel, and Mn in the tempering temperature 500oC-600oC, W, Mo to deposited and generate Mo2C and W2C, secondary hardening occurs (Temperature at 500oC-600oC when the hardness of the steel is not only not decreased but increased phenomenon leaves secondary hardening). High-speed tool steel W18Cr4V, is the world's first production, most commonly Engineering steel used to manufacture a variety of tool, such as turning, shaper cutters, reamers, drill. But because the carbide segregation serious, thermoplastic low, limiting further use. CW6MoCr4V2 based W of Mo Mo-generation high-speed steel, carbide distribution uniform, thermoplastic, cheap (our the high molybdenum reserves and production), just slightly lower hot hardness, high-speed steel steel.