High-speed tool steel is mainly used to create high-efficiency cutting tools. Because of its red hard, wear resistance, high strength characteristics, but also for the manufacture of high performance molds, rolls, high temperature bearings and high temperature springs. High-speed tool steel after heat treatment using the hardness up to HRC63 above, at about 600 ℃ operating temperature can still maintain high hardness, and its toughness, wear resistance and heat resistance are better. Annealing state high-speed tool steel main alloying elements, molybdenum, chromium, vanadium, as well as some high-speed tool steel by adding cobalt, aluminum and other elements. This type of steel is a high-carbon, high-alloy, ledeburite, and one of its major organizational features is the presence of large amounts of carbides. As-cast high-speed tool steel carbide is eutectic carbide, processed by thermal stress and broken into particles distributed in the steel, called a carbide; from austenite and martensite matrix carbide precipitation For the second carbide. These carbides have a significant impact on the performance of high-speed tool steels, particularly secondary carbides, which have a significant impact on the austenitic grain size and secondary hardening properties of the steel. The amount and type of carbides are related to the chemical composition of the steel, while the particle size and distribution of carbides are related to the amount of deformation of the steel. Tungsten and molybdenum are the main alloying elements of high-speed tool steels and play an important role in the secondary hardening of steels and other properties. Chromium hardenability of steel, oxidation resistance and wear resistance play an important role in the secondary hardening also have a role. Vanadium plays an important role in the secondary hardening and wear resistance of steel, but reduces the grindability. High-speed tool steel quenching temperature is high, close to the melting point, the purpose is to make the alloy carbide more into the matrix, the steel has better secondary hardening ability. High-speed tool steel hardness after quenching, which is the first hardening, but the higher the quenching temperature, the lower the strength and toughness after tempering. After quenching at 350 ℃ below the low temperature tempering hardness decreased above 350 ℃ temperature tempering hardness gradually increased to 520 ~ 580 ℃ tempering (different chemical composition, tempering temperature) the second hardness peak, and more than Quenching hardness, this is secondary hardening. This is an important feature of high-speed tool steel. In addition to high-speed tool steel with high hardness, wear resistance, red hardness and other properties, but also has some thermoplastic, grindability and other process performance. Multi-line high-speed tool steel main alloying elements are tungsten, molybdenum-free or containing a small amount of molybdenum. Its main features are overheating sensitivity, decarburization sensitivity is small, heat treatment and thermal processing temperature range is wide, but coarse carbide particles, poor distribution uniformity, affect the toughness and ductility of steel. The main alloying elements of tungsten-molybdenum high-speed tool steel are tungsten and molybdenum. Its main characteristic is carbide particle size and distribution are better than tungsten high-speed tool steel, decarburization sensitivity and thermal sensitivity than molybdenum high-speed tool steel, the use of performance and process performance are better. Molybdenum-based high-speed tool steel is the main alloying elements of molybdenum, tungsten-free or containing a small amount of tungsten. Its main features are fine carbide particles, uniform distribution, good toughness, but decarburization sensitivity and overheating sensitivity, thermal processing and heat treatment of a narrow range. Drilling high-speed tool steel is a common high-speed tool steel based on the addition of a certain amount of cobalt, can significantly improve the hardness, wear resistance and toughness. Powder is not high-speed tool steel is the method of metallurgy produced. Firstly, the low oxygen high-speed tool steel pre-alloyed powder is prepared by the atomization method, and then the powder is compacted into a fully dense billet by means of a cold and hot hydrostatic press and then forged and rolled into a material. Fine carbide powder is not high-speed tool steel, uniform distribution, toughness, grindability and dimensional stability are very good, can produce ingot France may have a higher content of alloying elements superhard high-speed tool steel. Powder high-speed tool steel can be divided into three categories, the first category is cobalt-containing high-speed tool steel, which is characterized by close to the hardness of cemented carbide, but also has good malleability, machinability, grindability and strength toughness. The second category is high cobalt-free tungsten, molybdenum, vanadium high-speed tool steel. The third category is super wear-resistant high-speed tool steel. Its hardness is not too high, but excellent wear resistance, mainly used for demanding wear-resistant and withstand the impact load of working conditions.
Barbed Wire is twisted by fully automated barbed wire machine.
Raw material: superior low carbon steel wire.
Surface treatment: Electric galvanized and hot-dipped galvanized. Plastic coated and spray with the color of blue, green, yellow etc.
Barbed wire is one kind separation protection net woven by various knitting technology, and the barbs of it was twined around core wire by barbed wire machine.
Three twist methods of barbed wire : regular twist, reverse twist, regular twist combine reverse twist
Uses: used for isolation and protection of grassland boundary, railway, highway etc.
Barbed Wire
Barbed Wire,Pvc Coated Barbed Wire,Razor Barbed Wire,Prevent Climbing Barbed Wire
Anping Weihao Hardware Wire Mesh Products Co., Ltd. ,