w6mo5cr4v3 - Spring steel - Shanghai Zhilian steel trade

Standard (GB / T 9943-1988) ω /% economic high-speed tool steel, tungsten-molybdenum system in general-purpose high-speed steel W6Mo5Cr4V2 will be the basis of vanadium content to 2.25% - 2.75% made of high carbon high-vanadium high-speed steel. The steel has the economic, small uniform carbide, high toughness, thermoplastic, good wear resistance than W6Mo5Cr4V2 steel, but can grind the poor, easy to decarburization. Manufacture of cutting tools can be difficult to cut materials. To further enhance the red hardness and wear resistance of steel to form the high-carbon, high vanadium high speed steel, usually about 3% of V-containing steel. And with V volume of 4% -5%, the shape of a simple and appropriate to create a small amount of cutting or grinding. Poor due to grinding of the steel, suitable for the production of complex tools. For the production of various types of general tools, such as broaches, molding cutter, cutter, drill, tap, turning, planing, etc. Still allows the production of more complex tools. Suitable for processing high-strength steel, high temperature alloys and other difficult materials.
Chemical composition:
Carbon C: 1.00 ~ 1.10 (promise deviation: ± 0.01)
Si Si: 0.20 ~ 0.45 (promise deviation: ± 0.05)
Manganese Mn: 0.15 ~ 0.40 (promise deviation: 0.04)
Sulfur S: ≤ 0.030 P P: ≤ 0.030
Chromium Cr: 3.75 ~ 4.50 (promise deviation: ± 0.05)
Ni: to promise the residual content of ≤ 0.30
Copper Cu: agreed to the residual content of ≤ 0.25
Vanadium V: 2.25 ~ 2.75 (promise deviation: ± 0.05)
Mo Mo: 4.75 ~ 6.50 (promise deviation: size ≤ 6, ± 0.05; size> 6, ± 0.10)
Tungsten W: 5.00 ~ 6.75 (promise bias: dimensions ≤ 10, ± 0.10; size> 10, ± 0.20)
Mechanical properties:
Hardness: the hardness of delivery: (other processing methods) ≤ 269HB;
(Annealing) ≤ 255HB. Quenching and tempering heat treatment system and the sample hardness: ≥ 64HRC
Heat Treatment:
Standard heat treatment: quenching, 730 ~ 840 ℃ preheating, 1190 ~ 1210 ℃ (salt bath) or 1200 ~ 1220 ℃ (box-type furnace) heating, oil cooling, 540 ~ 560 ℃ tempering two times, each time 2h. [3]
Delivery status:
Hot rolling, forging, annealing cold-drawn steel bar to the state of delivery, hot-rolled, forged steel bar to annealing + other processing methods (peeling, light pull, grinding or polishing, etc.) after the delivery process