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Cr Steel

Posted on 2015-01-09
(1) The characteristics of low-carbon tool steel alloy tool steel, low hardenability steel. The steel has high hardness, high toughness, good line cutting performance. This kind of steel is characterized by containing less alloying elements, tempering resistance is low, the hardened layer shallow, and thus lower their carrying capacity. Welding preheat preceded heating after welding control should slow cooling.
(2) Availability annealed condition and soften the hardness, hardness 200HBS.
(3) The chemical composition (mass fraction,%) C O.95 ~ 1.10, Mn≤0.40, Si≤0.35, P≤0.03, S≤O.03, Cr O.75 ~ 1.05.
(4) Refer to the corresponding steel German DIN standard steel 125Crl, our standard steel Cr.
(5) Critical point temperature (approx.) A = 750 ℃, M = 205 ℃.
(6) Specification thermal processing temperature 1000 ~ 800 ℃.
(7) The softening temperature annealing specification 700 ~ 720 ℃, furnace cooling.
(8) Specification annealing temperature 770 ~ 790 ℃, holding time 2 ~ 4h, to ≤30 ℃ / h cooling rate, slow cooling in the furnace to a temperature of 500 ~ 600 ℃. Cooled baked.
(9) Isothermal ball annealing specification
① (790 ~ 820) ℃ × (2-3) h, furnace cooling to (700 ~ 720) ℃ × (3-4) h. Cooled baked, hardness ≤229HBS, pearlite 2 to 5, mesh carbide grade ≤2.
② (770 ~ 790) ℃ × (2 ~ 4) h. Furnace cooling to (680 ~ 700) ℃ × (4 ~ 6) h, furnace cooling to a temperature of 500 ~ 600 ℃, cooled baked, the hardness of 179 ~ 229HBS.
(10) ordinary quenching, tempering standard quenching temperature 830-860 ℃, oil cooling, hardness 62 ~ 64HRC, tempering temperature of 150 ~ 170 ℃, hardness 61 ~ 63HRC.
(11) Typical application examples
① Blanking dies, molds made of cold, cold die, red top.
② Saw blades and special tools.
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6.MOQ:500KG-1000KG
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