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Copyright: Qingdao the Fu Sheng Tai Metal Products Co., Ltd.
Contact:Sun Jie
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Common quenched and tempered steel all have?
A, chromium steel: on behalf of the steel grade and crsi. H is better than forty cr, strength and low temperature impact is higher, tempering stability is good, temper brittleness tendency larger. Often used in the manufacture of 30 - mm shaft, bolt and modulus small gear.
Second, the chrome molybdenum steel: on behalf of the steel grade and crmoa, 42 crmo, ML30CrMo, ML42CrMo. Water quench 30 to 55 mm, oil quenching 15 - mm; High room temperature mechanical properties and high temperature strength, good low temperature impact; No temper brittleness. Used in the manufacture of cross section larger parts, high load bolts, gears and 500 ℃ below the flange, bolts, 400 ℃ the following catheter, fasteners. 42 crmo h a 30 crmoa high, used in the manufacture of strength higher, section more parts.
Three, chromium manganese molybdenum steel: on behalf of the steel grade and crmnmo. Oil quenching diameter of 80 mm, has high comprehensive mechanical properties, tempering stability is good. Used in the manufacture of large cross section of the heavy duty gear and shaft parts.
Four, manganese molybdenum vanadium steel: on behalf of the steel grade and mn2mowa. Good hardenability: water quenching to 150 mm, the core organization for upper and lower bainite plus a small amount of martensite, Oil quenching 70 mm, the heart of more than 95% of the martensite, Good low-temperature impact toughness, low notch sensitivity and high fatigue strength. Used in the manufacture of 80 mm in the following important parts.
Five, chromium manganese silicon steel: on behalf of the steel grade and crmnsia. Water quench forty - mm, oil quenching 25 - mm. Strength, impact toughness is high, there is the temper brittleness. Used in the manufacture of high pressure fan blade, valve plate, clutch friction plate, shaft, gear, etc.
Six, nickel chromium steel: on behalf of the steel grade and crni crni and 45. Water quench reach forty mm, oil quenching 15-25 mm; Good mechanical properties, good low temperature impact toughness, temper brittleness tend to small. 30 crni3a h is higher, comprehensive mechanical performance is good, have white spot sensitivity and temper brittleness. Used in the manufacture of large cross section of the crankshaft, connecting rod, gear, shaft and bolt, etc.
Seven, chromium, nickel molybdenum steel: on behalf of the steel grade and crnimoa. Has good mechanical properties, low temperature impact toughness, high notch sensitivity low and no temper brittleness. Used in the manufacture of large crankshaft, connecting rod, shaft, gear, bolts and other mechanical parts of large, complicated shape.
Eight, nickel chromium molybdenum vanadium steel: on behalf of the type of steel 45 crnimova