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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>The characteristics of quenched and tempered steel Characteristics of quenched and tempered steel
1. Medium hardenability steel: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
The oil quenching of this type of steel is directly in the range of 40 to 60 n; m; common steel grades are chromium molybdenum steel, chromium manganese steel, etc. The common trademark is 35 (jrMn, 42CrMo, 35L: rMnV, 40CrMn, 35CrMnSi, 30CrMnsi, 35 (: rMnTi, 40crMnTi, 40crNi, etc.; chrome molybdenum steel has high hardenability; high temperature strength and arrangement stability; eliminate temper brittleness; 42CrMo is used to make quenched and tempered parts with high strength requirements and large cross sections; Turbine generator main shaft, connecting rod with large load; etc.; together with parts working at 5 (:) o °C for a long time, the hardenability and strength of chrome-manganese steel are higher; the resistance is not decreased; 30(: rMnsi is a high-strength steel; it has good weldability; it is used to make compact parts such as high-pressure blowers, high-speed load grinding wheel shafts and other important parts.
2. High hardenability steel:
The oil has a critical diameter of 60 to 100 mm. Common data trademarks are 30Mn2MoW, 40CrMnMo, 30(:rNi3, 37CrNi3, 40CrNiMc), 45CrNiMov, 25cr2Ni4w, etc.; 40crMnMo is a commonly used high-hardenability steel; it has the characteristics of small temper brittleness and small tendency to overheat; Large-area, high-strength and high-resistance parts; such as the semi-axle of large heavy-duty vehicles.
3. Low hardenability steel:
Usually used to make small and unimportant parts, chrome steel has good hardenability; it has higher tempering stability than carbon steel; it has wide quenching temperature, is not easy to overheat, and has a tendency to crack and crack. Talk about the value of 淖饔糜敫醺 å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ å—¨ 俳缋淙 俳缋淙 ​​岣 å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ å²£ çƒ çƒ çƒ çƒ çƒ çƒ çƒ çƒ çƒ çƒå’40Cr; oil quenching critical diameter is 20 ~ 30mm; often used as automotive axles, worms, spline shafts, etc.
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Characteristics of quenched and tempered steel
Source: China Bearing Network Time: 2013-10-02