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弹簧许用应力(摘自GB/T 1239.6-1992)
表10-2-6
注:1. τs──试验切应力,σs──试验弯曲应力,σb──材料抗拉强度。
2. 本表的单位是MPa。
钢丝类型或材料 |
油淬火 回火钢丝 |
碳素钢丝 琴钢丝 |
不锈钢丝 | 青铜线 | 65Mn |
55Si2Mn 55Si2MnB 60Si2Mn 60Si2MnA 50CrVA |
55CrMn 60CrMn |
|
---|---|---|---|---|---|---|---|---|
压缩弹簧 许用切应力 τp |
Ⅲ类(τs) | 0.55σb | 0.5σb | 0.45σb | 0.4σb | 570 | 740 | 710 |
Ⅱ类 | (0.40~0.47)σb | (0.38~0.45)σb | (0.34~0.38)σb | (0.30~0.35)σb | 455 | 590 | 570 | |
Ⅰ类 | (0.35~0.40)σb | (0.30~0.38)σb | (0.28~0.34)σb | (0.25~0.30)σb | 340 | 445 | 430 | |
拉伸弹簧 许用切应力 τp |
Ⅲ类(τs) | 0.44σb | 0.40σb | 0.36σb | 0.32σb | 380 | 495 | 475 |
Ⅱ类 | (0.32~0.38)σb | (0.30~0.36)σb | (0.27~0.30)σb | (0.24~0.28)σb | 325 | 420 | 405 | |
Ⅰ类 | (0.28~0.32)σb | (0.24~0.30)σb | (0.22~0.27)σb | (0.20~0.24)σb | 285 | 370 | 360 | |
扭转弹簧 许用弯曲应力 σBp |
Ⅲ类(σs) | 0.80σb | 0.80σb | 0.75σb | 0.75σb | 710 | 925 | 890 |
Ⅱ类 | (0.60~0.68)σb | (0.60~0.68)σb | (0.55~0.65)σb | (0.55~0.65)σb | 570 | 740 | 710 | |
Ⅰ类 | (0.50~0.60)σb | (0.50~0.60)σb | (0.45一0.55)σb | (0.45~0.55)σb | 455 | 590 | 570 |