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1、轴的常用材料及其机械性能轴的常用材料及其机械性能(MPa)许用弯曲应力 材料牌号热处理毛坯直径(mm)硬度 HB抗拉强度b屈服强度s弯曲疲劳极限-1扭转疲劳极限-1+10-1备 注Q235-A-4402401801051257040用于不重要或载荷不大的轴正火25156420250180100125704020正火回火100 100300300500500700103156400380370360220200190180165155150145959085801257040用于载荷不大,要求韧性较高的场合。正火25875403202301301657545正火回火100 10030030050
2、05007507501000149187143187137187520500480460440270260240230220210205190185175120115110105100165754535调质100 1003001562075605403002802302201301251758550用于有一定强度要求和加工塑性要求的轴。正火252416103602601501959555正火回火100 100300300500500750170217162217156217600580560540300290280270240235225215140135130125195955545调质20
3、021725565036027015521510060应用最广泛。2510008004852802451207040Cr调质100 10030030050050080024128622926921725575070065060055050045035035032029525520018517014524512070用于载荷较大,而无很大冲击的重要轴。259007504452552451207035SiMn42SiMn调质100 100300300400400500229286217269217255196255800750700650520450400380355320295275205185
4、17016024512070性能接近 40Cr,用于中小型轴。2510008004852802451207040MnB调质 20024128675050033519524512070性能同 40Cr,用于重要的轴。40CrNi调质25100080048528028513075用于很重要的轴251008505002852451207035CrMo调质100 10030030050020726975070065055050045035032029520018517024512070性能接近40CrNi,用于重载荷的轴。50080060040027015538SiMnMo调质100 10030030
5、050050080022928621726919624118724175070065060060055050040036033531027021019517515527512070性能接近于35CrMo。2510008504952852751207037SiMn2MoV调质200 20040040060026930224128624126988083078070065060042539537024523021527512070用于高强度、大尺寸和重载荷的轴。38CrMoAlA调质30229100085049528527512575用于要求耐磨、高强且热处理变形很小的(氮化)轴20Cr渗碳淬火回
6、火1560表面 HRC56628506505504003752802151602151006020CrMnTi渗碳淬火回火15表面 HRC56621100850525300365165100用于要求强度、韧性均较高的轴(如齿轮轴、蜗杆)1Cr13调质60187217600420275155275130752Cr13调质10019724866045029517027513075用于腐蚀条件下工作的轴。1Cr18Ni9Ti淬火60 601801002001925505405002202002002051951851201151051657545用于在高、低温及强腐蚀条件下工作的轴。QT400-15-156197400300145125100QT450-10-170207450330160140110QT500-7-187255500380180155125QT600-3-197269600420215185150用于结构、形状复杂的轴注:1. 表中所列疲劳极限数据,均按下式计算 -10.27(b+s),-10.156(b+s)。2. 其他性能,一般可取 s(0.550.62)s,01.4-1,01.5-1。3. 球墨铸铁 -10.36b,-10.31b。4. 许用静应力+1=b/Sb,许用疲劳应力-1-1/S-1。5. 选用-1时,重要零件取小值,一般零件取大值。