鋼鐵材料的許用應(yīng)力

材材料性能拉壓彎曲扭轉(zhuǎn)剪切料類材料標(biāo)號(hào)截面尺寸/mm熱處理抗拉強(qiáng)度。b屈服強(qiáng)度。sIIIIIIIIIIIIIIIIIIII型/MPaaiaiaiaaaTnTnTnTTT普Q215熱扎ab335?410as185?215145125901751401059590601009060通碳Q235100ab375?460as205?235160140100190160120105956511010070鋼Q275ab490?610as235?275175150110210170130115105701201108020正ab410as2451751451052101651251151057012010575ab450as275優(yōu)25火195160115230175135125115751351208035<100ab530as3152101801252502001501351208014512085質(zhì)調(diào)質(zhì)ab550?750as320?3702101851302502051551351258514512085碳45正火ab600as3552302001452702201701501359016014095調(diào)質(zhì)ab630?800as370?430250215150300235180160150100175150100鋼50<25正火ab630as375250215150300235180160150100175150100<100調(diào)質(zhì)ab>700as>400265235165310260195170155105180160110

材料標(biāo)號(hào)截面尺寸/mm熱處理材料性能拉壓彎曲扭轉(zhuǎn)剪切抗拉強(qiáng)度。b屈服強(qiáng)度。s/MPaIIIIIIIIIIIIIIIIIIIIaiaiaiaaaTnTnTnTTTZG200?400100正火及回火ab400as20013512090160135105908060958560ZG230?450ab450as23015514010018515512010085651109065ZG270?500ab500as2701751601152101751351151007512010575ZG310?570ab570as3101901701252301901451251058013011080ZG340?640ab640as3402001801302402051551301158714012087

材料標(biāo)號(hào)壁厚/mm抗壓強(qiáng)度/MPa抗拉強(qiáng)度/MPa中心抗壓彎曲扭剪壓拉拉壓IIIIIIIIIIIIIIIIIII。i。i。i。i。iTTTTTTHT-150>2.5?10500?70017514080502820503023452418>10?2014514080412417412519372015>20?3013014080372115372217331813>30?5012014080341914342115311712HT-200>2.5?10600?800220170100633625633828573123>10?20195170100563222563325502720>20?30170170100492819492922442417>30?50160170100462618462721412216HT-250>4.0?10800?1000270230130774431774635693728>10?20240230130693927694131623325>20?30220230130633625633828573123>30?50200230130573223573426512821HT-300>10?201000?1200290285160834733835037754030>20?30250285160714129714332643526>30?50230285160663726663930593224HT-350>10?201100?1300340315180975539975844874735>20?30290315180834733835037754030>30?50260315180744230744433673627

載 荷軟鋼中硬鋼鑄 鋼鋼 鐵I900?15001200?1800600?1200300拉伸II600?1000800?1200400?600200I300?500400?600200?400100I900?15001200?1800900?1500900壓縮II600?1000800?1200600?1000600I900?15001200?1800750?1200彎曲II600?1000800?1200500?800I300?500400?600250?400I720?1200960?1440480?960300剪切II480?800640?960320?640200I240?400320?480160?320100I600?1200900?1440480?960扭轉(zhuǎn)II400?800640?960320?640I200?400320?480160?320附表鋼鐵的許用應(yīng)力（kgf/cm2）（注）載荷指I：靜載荷II：重復(fù)載荷III：交變載荷

材料極限強(qiáng)度。kgf/cm2許用應(yīng)力[O] kgf/cm2穩(wěn)定載荷沖擊或脈動(dòng)載荷反復(fù)父變載荷4000130070040050001700750450碳素鋼60002000950550700023001100650q全800027001300750口 金鋼100003300160090040001000500300鑄鋼50001200700400鋼號(hào)處理毛坯直徑(mm)機(jī)械性能硬度HB許用彎曲應(yīng)力[o]wkgf/cm2。bkgf/mm2oskgf/mm2°-1kgf/mm2正火25543226<1871100正火<100522725143?1871050正火>100?300502624143?187100035正火+回火>300?500482423137?187960>500?750462322131?187920調(diào)質(zhì)<100563026.5163?2011100>100?300542825.5144?2011080正火25613628<2411150正火<100603027.5170?207115045正火>100?300582927163?2071130正火+回火>300?500562826156?2071080>500?700542725149?2071050調(diào)質(zhì)<200653630187?229125025907546160035SiMn<100805240229?2861400調(diào)質(zhì)>100?300754535217?269140042SiMn>300?400704032.5217?2551350>400?500653831.5197?255130040MB調(diào)質(zhì)2510080501750<200755036240?2901450<100756038228?286150038SiMo調(diào)質(zhì)>100?300725536217?2691450>300?500705035197?2411400>500?800604030186?24112502510080501750<100755237241?286150040Cr調(diào)質(zhì)>100?300705035241?2861480/inQ1m?*n1ann表5軸的常用材料及許用彎曲應(yīng)力[30]變形名 稱變形允許值撓度V一般用途的軸需要提高剛度的轉(zhuǎn)軸安裝齒輪的軸安裝蝸輪的軸[V]=(0.0003?0.0005)1[V]=0.0002l[V]=(0.01?0.05)mn[V]=(0.01?0.05)m：轉(zhuǎn)角0滑動(dòng)軸承向心球軸承向心球面軸承圓柱滾子軸承圓錐滾子軸承安裝齒輪的軸承[0]=0.001rad[0]=0.005rad[0]=0.005rad[0]=0.0025rad[0]=0.0016rad[0]=0.001rad注：I 軸承之間的長(zhǎng)度(mm)；mn 齒輪法面模數(shù)(mm)；Mt蝸輪的端面模數(shù)(mm)。表7軸彎曲的允許變形量[30]名 稱撓度允許值[f