鋼鐵材料的許用應(yīng)力

材料類型材料標(biāo)號截面尺寸/mm熱處理材料性能拉 壓彎 曲扭 轉(zhuǎn)剪 切抗拉強(qiáng)度O、 b屈服強(qiáng)度os/MPa1IIIII1IIIII1IIIII1IIIIIOlOlOlOOOTnTnTnTTT普通碳鋼Q215100熱扎o335?410bOs185?215145125901751401059590601009060Q235O375?460bOs205?235160140100190160120105956511010070Q275O490?610bOs235?2751751501102101701301151057012011080優(yōu)質(zhì)碳鋼20<100正火O410bOs245175145105210165125115105701201057525O450bOs275195160115230175135125115751351208035O530bOs3152101801252502001501351208014512085調(diào)質(zhì)O550?750bOs320?370210185130250205155135125851451208545正火O600bOs3552302001452702201701501359016014095調(diào)質(zhì)O630?800bOs370?43025021515030023518016015010017515010050<25正火O630bOs375250215150300235180160150100175150100<100調(diào)質(zhì)O>700bOs>400265235165310260195170155105180160110材料標(biāo)號截面尺寸/mm熱處理材料性能拉 壓彎 曲扭 轉(zhuǎn)剪 切抗拉強(qiáng)度o、 b屈服強(qiáng)度os/MPa1IIIII1IIIII1IIIII1IIIIIolololoooTnTnTnTTTZG200?400100正火及回火o400bos20013512090160135105908060958560ZG230?450o450bos23015514010018515512010085651109065ZG270?500o^500os2701751601152101751351151007512010575ZG310?570ob570os3101901701252301901451251058013011080ZG340?640o^640os3402001801302402051551301158714012087

材料標(biāo)號壁厚/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1II1IIIII1IIIII1IIIIIOlOlOlololTTTTTTHT-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附表鋼鐵的許用應(yīng)力（kgf/cm2）載荷軟鋼中硬鋼鑄鋼鋼 鐵1900?15001200?1800600?1200300拉伸11600?1000800?1200400?丿600200II300?500400?600200?丿4001001900?15001200?1800900?1500900壓縮II600?1000800?1200600?10006001900?15001200?1800750?1200彎曲11600?1000800?1200500?800II300?500400?600250?4001720?1200960-?1440480?T60300_、r?剪切11480?800640-?960320?640200II240?400320-?480160?丿320100

扭 轉(zhuǎn)III600?1200400?800200?400900?1440640?960320?480480?960320?640160?320（注）載荷指I:靜載荷II:重復(fù)載荷川：交變載荷表4許用彎曲應(yīng)力9]3材 料極限強(qiáng)度O許用應(yīng)力[o] kgf/cm2材 料kgf/cm2穩(wěn)定載荷沖擊或脈動(dòng)載荷反復(fù)父變載荷40001300700400碳素鋼50001700750450碳素鋼60002000950550700023001100650厶仝痢800027001300750合 金 鋼1000033001600900生基 圭17140001000500300鑄 鋼50001200700400表5軸的常用材料及許用彎曲應(yīng)力[30]鋼號處理毛壞直徑(mm)機(jī)械性能硬度HB許用彎曲應(yīng)力[a]wkgf/cm2Obkgf/mm2askgf/mm2a—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/inQ1"0?OGO1Qnn表6 軸類零件允許變形的參考數(shù)值變形名 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]=0.0002i[v]=(0.01?0.05)m“[v]=(0.01?0.05)m"t角轉(zhuǎn)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 軸承之間的長度(mm)； 齒輪法面模數(shù)(mm)；M 蝸輪的端面模數(shù)(mm)。t表7軸彎曲的允許變形量[3