1、表1普通碳鋼及優(yōu)質(zhì)碳鋼構(gòu)件基本許用應力/MPa材料類型材料截面尺寸/mm熱處 理材料性能拉 壓彎 曲扭 轉(zhuǎn)剪 切抗拉強度（7b屈服強度（7S/MPaInmInmInmInm(T l(T l(T l(TX nX nX nTTT普通碳鋼Q215100熱扎人335410d s185215145125901759590601009060Q235山375460d s205235160140100190160120105(T(T11010070Q275290 610d s23527517515011021017013011514010512011080優(yōu)質(zhì)碳鋼20< 100正火門410(rs2451

2、75145105210165125115105701201057525bb450(rs275195160115230175135125115751351208035門530(rs3152101801252502001501351208014512085調(diào)質(zhì)b b550 750b s320370210185130250205155135125851451208545正火門600(rs3552302001452702201701501359016014095調(diào)質(zhì)d b630 800d s37043025021515030023518016015010017515010050<25正火門630

3、(rs375250215150300235180160150100175150100< 100調(diào)質(zhì)(T b> 700(rs>400265235165310260195170155105180160110表2碳鋼鑄件基本許用應力/MPa材料標號截面尺寸/mm熱處理材料性能拉 壓彎 曲扭 轉(zhuǎn)剪 切抗拉強度（7b屈服強度（7S/MPaInmInmInmInm(T l(T l(T l(T(T(TX nX nX nTTTZG200- 400100正 火 及 回 火(Tb400g- S20013512090160135105908060958560ZG230- 450(Tb450kS?3

4、015514010018515512010085651109065ZG270- 500(rb500 s2701751601152101751351151007512010575ZG310- 570(Tb570s3W1901701252301901451251058013011080ZG340- 640(Tb640s3402001801302402051551301158714012087表3灰鑄鐵基本許用應力/MPa材料標號壁 厚/mm抗壓強度/MPa抗拉強度/MPa中心抗壓彎 曲扭 剪壓拉拉壓TRInmInmInm(T l(T lCT lCT lCT lTTTTTTHT-1501105007

5、0017514080502820503023452418>10 2014514080412417412519372015>20 3013014080372115372217331813>30 5012014080341914342115311712HT-200110600800220170100633625633828573123>10 20195170100563222563325502720>20 30170170100492819492922442417>30 50160170100462618462721412216HT-250>-108001

6、000270230130774431774635693728>10 20240230130693927694131623325>20 30220230130633625633828573123>30 50200230130573223573426512821HT-300> 102010001200290285160834733835037754030>20 30250285160714129714332643526>30 50230285160663726663930593224HT-350>10 201100130034031518097553997

7、5844874735>20 30290315180834733835037754030>30 50260315180744230744433673627附表鋼鐵的許用應力（kgf/cm2）載荷軟 鋼中硬鋼鑄鋼鋼鐵I9001500120018006001200300拉伸R6001000800 1200400600200TTT300500400 600200400100I9001500120018009001500900壓縮R6001000800 12006001000600I9001500120018007501200彎曲R6001000800 1200500800300500400

8、 600250400剪 切IRm72012004808002404009601440640960320480480960320640160320300200100扭 轉(zhuǎn)IRm60012004008002004009001440640960320480480960320640160320（注）載荷指 I:靜載荷n：重復載荷田：交父載荷表4許用彎曲應力材 料極限強度（7kgf/cm 2許用應力kgf/cm 2穩(wěn)定載荷沖擊或脈動載荷反復交父載荷鋼 素 碳400050006000700013001700200023007007509501100400450550650合金鋼80001000027003

9、30013001600750900鑄鋼4000500010001200500700300400鋼號處理毛坯直徑(mm)機械性能硬度HB許用彎曲應力(rw(T bkgf/mm2I0- skgf/mm2(T - 1kgf/mm2正火25543226< 1871100正火< 100522725143187105035正火>1003005026241431871000正火+回火>300500482423137187960>500 750462322131187920 7正火25613628<2411150正火< 1006030170207115045正火>

10、;1003005829271632071130正火+回火>300500562826156207108035SiMn25907546229286160042SiMn調(diào)質(zhì)< 1008052402172691400>100300754535217255140040MB調(diào)質(zhì)>3020-400玳405024029013582007550361450< 100756038228286150038SiMo調(diào)質(zhì)>1003007255362172691450、o八八cnn70oc4 7inn方 300 5007 05035251008050241286175040Cr調(diào)質(zhì)< 1007552372412861500>100300705035229、2601480表5軸的常用材料及許用彎曲應力30注：表中-1適用于子-0°I即光潔65提高或陷0,6311應相應提高或降低5105%表6軸類零件允許變形的參考數(shù)值義形名稱變形允許值撓度一般用途的軸 V =1V需要提高剛度的轉(zhuǎn)軸 V = L方些濟性的軸L-I I j 用 j 1m滑動軸承 0 =轉(zhuǎn)角向心球軸承 0 =9