Indawo yokuthengisa yepayipi yensimbi engu-40Cr ukuze icutshungulwe
Ipayipi lensimbi elingu-40Cr liwuhlobo lwensimbi eyindilinga enengxenye engenalutho futhi awekho amalunga azungezile. Yenziwe ngepayipi eliqinile elingenalutho ngokusebenzisa i-perforation, bese lenziwa ngokugoqa okushisayo, ukugoqa okubandayo noma umdwebo obandayo. Uma kuqhathaniswa nensimbi eyindilinga nezinye insimbi eqinile, lapho ukugoba namandla okugoqa kufana, isisindo sepayipi yensimbi silula, okuwuhlobo lwensimbi yesigaba somnotho.
Ngokusho kwe-GB / T 3077-2008: ukwakheka kwamakhemikhali (ingxenyana yobuningi,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0.30【 Izakhiwo zemishini]
Usayizi ongenalutho wesampula (mm): 25
Ukushisa kokushisa kokucisha kokuqala (℃): 850; Ukupholisa: Amafutha
Ukushisa kwesibili kokucisha ukushisa (℃):-
Izinga lokushisa elishisayo (℃): 520; Ukupholisa: amanzi, amafutha
Amandla okuqina (σ b/MPa): ≧980
Iphoyinti lokukhiya (σ s/MPa): ≧785
Ubude ngemva kokuphuka(δ 5/%): ≧9
Ukwehliswa kwendawo(ψ/%): ≧45
Amandla okumuncwa okunomthelela (aku2 / J): ≥ 47
Ubulukhuni be-Brinell (hbs100 / 3000) (i-annell noma izinga lokushisa eliphakeme lilinganiselwe): ≤ 207
Amamaki ensimbi ajwayelekile e-GB e-China yi-40Cr, impahla ye-DIN No. 1.17035/1.7045, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, 4 2 N42C4 American, SS 2, 4 N42Cr 4, SAS 4, 4 SS 4 N42Cr4, 41 Cr4, 4 SS 4, 2. / ASTM Standard Steel No. 5140, Japanese JIS steel standard No. scr440 (H) / scr440, American AISI / SAE / ASTM Standard Steel No. 5140, inhlangano yamazwe ngamazwe Standardization ISO standard steel No. 41Cr4.
(cishe) ACM = 780 ℃
Izinga lokushisa 850 ~ 870 ℃, ubulukhuni 179 ~ 229hbs.
Izinga lokushisa lingu-740 ~ 760 ℃, isikhathi sokubamba singu-4 ~ 6h, bese izinga lokushisa lipholile libe ngu-≤ 600 ℃ ngezinga lokupholisa lika-5 ~ 10 ℃ / h.
Ukuqina ngaphambi kokwelashwa ≤ 217hbs, ubulukhuni ngemva kokuthambisa ≤ 163hbs.
(670±10)℃ × 2H, izinga lokushisa liyakhuphuka ngesithando somlilo, (710 ± 10) ℃ × 2H, pholisa ngesithando somlilo, (670 ± 10) ℃ × 2H, ukunyuka kwezinga lokushisa nesithando somlilo, (710 ± 10) ℃ × 2H, bese wehlisa izinga lokushisa ngesithando somlilo, (670 ± 10) ℃ × 2H, izinga lokushisa likhuphuka ngesithando somlilo, (710 ± 10) ℃ × 2H, pholisa ngesithando somlilo imijikelezo emi-3, bese upholisa phansi ukuze 550 ℃ yokupholisa umoya. Ukuqina ngemva kokwelashwa kungu-153hbs.
Ukushisa kokucisha 850 ℃± 10 ℃, ukupholisa uwoyela; Izinga lokushisa elipholile lingu-520 ℃± 10 ℃, amanzi, uwoyela nomoya ukupholisa.
Insimbi ye-carbon modulated emaphakathi, insimbi enesihloko esibandayo. Insimbi inenani elimaphakathi nokucubungula kalula. Ngemuva kokwelashwa okufanele kokushisa, kungathola ukuqina okuthile, ipulasitiki nokumelana nokugqoka. Ukwenza okujwayelekile kungakhuthaza i-tissue spheroidization futhi kuthuthukise ukusebenza kokusika kwezikhala ngobulukhuni obungaphansi kuka-160hbs. Ifuthelwe ku-550 ~ 570 ℃, insimbi inezakhiwo ezingcono kakhulu zemishini. Ukuqina kwale nsimbi kungaphezu kwalokho kwensimbi engama-45. Ilungele ukwelashwa kokuqina kwendawo njengokucisha imvamisa ephezulu kanye nokucisha ilangabi.
Ngemva kokucisha nokushisa, le nsimbi isetshenziselwa ukwakha izingxenye zemishini ezithwala umthwalo ophakathi nendawo nesivinini esiphakathi, njenge- knuckle yokuqondisa, i-half shaft engemuva yemoto, igiya, i-shaft, i-worm, i-spline shaft, umkhono ophakathi nendawo, njll. ethuluzini lomshini; Ngemuva kokucisha kanye nokushisa okuphakathi kwezinga lokushisa, kusetshenziselwa ukwenza izingxenye ezithwele umthwalo omkhulu, umthelela kanye nesivinini esiphakathi, njengegiya, i-main shaft, i-oil pump rotor, i-sliding block, ikhola, njll; Ngemuva kokucisha kanye nokushisa okuphansi, kusetshenziselwa ukukhiqiza izingxenye ezinomthwalo osindayo, umthelela ophansi, ukumelana nokugqoka kanye nokuqina okuqinile okungaphansi kuka-25mm esigabeni, njenge-worm, shaft main, shaft, collar, njll; Ngemuva kokucisha nokushisa kanye nokucisha indawo ephezulu, isetshenziselwa ukwenza izingxenye ezinobunzima obuphezulu nokumelana nokugqoka ngaphandle komthelela omkhulu, njengegiya, umkhono, umgodi, i-shaft enkulu, i-crankshaft, i-spindle, iphini, induku yokuxhuma, isikulufu, I-nati, i-valve yokungena, njll. Ngaphezu kwalokho, le nsimbi ibuye ifanele ukukhiqiza izingxenye ezihlukahlukene zokudlulisela eziphathwa nge-carbonitriding, njengamagiya namashafu anobubanzi obukhulu kanye nokuqina okuhle kokushisa okuphansi.
I-Annealed, ubulukhuni ≤ 207hbs. I-40Cr elastic modulus: i-elastic modulus E (20 ℃) / MPA 200000 ~ 211700, i-shear modulus G (20 ℃) 80800
Inqubo yokucisha engu-40Cr
40Cr quenching, 850 ℃, ukupholisa uwoyela; I-Tempering 520 ℃, ukupholisa amanzi, ukupholisa uwoyela. Ubulukhuni bokucisha ubuso bepayipi lensimbi elingu-40Cr ngu-hrc52-60, futhi ukucisha ilangabi kungafinyelela ku-hrc48-55.
Ukwelashwa kwe-nitriding engu-40Cr
I-40Cr ingeyensimbi ye-nitrided, futhi izakhi zayo zihambisana ne-nitriding. I-40Cr ingathola ubulukhuni obuphezulu bobuso ngemva kokwelashwa kwe-nitriding, futhi ubulukhuni obuphakeme kakhulu ngemva kokwelashwa kwe-nitriding bungafinyelela ku-hra72 ~ 78, okungukuthi hrc43 ~ 55. Umzila wenqubo ye-nitriding workpiece: ukucisha imishini yokucisha i-annealing kanye nokuqeda ukushisa ukulungisa umshini wokukhipha ukucindezeleka ukugaya ukugaya noma ukuqeda ukugaya. ukugaya. Ngenxa yokuthi ungqimba lwe-nitrided luncane futhi lu-brittle, kuyadingeka ukuthi lube nesakhiwo esiyinhloko esinamandla aphezulu, ngakho-ke kuyadingeka ukwenza ukwelashwa kokushisa nokucisha kuqala ukuze uthole i-sorbite enomoya futhi uthuthukise izakhiwo zemishini zomongo kanye nekhwalithi ungqimba lwe-nitrided. I-Soft nitriding i-nitriding esebenzayo, futhi i-gas nitriding ivame ukusetshenziswa
40Cr welding
Ngaphambi kokushisela okungu-40Cr, naka ukushisa kwangaphambi kwesikhathi ukuvimbela ukuqhekeka okungaphakathi kwe-weld ngenxa yokushisa kwe-matrix. Kungcono ukujwayela ngaphambi kokushisela.
I-Weldability ye-40Cr: kulula ukuhlukanisa ngesikhathi sokucwebezela futhi kuyazwela ku-crystallization crack (uhlobo lokufa okushisayo). Kulula ukuqhekeka ku-crater kanye nengxenye ye-concave ku-weld ngesikhathi sokushisela. Ngokuqukethwe kwekhabhoni ephezulu, kulula ukuthola isakhiwo esiqinile (i-martensite) esizwela kakhulu emifantwini ebandayo ngesikhathi sokupholisa ngokushesha. Uma izinga lokupholisa lendawo eshisa kakhulu lilikhulu, kulula ukwakha i-carbon martensite eqinile futhi ephukayo futhi ihlanganise indawo eshisa kakhulu.
1. Ukushisela ngokuvamile kwenziwa esimweni esine-annealed (esijwayelekile).
2. Indlela ye-welding ayinqunyelwe
3.Izinga lokushisa langaphambi kokushisa linganyuswa ngokufanelekile ngamandla amakhulu omugqa. Ngokuvamile, izinga lokushisa langaphambi kokushisa nokushisa kwe-interlayer lingalawulwa phakathi kuka-250 ~ 300 ℃.
4. Impahla yokushisela izoqinisekisa ukuthi ukwakheka kwensimbi ediphozithi kuyafana nalokho kwesisekelo sensimbi, njenge-j107-cr.
5.Ukucisha nokushisa ukwelashwa kokushisa kuzokwenziwa ngesikhathi ngemuva kokushisela. Uma kunzima ukwenza ukwelashwa kokucisha kanye nokushisa ngesikhathi, ukuthungatha okuphakathi noma ukubamba izinga lokushisa elingaphezu kokushisa ngaphambi kwesikhathi kungenziwa ukuze kuqedwe i-hydrogen ehlakazekile futhi kuthambise isakhiwo. Ngemikhiqizo enesakhiwo esiyinkimbinkimbi kanye nama-welds amaningi, ukuthungatha okuphakathi kungenziwa ngemuva kokushisela inani elithile lama-welds.
