42CrMo ishidi lensimbi egoqiwe eshisayo/ibha

I-42CrMo4 iyinsimbi yokucisha nokuthambisa, enenhlanganisela enhle yamandla nokuqina esimweni esicishiwe nesithambile. Ngemva kokucisha uwoyela, insimbi izoqiniswa ifike kububanzi obuyibha engu-60 mm. I-microstructure yobukhulu obukhulu ayiyona i-martensite ngokugcwele. Insimbi iyasebenza ekuqiniseni induction. Ukuqina kobuso kuzodlula iminithi. 53 HRC. I-42CrMo4 ingalethwa iphathwe nge-M ukuze kuthuthukiswe ukusebenza kahle.

Ukwakheka Kwamakhemikhali
Ibanga Lensimbi	C	Si	UMn	P	S	Cr	Mo	Cu
35CrMo	0.38～0.45%	0.17～0.37%	0.50～0.80%	≤0.035%	≤0.035%	0.90～1.20%	0.15～0.25%	≤0.30%

Izakhiwo zemishini

Amandla okukhiqiza σs/MPa (>=)	Amandla okuqina σb/MPa (>=)	Ukwelula δ5/% (>=)	Ukuncishiswa kwe indawo ψ/% (>=)	Umthelela amunca amandla Aku2/J (>=)	Ubulukhuni HBS 100/3000 ubuningi
≥930(95)	≥1080(110)	≥12	≥45	≥78(8)	≤217HB

Ukuze kwandiswe impilo yokufa ibe izikhathi zokufa ezingaphezu kuka-800,000, insimbi eqiniswe ngaphambili ingaqiniswa ngokucisha kanye nokushisa okuphansi kwezinga lokushisa. Lapho ucisha, preheat at 500-600 ℃ amahora 2-4, bese uyigcina ku-850-880 ℃ isikhathi esithile (okungenani 2 amahora), bese uyifaka emafutheni futhi upholile ku-50-100 ℃ futhi Ukupholisa komoya, ubulukhuni bungafinyelela ku-50 ngemuva kokucisha -52HRC, ukuze kuvinjwe ukuqhekeka, ukwelashwa kokushisa okuphansi okungama-200 ℃ kufanele kwenziwe ngokushesha. Ngemuva kokushisa, ubulukhuni bungagcinwa bungaphezu kwama-48HRC.

42CrMo Steel Ukwelashwa Kokushisa

Anealing

I-Annealing ku-760±10℃, ukupholisa kwesithando somlilo kuya ku-400℃ bese kuba ukupholisa komoya.

Ukujwayela

Ukwenza kube ngokwejwayelekile ku-760±10℃, ukupholisa komoya ngemva kokuphuma esithandweni.

Amanothi Mayelana Nokwelapha Nokuthulisa

Kumele unake izinga lokushisa le-coolant liquid. Futhi kufanele uqiniseke ukuthi akukho ukungcoliswa kwamafutha noma okunye ukungcola. Uma kungenjalo, ubulukhuni bensimbi ngeke kwanele noma buphume ebhalansi.

Ukucisha nokushisa kwezinto zensimbi ye-billet ngaphandle kokucubungula, khona-ke kuzothola ubulukhuni obungajwayelekile. Ngakho-ke ukucubungula kokufoja noma ukugaya kuyadingeka ngaphambi kwe-Q+T.