42CrMo letlapa la tšepe le kolobisitsoeng le chesang/bar

42CrMo4 ke tšepe ea ho tima le ho futhumatsa, e nang le motsoako o motle oa matla le ho thatafala ha boemo bo timme le bo halefileng. Kamora ho tima oli, tšepe e tla thatafalloa ho fihlela bophara ba 60 mm bar. The microstructure ea litekanyo tse kholoanyane ha e na martensite ka ho feletseng. Tšepe e sebetsa ho thatafatsa induction. Ho thatafala holimo ho tla feta min. 53 HRC. 42CrMo4 e ka tsamaisoa ka M-phekolo e le ho ntlafatsa machina.

Sebopeho sa Lik'hemik'hale
Kereiti ea tšepe	C	Si	Mong	P	S	Kr	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%

Thepa ea mechine

Matla a tlhahiso σs/MPa (>=)	Matla a thata σb/MPa (>=)	Elongation δ5/% (>=)	Phokotso ea sebaka ψ/% (>=)	Matla a monyang Aku2/J (>=)	HBS e thata 100/3000 max
≥930(95)	≥1080(110)	≥12	≥45	≥78(8)	≤217HB

E le ho eketsa bophelo ba lefu ho feta makhetlo a 800,000 a shoa, tšepe e thata pele e ka thatafatsoa ke ho tima le mocheso o tlase oa mocheso. Ha o tima, preheat ka 500-600 ℃ bakeng sa lihora tse 2-4, ebe u e boloka ho 850-880 ℃ ka nako e itseng (bonyane lihora tse 2), ebe u e kenya ka oli 'me u pholile ho 50-100 ℃ le moea o pholileng, boima bo ka fihla ho 50 ka mor'a ho tima -52HRC, e le ho thibela ho phunyeha, phekolo ea mocheso o tlaase oa 200 ℃ e lokela ho etsoa hang-hang. Kamora ho halefisa, boima bo ka bolokoa kaholimo ho 48HRC.

Kalafo ea Mocheso oa 42CrMo

Annealing

E kenngoa ka 760±10 ℃, setofo se batang ho isa ho 400 ℃ ebe se pholile moea.

Ho tloaeleha

Ho tloaeleha ho 760±10℃, moea o pholileng ka mor'a hore o tsoe ka sebōping.

Lintlha Tse Mabapi le Phekolo ea ho Koala le ho Fokotsa

E lokela ho ela hloko mocheso oa mokelikeli o pholileng. 'Me u lokela ho etsa bonnete ba hore ha ho na tšilafalo ea oli kapa litšila tse ling. Ho seng joalo, ho thatafala ha tšepe ho ke ke ha lekana kapa ho tsoa ho leka-lekana.

Ho tima le ho futhumatsa bakeng sa thepa ea tšepe ea billet ntle le ts'ebetso, joale e tla fumana boima bo sa tšoaneng. Kahoo ho sebetsa ho forging kapa ho sila hoa hlokahala pele ho Q+T.