42CrMo xaashi bir duuban oo kulul /bar

42CrMo4 waa bir loogu talagalay deminta iyo kululaynta, kaas oo leh isku darka wanaagsan ee xoogga iyo qallafsanaanta xaaladda la demiyo iyo xanaaqa. Daminta saliidda ka dib, birta waxay noqon doontaa mid adag ilaa dhexroorka ø60 mm. Qaab-dhismeedka yar-yar ee cabbirrada waaweyni si buuxda uma aha martensite. Birtu waxay khusaysaa adkaynta induction. Adkeydka dusha sare wuxuu dhaafi doonaa min. 53 HRC. 42CrMo4 waa la geyn karaa M-daawaynta si kor loogu qaado mashiinnada.

Halabuurka Kiimikada
Heerka Birta	C	Si	Mn	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%

Guryaha makaanikada

Awood soo saarista σs /MPa (>=)	Xoog xajin σb /MPa (>=)	Dheeraynta δ5 /% (>>)	Dhimista aagga ψ /% (>=)	Saamaynta tamarta nuugista Aku2 /J (>=)	Hardness HBS 100 /3000 max
≥930 (95)	≥1080 (110)	≥12	≥45	≥78 (8)	≤217HB

Si loo kordhiyo nolosha dhimashadda in ka badan 800,000 oo jeer oo dhinta, birta hore loo adkeeyey waxaa lagu adkeyn karaa deminta iyo heerkulka hoose. Marka aad deminayso, preheated at 500-600 ℃ 2-4 saacadood, ka dibna ku hay at 850-880 ℃ waqti go'an (ugu yaraan 2 saacadood), ka dibna ku rid saliid iyo qabooji ilaa 50-100 ℃ iyo qaboojinta hawada, engegnaanta waxay gaari kartaa 50 ka dib deminta -52HRC, si looga hortago dildilaaca, 200 ℃ daawaynta heerkulka hoose waa in isla markiiba la sameeyaa. Daboolista ka dib, engegnaanta waxaa lagu ilaalin karaa in ka badan 48HRC.

42CrMo Birta Daawaynta Kulaylka

Annealing

Annealing in 760 ± 10 ℃, qaboojinta foornada ilaa 400 ℃ ka dibna qaboojinta hawada.

Caadiyan

Caadi ahaan 760 ± 10 ℃, qaboojinta hawada ka dib marka laga baxo foornada.

Qoraalada ku saabsan Deminta iyo Daawaynta Heerarka

Waa in fiiro gaar ah loo yeelo heerkulka qaboojiyaha dareeraha ah. Waana in la hubiyaa inaysan jirin wasakhowga saliidda ama wasakh kale. Haddii kale, adkaanta birta kuma filna ama ka baxayso dheelitirka.

Deminta iyo xanaaqa walxaha birta billet iyada oo aan la farsameyn, ka dibna waxay heli doontaa qallafsanaan aan labis ahayn. Markaa farsamaynta been-abuurka ama shiididdu waa lagama maarmaan ka hor Q+T.