42CrMo kub dov steel ntawv / bar

42CrMo4 yog cov hlau rau quenching thiab tempering, uas muaj kev sib xyaw ua ke zoo ntawm lub zog thiab tawv hauv qhov kub thiab txias. Tom qab cov roj quenching, cov hlau yuav los ntawm hardened mus txog ø60 hli bar txoj kab uas hla. Lub microstructure ntawm qhov loj me tsis yog tag nrho martensite. Cov hlau yog siv rau induction hardening. Qhov saum npoo hardness yuav tshaj min. 53 HRC. 42CrMo4 tuaj yeem xa M-kho tau txhawm rau txhawm rau ua kom zoo dua qub.

Tshuaj muaj pes tsawg leeg
Qib Steel	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%

Mechanical zog

Yield zog σs/MPa (>=)	Tensile zog σb / MPa (> =)	Elongation δ5/% (>=)	Txo ntawm thaj tsam ψ/% (>=)	Impact absorbing zog Aku2/J (>=)	Hardness HBS 100/3000 max
≥930(95)	≥1080 (110)	≥12	≥45	≥78(8)	≤ 217 HB

Txhawm rau ua kom lub neej tuag ntau dua 800,000 lub sijhawm tuag, cov hlau ua ntej tuaj yeem ua kom tawv tawv los ntawm quenching thiab kub tempering. Thaum quenching, preheat ntawm 500-600 ℃ rau 2-4 teev, thiab tom qab ntawd cia nws ntawm 850-880 ℃ rau ib lub sijhawm (tsawg kawg 2 teev), ces muab tso rau hauv roj thiab txias rau 50-100 ℃ thiab cua txias, lub hardness tuaj yeem ncav cuag 50 tom qab quenching -52HRC, txhawm rau tiv thaiv kev tawg, 200 ℃ kub tempering kho yuav tsum tau nqa tawm tam sim. Tom qab tempering, lub hardness tuaj yeem khaws cia siab tshaj 48HRC.

42CrMo Steel Thaum tshav kub kub kho

Annealing

Annealing nyob rau hauv 760 ± 10 ℃, rauv txias rau 400 ℃ ces cua txias.

normalizing

Normalizing nyob rau hauv 760 ± 10 ℃, cua txias tom qab tawm ntawm lub cub tawg.

Cov Lus Qhia Txog Quenching thiab Tempering Treatment

Yuav tsum xyuam xim rau qhov kub ntawm cov kua coolant. Thiab yuav tsum xyuas kom meej tias tsis muaj roj paug lossis lwm yam impurities. Txwv tsis pub, lub hardness ntawm steel yuav tsis txaus los yog tawm ntawm qhov sib npaug.

quenching thiab tempering rau cov khoom siv hlau tsis muaj kev ua haujlwm, tom qab ntawd nws yuav tau txais cov khoom tsis sib xws. Yog li kev ua ntawm forging lossis sib tsoo yog qhov tsim nyog ua ntej Q + T.