Grey Cast Iron Magnetic Properties

Grey Hlau Sib Piv				Microstructure (Volume Fractions) (％)
Tuam Tshoj (GB/T 9439)	ISO 185	ASTM A48 / A48M ASTM	TS EN 1561	Matrix Qauv
HT100 (HT10-26)	100	Nr 20 F11401	EN-GJL-100	Pearlite: 30-70%, coarse flakes; Ferrite: 30-70%; Binary Phosphorus Eutectic: ＜7%
HT150 (HT15-33)	150	No.25A F11701	TSW-GJL-150	Pearlite: 40-90%, nruab nrab coarse flakes; Ferrite: 10-60%; Binary Phosphorus Eutectic: 7%
HT200 (HT20-40)	200	No.30A F12101	TSW-GJL-200	Pearlite: ＞ 95%, nruab nrab flakes; Ferrite 5%; Binary Phosphorus Eutectic 4%
HT250 (HT25-47)	250	No.35A F12401 No.40A F12801	TSW-GJL-250	Pearlite: ＞98% nruab nrab nyias flakes; Binary Phosphorus Eutectic: ＜2％
HT300 (HT30-54)	300	No.45A F13301	EN-GJL-300	Pearlite: ＞98% nruab nrab nyias flakes; Binary Phosphorus Eutectic: ＜2％
HT350 (HT35-61)	350	No.50A F13501	EN-GJL-350	Pearlite: ＞98% nruab nrab nyias flakes; Binary Phosphorus Eutectic: 1%

 

Cov khoom sib nqus ntawm grey cam khwb cia hlau sib txawv, los ntawm qis permeability thiab siab coercive quab yuam mus rau siab permeability thiab tsawg coercive quab yuam. Cov kev hloov no feem ntau yog nyob ntawm qhov microstructure ntawm grey cam khwb cia hlau. Ntxiv cov ntsiab lus alloying kom tau txais cov khoom sib nqus uas yuav tsum tau ua tiav los ntawm kev hloov cov qauv ntawm grey cam khwb cia hlau.

Ferrite muaj siab sib nqus permeability thiab qis hysteresis poob; pearlite tsuas yog qhov sib txawv, nws muaj qhov sib nqus permeability tsawg thiab loj hysteresis poob. Pearlite yog tsim rau hauv ferrite los ntawm kev kho cua sov, uas tuaj yeem ua kom cov hlau nplaum permeability los ntawm plaub zaug. Loj ferrite nplej tuaj yeem txo hysteresis poob. Lub xub ntiag ntawm cementite yuav txo qhov sib nqus flux ceev, permeability thiab remanence, thaum ua kom cov permeability thiab hysteresis poob. Lub xub ntiag ntawm ntxhib graphite yuav txo cov remanence. Kev hloov los ntawm A-type graphite (lub flake-shaped graphite uas yog uniformly faib tsis muaj kev taw qhia) mus rau D-hom graphite (ib tug zoo curled graphite nrog ib tug uas tsis yog-directional tis ntawm dendrites) muaj peev xwm ho nce lub magnetic induction thiab coercive quab yuam. .

Ua ntej mus txog qhov ntsuas kub tsis sib nqus, qhov kub thiab txias nce qhov sib nqus permeability ntawm grey cam khwb cia hlau. Curie point ntawm cov hlau ntshiab yog α-γ kev hloov pauv kub ntawm 770 ° C. Thaum qhov loj feem pua ​​ntawm silicon yog 5%, Curie point yuav ncav cuag 730 ° C. Curie point kub ntawm cementite tsis muaj silicon yog 205-220 ° C.

Cov qauv matrix feem ntau siv qib ntawm grey cam khwb cia hlau feem ntau yog pearlite, thiab lawv cov permeability siab tshaj plaws yog nyob nruab nrab ntawm 309-400 μH / m.

 

Magnetic Properties ntawm Grey Cast Iron
Code ntawm Grey Hlau	Chemical Composition (%)
	C	Si	Mn	S	P	Ni	Cr
A	3.12	2.22	0.67 ib	0.067 ib	0.13	0.03	0.04 ib
B	3.30 Nws	2.04 Nws	0.52 ib	0.065 ib	1.03 ib	0.34 ib	0.25
C	3.34 ib	0.83-0.91 Nws	0.20-0.33 Nws	0.021-0.038 hli	0.025-0.048 hli	0.04 ib	0.02
Magnetic Properties		A		B		C
		Pearlite	Ferrite	Pearlite	Ferrite	Pearlite	Ferrite
Cov pa roj carbon monoxide (%)		0.70 ib	0.06 ib	0.77 ib	0.11	0.88 ib	/
Remanence / T		0.413 ib	0.435 ib	0.492 ib	0.439 ib	0.5215 ib	0.6185 ib
Coercive Force / A•m-1		557 ib	199	716 ib	279	637 ib	199
Hysteresis Loss / J•m-3•Hz-1 (B=1T)		2696 ib	-696	2729 ib	1193	2645 ib	938 ua
Sib nqus Field Strength / kA•m-1 (B = 1T)		15.9 ib	-5.9	8.7 ib	8.0 ib	6.2	4.4
Max. Sib nqus Permeability / μH•m-1		ib 396	Xyoo 1960	353	955 ua	400	1703 ib
Sib nqus Field Strength thaum Max. Sib nqus Permeability / A•m-1		637 ib	199	1035 ib	318	1114	239
Resistivity / μΩ•m		0.73 ib	0.71 ib	0.77 ib	0.75 ib	0.42 ib	0.37 ib

 

Ntawm no yog cov hauv qab no yog cov cuab yeej cuab tam ntawm grey cam khwb cia hlau:

Mechanical Properties ntawm Grey Cam khwb cia hlau
Cov khoom raws li DIN EN 1561	Ntsuas	Chav tsev	TSW-GJL-150	TSW-GJL-200	TSW-GJL-250	EN-GJL-300	EN-GJL-350
			EN-JL 1020	TIAB SA 1030	TIAB SA 1040	EN-JL 1050	EN-JL 1060
Tensile zog	Rm	MPA	150-250	200-300	250-350	300-400	350-450 : kuv
0.1% Yield zog	rp0, 1	MPA	98-165 : kuv	130-195 : kuv	165-228 : kuv	195-260 : kuv	228-285 : kuv
Lub zog elongation	A	%	0, 3-0, 8	0, 3-0, 8	0, 3-0, 8	0, 3-0, 8	0, 3-0, 8
Compressive zog	σ dB	MPa	600	7 20	840 ua	960 ua	1080
0.1% Compressive zog	d0,1 ua	MPa	195	260	325	390	455
Flexural zog	SB IB	MPa	250	290	340	390	490 ib
Schuifspanning	σ aB	MPa	170	230	290	345	400
Shear Stress	TtB	MPa	170	230	290	345	400
Module ntawm elasticity	E	GPa	78–103 : kuv	88-113 : kuv	103-118 : kuv	108-137 : kuv	123-143 : kuv
Poisson naj npawb	v	-	0,26 ib	0,26 ib	0,26 ib	0,26 ib	0,26 ib
Brinell hardness		HB	160-190 : kuv	180-220 : kuv	190-230 : kuv	200-240 Nws	210-250 : kuv
Ductility	s wb	MPa	70	90	120	140	145
Kev ntxhov siab thiab kev hloov siab	wb zd	MPa	40	50	60	75	85
Txoj Kev Ua Zog	Klc	N/mm3/2	320	400	480	560	650
Qhov ntom		g/cm3	7,10 ib	7,15 ib	7,20 ib	7,25 ib	7,30 ib