Gray Cast Iron Magnetic Properties

Grey Iron Papiso				Microstructure (Likaroloana tsa Molumo) (((())
China (GB/T 9439)	ISO 185	ASTM A48/A48M	EN 1561	Sebopeho sa Matrix
HT100 (HT10-26)	100	No.20 F11401	EN-GJL-100	Pearlite: 30-70％, li-flakes tse mahoashe; Ferrite: 30-70％; Binary Phosphorus Eutectic: ＜7％
HT150 (HT15-33)	150	No.25A F11701	EN-GJL-150	Pearlite: 40-90％, li-flakes tse mahareng tse mahareng; Ferrite: 10-60％; Binary Phosphorus Eutectic:＜7％
HT200 (HT20-40)	200	No.30A F12101	EN-GJL-200	Pearlite: ＞95％, li-flakes tse mahareng; Ferrite＜5％; Binary Phosphorus Eutectic ＜4％
HT250 (HT25-47)	250	No.35A F12401 No.40A F12801	EN-GJL-250	Pearlite: ＞98％ li-flakes tse mahareng tse tšesaane; Binary Phosphorus Eutectic:＜2％
HT300 (HT30-54)	300	No.45A F13301	EN-GJL-300	Pearlite: ＞98％ li-flakes tse mahareng tse tšesaane; Binary Phosphorus Eutectic:＜2％
HT350 (HT35-61)	350	No.50A F13501	EN-GJL-350	Pearlite: ＞98％ li-flakes tse mahareng tse tšesaane; Binary Phosphorus Eutectic:＜1％

 

Thepa ea makenete ea tšepe e bohlooho e fapana haholo, ho tloha ho matla a tlase a ho kenella le matla a matla a matla ho isa ho ho kenella ho phahameng le matla a tlase a ho qobella. Liphetoho tsena haholo-holo li itšetlehile ka microstructure ea grey cast iron. Ho eketsa likarolo tsa alloying ho fumana thepa e hlokahalang ea makenete ho finyelloa ka ho fetola sebopeho sa tšepe e bohlooho.

Ferrite e na le matla a matla a khoheli le tahlehelo e tlase ea hysteresis; pearlite e fapane feela, e na le matla a fokolang a matla a khoheli le tahlehelo e kholo ea hysteresis. Pearlite e entsoe ka ferrite ka kalafo ea mocheso e anneal, e ka eketsang matla a khoheli ka makhetlo a mane. Ho eketsa lijo-thollo tsa ferrite ho ka fokotsa tahlehelo ea hysteresis. Ho ba teng ha cementite ho tla fokotsa matla a khoheli a matla a khoheli, permeability le remanence, ha a ntse a eketsa ho felloa ke matla le tahlehelo ea hysteresis. Ho ba teng ha graphite e mahoashe ho tla fokotsa ho sala morao. Phetoho ho tloha ho mofuta oa A-graphite (graphite e bōpehileng joaloka flake e ajoang ka mokhoa o ts'oanang ntle le tataiso) ho ea ho mofuta oa D-graphite (graphite e kobehileng hantle e nang le kabo e sa lekanyetsoang lipakeng tsa dendrites) e ka eketsa haholo matla a khoheli le matla a ho qobella. .

Pele o fihla mocheso o boima oo e seng oa makenete, ho nyoloha ha mocheso ho eketsa haholo matla a khoheli a tšepe e bohlooho. Sebaka sa Curie sa tšepe e hloekileng ke mocheso oa phetoho oa α-γ oa 770°C. Ha karolo ea boima ba silicon e le 5%, ntlha ea Curie e tla fihla ho 730 ° C. Mocheso oa ntlha ea Curie oa cementite ntle le silicon ke 205-220 ° C.

Sebopeho sa matrix sa limaraka tse sebelisoang hangata tsa tšepe e bohlooho haholo ke pearlite, 'me boholo ba tsona bo kenang bo pakeng tsa 309-400 μH/m.

 

Thepa ea Magnetic ea Grey Cast Iron
Khoutu ea Tšepe e Bohlooho	Sebopeho sa Lik'hemik'hale (%)
	C	Si	Mn	S	P	Ni	Cr
A	3.12	2.22	0.67	0.067	0.13	＜0.03	0.04
B	3.30	2.04	0.52	0.065	1.03	0.34	0.25
C	3.34	0.83 - 0,91	0.20 - 0,33	0.021 - 0.038	0.025 - 0.048	0.04	＜0.02
Thepa ea Magnetic		A		B		C
		Pearlite	Ferrite	Pearlite	Ferrite	Pearlite	Ferrite
Carbide Carbon w(%)		0.70	0.06	0.77	0.11	0.88	/
Remanence / T		0.413	0.435	0.492	0.439	0.5215	0.6185
Coercive Force/ A•m-1		557	199	716	279	637	199
Hysteresis Loss / J•m-3•Hz-1 (B=1T)		2696	-696	2729	1193	2645	938
Magnetic Field Strength / kA•m-1 (B=1T)		15.9	-5.9	8.7	8.0	6.2	4.4
Max. Magnetic Permeability / μH•m-1		396	1960	353	955	400	1703
Matla a Tšimo ea Magnetic ha Max. Magnetic Permeability / A•m-1		637	199	1035	318	1114	239
Resistivity/ μΩ•m		0.73	0.71	0.77	0.75	0.42	0.37

 

Mona ho tse latelang ke thepa ea mochini oa tšepe ea grey cast:

Mechanical Properties of Grey Cast Iron
Ntho ho latela DIN EN 1561	Lekanya	Yuniti	EN-GJL-150	EN-GJL-200	EN-GJL-250	EN-GJL-300	EN-GJL-350
			EN-JL 1020	EN-JL 1030	EN-JL 1040	EN-JL 1050	EN-JL 1060
Matla a tšepe	Rm	MPA	150-250	200-300	250-350	300-400	350-450
0.1% Matla a Puno	Rp0,1	MPA	98-165	130-195	165-228	195-260	228-285
Elongation Matla	A	%	0,3 - 0,8	0,3 - 0,8	0,3 - 0,8	0,3 - 0,8	0,3 - 0,8
Matla a Khatellang	σdB	MPa	600	720	840	960	1080
0,1% Matla a Khatellang	σd0,1	MPa	195	260	325	390	455
Flexural Matla	σbB	MPa	250	290	340	390	490
Schuifspanning	σaB	MPa	170	230	290	345	400
Ho Shear Khatello	TtB	MPa	170	230	290	345	400
Li-module tsa elasticity	E	GPA	78-103	88-113	103 - 118	108 - 137	123 - 143
Nomoro ea Poisson	v	-	0,26	0,26	0,26	0,26	0,26
Ho thatafala ha Brinell		HB	160-190	180 - 220	190-230	200 - 240	210 - 250
Ductility	σbW	MPa	70	90	120	140	145
Ho fetoha ha tsitsipano le khatello	σzdW	MPa	40	50	60	75	85
Matla a Qhoba	Klc	N/mm3/2	320	400	480	560	650
Botenya		g/cm3	7,10	7,15	7,20	7,25	7,30