Gray Cast Iron Magnetic Properties

Kuyerekeza kwa Iron Gray				Microstructure (Volume Fractions) ((((())
China (GB/T 9439)	ISO 185	ASTM A48/A48M	Mtengo wa EN 1561	Matrix Structure
HT100 (HT10-26)	100	Chithunzi cha 20 F11401	EN-GJL-100	Pearlite: 30-70％, flakes coarse; Kutalika: 30-70%; Binary Phosphorus Eutectic: ＜7％
HT150 (HT15-33)	150	Chithunzi cha 25A F11701	EN-GJL-150	Pearlite: 40-90％, ma flakes apakati; Kutalika: 10-60%; Binary Phosphorus Eutectic: ＜7％
HT200 (HT20-40)	200	Chithunzi cha 30A F12101	EN-GJL-200	Pearlite: ＞95％, ma flakes apakati; Ferrite＜5％; Binary Phosphorus Eutectic ＜4％
HT250 (HT25-47)	250	No.35A F12401 No.40A F12801	EN-GJL-250	Pearlite: ＞98％ ma flakes apakati; Binary Phosphorus Eutectic: ＜2％
HT300 (HT30-54)	300	Chithunzi cha 45A F13301	EN-GJL-300	Pearlite: ＞98％ ma flakes apakati; Binary Phosphorus Eutectic: ＜2％
HT350 (HT35-61)	350	Chithunzi cha 50A F13501	EN-GJL-350	Pearlite: ＞98％ ma flakes apakati; Binary Phosphorus Eutectic: ＜1％

 

Mphamvu ya maginito ya chitsulo chotuwira chimasiyana mosiyanasiyana, kuyambira kutsika pang'ono komanso mphamvu yokakamiza kwambiri mpaka kulowera kwambiri komanso kutsika kokakamiza. Zosintha izi makamaka zimadalira mawonekedwe a chitsulo chotuwa. Kuwonjezera zinthu alloying kupeza zofunika maginito katundu zimatheka ndi kusintha kapangidwe ka imvi kuponyedwa chitsulo.

Ferrite ali mkulu maginito permeability ndi otsika hysteresis imfa; pearlite ndizosiyana, zimakhala ndi maginito otsika kwambiri komanso kutaya kwakukulu kwa hysteresis. Pearlite amapangidwa kukhala ferrite ndi annealing kutentha mankhwala, amene angathe kuonjezera maginito permeability kanayi. Kukulitsa mbewu za ferrite kumachepetsa kutayika kwa hysteresis. Kukhalapo kwa simenti kudzachepetsa kachulukidwe ka maginito, kukhazikika komanso kukhazikika, ndikuwonjezera kutayika komanso kutayika kwa hysteresis. Kukhalapo kwa coarse graphite kumachepetsa kukhazikika. Kusintha kuchokera ku A-mtundu wa graphite (graphite yooneka ngati flake yomwe imagawidwa mofanana popanda chitsogozo) kupita ku D-mtundu wa graphite (graphite yopindika bwino ndi kugawa kosagwirizana pakati pa dendrites) ikhoza kuonjezera kwambiri kulowetsa maginito ndi mphamvu yokakamiza. .

Asanafike pa kutentha kosafunikira kwa maginito, kukwera kwa kutentha kumawonjezera mphamvu ya maginito yachitsulo chotuwira. Curie point of pure iron ndi kutentha kwa α-γ kwa 770°C. Pamene kuchuluka kwa silicon ndi 5%, Curie point idzafika 730 ° C. Kutentha kwa Curie point kwa simenti popanda silicon ndi 205-220 ° C.

Maonekedwe a matrix omwe amagwiritsidwa ntchito nthawi zambiri achitsulo chotuwira chotuwira amakhala makamaka pearlite, ndipo kuthekera kwawo kokwanira kuli pakati pa 309-400 μH/m.

 

Magnetic Properties of Gray Cast Iron
Kodi Gray Iron	Kupanga Kwamankhwala (%)
	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
Maginito Properties		A		B		C
		Pearlite	Ferrite	Pearlite	Ferrite	Pearlite	Ferrite
Mpweya wa Carbide 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
Mphamvu ya Magnetic Field / kA•m-1 (B=1T)		15.9	-5.9	8.7	8.0	6.2	4.4
Max. Maginito Permeability / μH•m-1		396	1960	353	955	400	1703
Mphamvu ya Magnetic Field pamene Max. Magnetic Permeability / A•m-1		637	199	1035	318	1114	239
Kukaniza / μΩ•m		0.73	0.71	0.77	0.75	0.42	0.37

 

Pano pali mawotchi omwe amapangidwa ndi chitsulo cha gray cast:

Katundu Wamakina a Grey Cast Iron
Zinthu molingana ndi DIN EN 1561	Yesani	Chigawo	EN-GJL-150	EN-GJL-200	EN-GJL-250	EN-GJL-300	EN-GJL-350
			EN-JL 1020	Chithunzi cha EN-JL 1030	Chithunzi cha EN-JL1040	Mtengo wa EN-JL 1050	Chithunzi cha EN-JL1060
Kulimba kwamakokedwe	Rm	MPA	150-250	200-300	250-350	300-400	350-450
0.1% Mphamvu Zokolola	rp0,1	MPA	98-165	130-195	165-228	195-260	228-285
Elongation Mphamvu	A	%	0, 3 - 0, 8	0, 3 - 0, 8	0, 3 - 0, 8	0, 3 - 0, 8	0, 3 - 0, 8
Compressive Mphamvu	σdB ndi	MPa	600	720	840	960	1080
0,1% Compressive Mphamvu	s0, 1	MPa	195	260	325	390	455
Flexural Mphamvu	σbB	MPa	250	290	340	390	490
Schuifspanning	σaB	MPa	170	230	290	345	400
Shear Stress	TtB	MPa	170	230	290	345	400
Ma modules a elasticity	E	GPA	78-103	88-113	103-118	108-137	123-143
Poisson nambala	v	-	0,26	0,26	0,26	0,26	0,26
Brinell kuuma		HB	160-190	180-220	190-230	200-240	210-250
Ductility	σbw	MPa	70	90	120	140	145
Kupanikizika ndi kupanikizika kumasintha	σzdW	MPa	40	50	60	75	85
Kuphwanya Mphamvu	Klc	N/mm3/2	320	400	480	560	650
Kuchulukana		g/cm3	7, 10	7, 15	7,20	7, 25	7,30