Heat treatment analysis leh ductile cast iron solution te .

Carbonizing body chu flocculent graphite-a a chantir theih nan malleable iron ductile iron annealing bakah, cast iron-te heat treatment tum chu kawng hnih-ah a awm a: pakhat chu matrix organization thlak danglam a, cast iron performance tihchangtlun a ni a, pakhat chu casting stress tihbo a ni. Hriat tur chu casting-a heat treatment hian casting original graphite shape leh distribution a thlak danglam thei lo tih hriat a tha a, chu chu graphite original heat treatment of sheet emaw spherical emaw chu sheet emaw spherical emaw a la ni reng a, chutih rual chuan a size pawh a danglam lo ang, distribution pawh a danglam dawn lo.
1. Ductile cast iron aging .
Casting kalpui danah chuan cast iron cooling speed chu a chung lam atanga a chhung lam thlengin a danglam a, casting chhungril stress a siam a ni. A tihbo loh chuan a parts te chu a deform emaw a crack emaw pawhin a cut ang a, a hmang thei ang. Stress chhuah nan hian artificial aging leh natural aging te hi hman a ni fo thin. Casting chu 500~560℃vel ah hun engemaw chen lum la, chutah chuan furnace cold nen casting chu la chhuak rawh. He aging hi artificial aging a ni. Natural aging chu cast iron chu pawnah thla 6~18 chhung dah a, stress chu natural takin a chhuah tir a, chu chuan stress part chu a chhuah tir thei a, mahse hun rei tak leh efficiency hniam tak avangin hman a ni lo.
2. Heat treatment atana hman tur cast iron parts te performance pumpui tihchangtlun .
Cast iron performance zawng zawng tihchangtlun nan, white mouth annealing tihbo a, ductile iron annealing toughness tihchangtlun nan, ductile iron ignition chakna siam that, quenching, etc. te.
(1) a ni. Positive ignition hmanga ductile iron chakna siam that .
Ductile iron ignition hian matrix tissue chu fine pearlite tissue-a chantir a tum a ni. A kalphung chu ductile iron casting a matrix chu ferrite leh pearliite 850-900℃thlenga tih lum leh a ni a, original ferrite leh pearlizite chu austenite-ah a chantir a, spherical graphite thenkhat chu austenite-ah a hmin bawk. Insulation hnuah chuan air-cooled austenite chu beads tha takah a inthlak a, chuvangin casting chakna chu a sang chho ta a ni.
(2) a ni. Ductile iron annealing a toughness siam that .
Casting process-ah chuan grey cast iron pangngai chu a var zawk a, chu pawh chu internal stress a ni zawk bawk. Cast iron hi iron taksa thianghlim emaw pearletic matrix emaw hmuh a harsa hle. Iron cast-te ductility emaw toughness tihchangtlun nan chuan cast iron chu 900-950 degree-ah an dah leh fo va, temperature sang tak annealing atan hun tling tak an insulate a, chutah chuan furnace chu 600 degree-ah a lum a, a lum theih nan. Chutiang a nih lai chuan matrix chhunga carburite chuan graphite chu a ti chhe a, graphite chu austenite atang chuan a rawn chhuak ta a ni. Heng graphite te hi original spherical graphite vel ah an awm khawm a, matrix chu ferrite ah an chantir vek a ni.
Cast tissue chu (Ferrite + Pearlite) matrix leh spherical graphite atanga siam a nih chuan, toughness tihchangtlun nan chuan pearlite chhunga carburised body chu kan decompose a, ferrite leh spherical graphite ah kan chantir mai tur a ni. Hemi avang hian iron casting chu coprecipitation temperature 700-760 degree-ah dah leh a ni a, furnace chu 600 degree-ah a lum a, a lum leh a ni.
(3) a ni. Isothermal quenching hmanga ductile cast iron hmanga enkawl a ni.
Ductile iron isothermal quenching treatment tum ber chu iron cast matrix tissue chu lower bainite tissue chak takah a chantir a, strength limit chu 1100mpa aia tam a ni thei a, impact toughness AK 32J a ni. Enkawl dan tur chu: Ductile iron casting chu 830-870℃temperature insulation substrate austenite-a tihlum hnuah, insulation atan 280-350℃molten salt dah la, chutiang chuan austenite part chu beskite hnuai lam a ni ang a, a bul tanna spherical graphite chu a danglam lo ang. High-strength ductile cast iron nei rawh.
A chunga heat treatment of cast iron hian cast iron hmanga heat treatment hian matrix organization chauh a tidanglam thei tih a tarlang a, graphite pianzia a tidanglam thei lo tih a tarlang bawk.