Vacuum furnace quenching hi furnace-a dah a, a lum leh a lum leh a lum loh vang mai a ni lo.

Thil hman man to tak takte chu a ni lo va, hnathawh that lohna-deformation, cracking, uneven hardness te hi a ni. Material batch khatin yuan maktaduai za tam tak a sen theih a, mahse thil chiang lo tak pakhat chuan engkim a tichhe vek thei a ni. A bik takin, quenching atana vacuum furnace hman hian, neitu tam tak chuan boruak thianghlim leh temperature dik tak chu a mamawh vek niin an ngai. Mahse, a then chu furnace atanga lo chhuak a nih chuan a chung lam chu a eng ang maiin a lang a, mahse enfiah a nih chuan harsatna tawk lo, microstructure inang lo tak tak, leh localized crack te pawh a lang chhuak ta... eng nge buaina chu? Dik tak chuan, vacuum quenching hi thil awlsam tak angin a lang thei: Heating → Holding → Quenching, mahse step tin hian a pitfalls a nei vek. Fimkhur lohna tlemte hian i thawhrimna zawng zawng a tichhe thei. 1. loading method directly impacts quenching uniformity. Mi tam tak chuan chhuahna awlsam tak chu an la a, a bungrua bawm khat an dah khawm a, an thun lut mai thin a, mahse, i ngaihtuah tawh ngai em: Engtin nge boruak hi an sem? uneven cooling tih awmzia chu shadowed area-a temperature chu a tlahniam zauh zauh a, core microstructure chu transformation tling lo a tawk a, chu chuan hardness tlakchhamna a thlen a ni. Thil tih dan dik: Clumping awm loh nan part hrang hrang inkar ah spacing tam tak dah la; A laiah hmun sang tak tak dah la, a hmun tinah chuan a hmun tinah boruak a luang chhuak thei ang. Cooling duct block loh nan tray chu a remchan dan angin perforate rawh. Hei hi duhsak bikna a ni lo; Process requirement a ni. 2. Fast heating rate a zawm lutuk lo. Vacuum-ah chuan convection a awm lo; Heat transfer hi radiation hmangin a thleng vek a ni. Temperature a sang lutuk a nih chuan, a bik takin thick-walled parts emaw high-alloy steel emaw a nih chuan a chung lam temperature chu a lum a, a chhung lam chu a lum reng thung-Hei hi "thermal stress" tia hriat a ni a, chu chuan quenching laiin awlsam takin cracking a thlen thei a ni. Thurawn: CR12MOV leh H13 ang chi mold steel te tan emaw, workpiece lian tak tak tan emaw chuan, a chhung leh pawn boruak chu a inthlauhna tur atan intermediate holding step (eg, minute 30 chhung 800 degree) pe rawh. Preheat tha tak leh step skip loh tur a ni. Slow zawka kal hi a takin a him zawk. 3. quenching leh cooling: a pawimawh ber leh a hlawhchham duh ber. Vacuum furnace tam zawk chuan pressurized quenching atan high-purity nitrogen emaw argon emaw an hmang a, pressure chu a tlangpuiin 0.6–2.0 MPa inkar a ni. Mahse, factory tam tak chuan setpoint chauh an ngaihtuah a, performance tak tak lam erawh an ngaihtuah lo. Harsatna tlangpui: Gas thianghlimna hi a tawk lo a, oxygen emaw moisture content emaw hian cooling speed leh surface quality a nghawng a; Nozzle blockage emaw fan efficiency tihtlem emaw chuan cooling inang lo a thlen a; Step awm lohna-by-step pressure control, a bul atanga pressure sang tak thlen thei chuan part deformation a thlen thei. Tips: Gas dew point chu a vawt theih nan enfiah fo tur a ni; Quenching hmain fan leh nozzle dinhmun enfiah hmasa phawt ang che; Complex workpieces tan chuan "staged pressurization" mode hman theih a ni: pre-phase transition tihfel nan pressure tihsan hmain pressure hniam takah cooling. 4. furnace atanga workpiece lakchhuah nan hun rei tak an nghak lo. Furnace chu a tawp tawh chuan mi tam tak chuan a parts te chu an la chhuak nghal vat lo va, "tlem a rei zawk chuan a ti thei ang" tiin an ngai a ni. Mahse, vacuum furnaces chu insulated tha tak a ni a, a then chu a chhungah zawi zawiin a lum a, chu chuan optimal pre-tempering temperature a pelh theih a, chu chuan a hnu lama tempering hman tangkai dan a ti tlem thei a ni. A pawi zawk chu martensitic structure thenkhat chu low temperature zone-ah rei tak an awm a, crack an nei awlsam hle.