Steel Casting daw ni hpe katsi ai hku tsi lajang ai lam galaw ai

N bung ai nbung laru hte katsi ai masa ni hte maren, n-gun n bung ai n-gun dat ni hpe n-gun jaw ai lam a madung katsi ai tsi ladat ni gaw: annealing, aten tup wan hkru ai lam, hkum hkrang n-gun jat ai lam, n-gun rawng ai lam, n-gun ja ai lam, ngang kang ai hparan ladat, marang htu ai lam hpe n-gun ja hkra galaw ai lam, myit ru myit tsang lam ni hpe yeng seng kau ai tsi ladat hte hydrogen hpe yeng seng kau ai tsi ladat ni rai nga ai.
. Annealing a yaw shada ai lam gaw, cast steel a jak rung atsam ni hpe grau kaja hkra galaw na matu, columnar crystal, Wei tissue hte dendritic segregation hpe yeng seng kau na matu re. Carbon steel gaw annealing tissue: subbatch cast steel gaw ferite hte pearlessite, cobatch cast steel gaw pearlite, subbatch cast steel rai nga ai. Grade yawng hpe steel casting galaw na matu.
2. Kaja ai wan: Kaja ai wan gaw, A 3 nbung katsi ai hta jan nna 30~50℃du hkra n-gun dat hpe katsi shangun ai, n-gun rawng ai wan n-gun hpe tsep kawp n-gun n rawng hkra galaw ai, dai hpang n shamu n shamawt ai nbung hta katsi mat ai. Wan hkru ai lam a yaw shada ai lam gaw, ra ai jak rung atsam ni hpe lu la na matu hte, hpang na katsi ai hpe tsi lajang na matu hkyen lajang ai tsi ladat hku nna, n-gang hpe gram lajang na matu re. Wan hkru ai lam hte annealing galaw ai lam ni hta shai hkat ai lam lahkawng nga ai: langai gaw nbung katsi ai lam grau law ai; kaga langai mi gaw grau lawan ai katsi ai lam re. Annealed cast steel a n-gun gaw annealed cast steel hta loi mi grau tsaw ai, shi a pearl hkum hkrang wuhpung wuhpawng gaw loi mi sha nga ai. Carbon steel hte alloy steel casting nkau mi hpe n-gun kaba ai hte n-gun ja ai hkrang ni hpe law malawng gaw aten tup wan hkru ai hku galaw ai. Normal wan gaw co-cast steel hte over-cast steel hta mesh carbide hpe yeng seng kau ya lu nna, shinggyim masha ni a shinggyim nga pra masa hpe n-gun jaw ya lu ai, n-gun n-gun hte n-gun n-gun hpe gram lajang na matu, n-gun n-gun hte alloy structural steel hpe n-htum shi yang, hkyen lajang ai tsi ladat hku nna jai lang mai ai, dai hku nna, shat shadu ai shaloi, casting a majaw byin pru wa ai n-gun n-gun ni hpe shayawm ya lu ai.
. Hka lum ai hpe n-gun jaw ai, sau katsi ai hte nbung katsi ai hpe n-gun jaw ai. Hkap la ngut ai hpang, steel casting daw ni hpe aten dep n-gun shayawm nna, n-gun n-gun hpe yeng seng kau nna, ra ai hkum tsup ai jak rung atsam ni hpe lu la na matu .
steel casting daw ni hpe shinggrup da ai lam a madung parameters ni:
(1) Nbung katsi ai lam: hka lim ai nbung katsi ai lam gaw, cast steel a chemical n-gun hte dai hte maren ahkyak ai nbung katsi ai shara hta madung nga ai. Npawt tara hku nna, A. 20~30℃ntsa kaw nna, hkum tsup ai shat shadu ai lam ngu nna tsun ma ai. A. Lahta na 30~50℃htum mat ai lam gaw, subcritical quenching ngu ai (sh) daw lahkawng na ginra hpe n-gun jaw ai lam re. Ndai quenching hpe subcoanalysis n-gang a matu mung lang mai ai, lu la ai tissue gaw, n-gun n law ai n-gang n-gun n-gun n-gun n-gun n-gun n-rawng ai majaw, n-gup n-gu n-gun n-gun n-gun n-rawng ai.
(2) Hkap la ai lam: shat sha ai lam a yaw shada lam gaw, hkum tsup ai martensite uhpung hpe lu la na matu re. Ndai lam a majaw, katsi ai hpe htum mat ai shaloi, casting gaw, cast steel a ahkyak ai katsi ai lam hta grau kaba ra ai. N rai yang, martensitic tissue hte dai hte bung ai atsam ni hpe n lu la ai. Raitim, grai katsi ai n-gun gaw, casting hpe galai shai ai (sh) n-gun n rawng hkra galaw na matu loi ai. Lahta na ra kadawn ai lam ni hpe kalang ta hkan sa lu na matu, htap htuk ai shingbyi shara hpe casting a arung arai ni hte maren lata la ra ai, shing nrai kaga katsi ai ladat ni (ga shadawn, graded cooling) hpe lata la ra ai. 650~400℃steel lapran hta, dai hpe shat shadu ai aten hta ndai nbung katsi ai aten hta katsi hkra galaw ra ai. lawu na Ms point cooling gaw n-gun n rawng ai (sh) n-gun n rawng ai hpe pat shingdang na matu n-gun yawm mat na hpe myit mada da ai. Quenching medium gaw wan, hka htung, sau, nbung hpe lang chye ai. Jawng lung ai aten (sh) .