Rapid katsi ai hte htum mat ai gaw, wan wut ai shara hta ra ai hka n-gun hta grau tsaw ai nbung laru hpe tau hkrau makawp maga ra ai. Dai hpang, dai bungli galaw ai shara hpe wan wut ai shara de bang nna, katsi ai (sh) wan n-gun hpe pat kau ai. Hka htung a nbung katsi ai shara de hkrat wa ai shaloi, katsi ai (sh) wan n-gun hpe bai gram lajang nna hkang lu ai. Workshece hpe hkum tsup hkra katsi shangun ngut ai hpang, dai hpe shaw kau nna sat kau ai.
Lawan ai hku katsi ai hte hka lim ai aten hta, wan wut ai shara gaw, hka lim ai shara hta 100–200℃daram tsaw ai majaw, bungli galaw ai shara hpe grai n-gun n-ja hkra makawp maga na matu, nbung katsi ai aten hpe hkang lu na matu, grai ngang kang ai aten hpe hkang ra ai.
Production practice gaw, n-gun n-gun hpe n-gun n-gun hta grau ai℃law law hte sha sharawt ai sha, nbung katsi ai aten hpe grai shayawm ya lu ai hpe madun dan ai. lawan ai hku katsi ai gaw nucleation hpe grau law hkra n-gun jaw ya nna, katsi ai aten kadun ai gaw mam n-gun hpe pat shingdang ya ai majaw, grau htum ai n-gun hpe lu la ai.
Lawan ai hku katsi ai hte n-gun rawng ai ladat gaw, npu na- hte lapran n-gun hpe n-gun jaw ai n-gang ni hte npu n-gang ni hte npu n-gun n-gun n-gun yawm ai n-gang ni a matu htuk manu ai. Ga shadawn, Q345 (shawng nnan e masat da ai 16Mn) n-gang n-gang n-gang n-gang gaw, lawan ai hku katsi ai hte hka lim ai lam hpe jai lang ai (960℃hta 980℃du hkra 980℃du hkra mm langai hta 3.5 kaw nna 5 seconds du hkra katsi ai, 10% NaCl hka hta htum mat ai, 160℃hta minit 90 daram katsi ai). Ndai lam gaw, galu kaba ai cycle aten ni hte bungli galaw ai lam hta n-gun n law ai hpe lai di lu ai (920℃hta mm langai hta second 30 daram katsi shangun ai, 10% NaCl hka hta quenching galaw ai, minit 90 daram 160℃hta katsi katsang rai nga ai). Ndai n-gun ja ai lam hpe 42 kaw nna 44 du hkra HRC de jat wa ai rai nna, shawng nnan na ladat gaw 42 kaw nna 48 HRC du hkra rai nna, ndai lam nnan hpe galaw ai. Dai hte maren, lath marensite mam ni hpe gram lajang ai, ngang kang ai layer sung ai, yawng hkra a jak rung atsam ni hpe grau kaja hkra galaw ya ai.
