Steel casting part hrang hrangte chu heat treatment hman tlanglawn tak a ni.

4. Tempering: Tempering chu AC-a heating, temperature thlan chhuah hnuaiah, hun bituk hnua insulation, cooling rate dik takah, unstable tissue hnua quenching emaw ignition emaw, stable organization-a quenching emaw ignition siam, quenching (or ignition) tihbo leh cast steel cast-te plasticity leh toughness tihchangtlunna tur, quenching emaw ignition emaw a ni. A tlangpuiin quenching leh high temperature tempering treatment tih hi quality adjustment treatment an ti thin. Quenching steel casting chu a hun takah tempered a ngai a, a tul hunah hot steel casting pawh a temper tur a ni. Tempering hnua steel casting performance chu tempering temperature, time leh times ah a innghat a ni. Tempering temperature a san leh a hun a rei chhoh zel avangin, steel casting parts quenching stress tihbo bakah, unstable quenching martensite chu tempering martensite, support emaw sotensite-ah a chantir a, chutiang chuan cast steel chakna leh hardness chu a tlahniam a, plasticity pawh nasa takin a tichangtlung a ni. Carbide siamna chak tak awmna alloy element thenkhat (chromium, molybdenum, vanadium leh tungsten, etc.) te tan chuan, 400~500 degree-a hardness leh toughness tlahniam zel phenomenon chu secondary hardening an ti a, chu chu, tempering state-a cast steel hardness chuan a hlutna sang ber a thleng a ni. A tlangpuiin, secondary hardening characteristic nei medium alloy casting steel chu tempered nawn leh (1~3 times) a ngai a ni.
Steel casting parts tempering hi low temperature tempering leh temperature hrang hranga temperature tempering sang takah then theih a ni.
(1) Low-temperature tempering: A tlangpuiin temperature range 150~250 degree-a tih a ni. Tempering hnuah chuan boruak a lum thei a, oil a lum thei a, tui a lum thei bawk. A tum ber chu quenching stress tihbo a, chutih rualin casting chakna sang tak leh khauh tak chu vawng reng a ni. A bik takin carburization, surface quenching leh wear-resistant steel casting parts te chu hardness sang tak mamawh a ni.
(2) Temperature tempering sang: Temperature tempering temperature sang chu 500~650℃a ni a, insulation hun remchang hnuah a lum bawk. A chhan ber chu quenching emaw regular ignition hnua cast steel organization atan hman a ni a, chuvang chuan carbon steel chakna sang tak leh toughness tha tak a nei a, low and medium alloy steel casting a nei bawk. Aling brittleness hi harsatna a ni a, alloy steel castings tempering process siam huna ngaihven tur a ni. A hnuaia temperature range pahnih ah hian a awm thei.
Brittleness at 250 to 400℃: Cast steel Quinto Martensitisue hian he temperature range ah hian tempering brittleness a siam a. He brittle temperature area tempering aiin a sang deuh a nih chuan he tempering fragility hi tihbo theih a ni. Tin, a hnuah chuan a chunga temperature range-ah hian tempering brittleness a awm dawn lo va, chuvangin tempering brittleness chi khatna an ti fo thin.
Brittleness hi 400~500℃(650℃pawh nise ) ah a awm a: hei hi low alloy cast steel tam zawk tan a thleng a, chu chu cast steel temperature tempering brittleness sang tak a awm tihna a ni. He temperature range-a brittle tawh steel casting chu 600.-ah dah leh a ni a, chu chu C (or 650℃) aia sang a ni a, chutah chuan tui emaw oil emaw-ah rang takin a lum a, chu chuan he brittleness hi a ti bo a ni. Mahse, a fragility tihbo tu casting, tempering brittleness siamtu temperature-a lumna ang chi, brittleness chu a lo lang leh ang. Hei hi tempering fragility chi hnihna an ti fo thin.
5. Solid Solution Treatment: Solid Solution Treatment hi heat treatment process a ni a, casting chu temperature leh insulation dik takah a lum a, excess phase chu a fully dissolve a, chutah chuan rapid cooling chu oversaturated solid solution hmuh theih a ni. Solid solution hmanga enkawlna hian a tum ber chu solid solution-a carbide emaw, precipitated phase dang emaw chu oversaturated monophasic organization hmuh theihna tura tihthianghlim a ni. A rilru a buai em em a, a rilru a hah em em bawk a, a rilru a buai em em bawk a.