A vawi khatna atan chuan metal welding performance tichhe thei thil 4 a awm a, chutah chuan material factors te pawh a tel. Vawiin hian thil dang pathumte hi han thlir ila.
2. Process factors te .
Process factors hrang hrangah welding method, welding process parameters, welding sequence, preheating, post-heating leh post-weding heat treatment te a awm a. in welding method a hman hian Automatic welding tracking system- weldability-ah nghawng nasa tak a nei a, hei hi a bik takin heat source characteristic leh protection condition-ah a lang chiang hle.
Welding method hrang hrang hian power, energy density, leh maximum heating temperature lamah heat source hrang hrang an nei a. Heat source hrang hrang hnuaia welded metal-te chuan welding performance hrang hrang an lantir ang. Entirnan, electroslag welding power a sang hle a, mahse energy density a hniam hle a, a lumna sang ber a sang lo va, welding laiin a lumna a slow lo a, a awmna hmun a sang hle a, hei hian heat-affected zone grain chu a coarse a, impact toughness chu nasa takin a tlahniam a ni. Normalized a ni tur a ni. hmasawn. Chumi danglamna chu electron beam welding leh laser welding ang chi method te hian power hniam tak an nei a, mahse energy density sang tak leh heating chak tak an nei thung. High temperature residence time a tawi a, heat-affected zone pawh a tawi hle a, grain growth hlauhawmna a awm lo bawk.
Welding process parameters te chu siamrem la, preheating, post-heating, multi-layer welding te la la, interlayer temperature leh process measure dang control la, welding thermal cycle siam that leh control la, chu chuan metal weldability a thlak danglam ang. Welding hmaa preheating emaw welding hnua heat treatment emaw tih ang chi measures te hi lak a nih chuan crack defect leh performance requirements zawm lovin welded joint hmuh theih a ni vek.
Stainless steel industrial pipe eng tak siam i duh chuan post-weld heat treatment hi hman a tha zawk. A chhan chu steel chu a lo pian hmain heat-treated ni mahse, bending leh forming series hnuah pawh material stress chu a la pung zel a ni. Mahse, welding hnua on-line heat treatment hian boruak tightness leh shielding gas boruak a tichiang thei mai bakah weld quality a ti tha a, material softness a ti sang thei bawk. Material heat treatment a sang deuh chuan i ngaihtuah thei ang . Hangao Tech (Seko Machinery) A lumna humhalhna chi bright annealing machine of . Induction hmanga tihlum . Annealing pangngai aiin heat preservation area a nei tam zawk a, hei hian metal chu ductility tha zawk leh tensile resistance a pe thei a ni.
3. Structural factors .
A bul berah chuan welded structure leh welded joint design form, structural shape, size, thickness, joint groove form, weld layout leh cross-sectional shape, etc. on weldability te a huam a ni. A nghawng hi heat transfer leh force dinhmunah a lang ber a ni. Plate thickness hrang hrang, joint form hrang hrang emaw groove shape hrang hrang te hian heat transfer speed direction leh heat transfer speed hrang hrang an nei a, hei hian molten pool crystallization direction leh grain growth a nghawng dawn a ni. Structure switch, plate thickness leh welding seam layout, etc. te hian joint stiffness leh restraint a tichiang a, joint stress state a nghawng bawk. Crystalline morphology tha lo, stress concentration na tak leh welding stress nasa lutuk te hi welding crack siamna atana hman tur bulpui ber a ni. Design-ah chuan, joint stiffness tihtlem te, cross weld tihtlem te, leh stress concentration thlentu thil hrang hrang tihtlem te hi weldability tihchangtlunna atana thil pawimawh tak a ni.
4. Hman dan tur .
Service neih chhunga welded structure hnathawh temperature, load conditions leh working medium a kawk a ni. Heng hnathawhna hmun leh hnathawh dan tur hian welded structure chu a inmil tur performance a neih a ngai a ni. Entirnan, welded structures te chu temperature hniam taka hnathawk te chuan brittle fracture resistance an neih a ngai a; Temperature sang taka hnathawk structure te hian creep resistance an nei tur a ni a; Alternating load hnuaia hnathawk structure te hian fatigue resistance tha tak an nei a; Acid, alkali emaw salt media emaw hmanga hnathawh Welded container hian corrosion resistance sang tak a nei tur a ni a, a dangte pawh a awm tur a ni. A tawi zawngin, hman dan a harsat poh leh welded joint-te tana quality mamawh a sang a, chu chu a hmanrua te weldability a awm theih lohna tur a ni lo.
