SS Vuam Hlau EC410NiMo

EC410NiMo yog cov hlau-cored lossis khoom vuam hlau ua raws li cov qauv AWS A5.22. Nws cov khoom siv hlau vuam yog kwv yees li 13% Cr, 4% Ni, thiab 0.4-0.5% Mo, koom nrog cov mos martensitic / ferritic stainless hlau system.

Lub vuam hlau no tshwj xeeb tsim los rau vuam thiab kho 13% Cr-4% Ni-Mo cov ntaub ntawv (xws li CA6NM castings). Nws muaj cov ntsiab lus tsis tshua muaj diffusible hydrogen (tsawg dua lossis sib npaug li 4ml / 100g), tiv thaiv kom tsis txhob mob khaub thuas thiab ua kom pom kev tiv thaiv zoo heev rau cavitation yaig, kev nyuaj siab corrosion, thiab cuam tshuam toughness.

Nws feem ntau yog siv nrog GMAW (gas shielded welding) lossis SAW (submerged arc vuam) cov txheej txheem, nrog kev pom zoo shielding gases ntawm 98% Ar + 2%O₂ lossis 96% Ar + 4%O₂. Nws yog haum rau tag nrho cov - txoj hauj lwm welding thiab yog tsuas yog siv nyob rau hauv kev tsim thiab kho cov khoom tseem ceeb ntawm hydroelectric zog tsim khoom xws li turbine blades thiab khiav.

Cov yam ntxwv tseem ceeb

• Muaj pes tsawg leeg: Kwv yees li 13% Cr, 4% Ni, thiab 0.4% Mo. Cov ntsiab lus qis carbon ua kom lub zog thiab tawg tsis kam ntawm cov hlau vuam.
• Hardness: Raws li -welded hardness yog kwv yees li 35-42 HRC, kho tau tom qab kev kho cua sov.
• Txheej Txheem: Haum rau GMAW (Gas Shielded Vuam) thiab SAW (Submerged Arc Vuam). Yuav tau welded nyob rau hauv txhua txoj hauj lwm. Pom zoo shielding gas yog 98% Ar + 2% O₂ lossis 96% Ar + 4% O₂.
• Crack Resistance: Tsis tshua muaj diffusible hydrogen cov ntsiab lus (Tsawg tshaj los yog sib npaug rau 4ml / 100g), zoo tiv thaiv txias cracking.

Tej kev siv

Cov khoom siv hluav taws xob xws li turbine khiav thiab cov hniav (Pelton, Francis, Kaplan turbines).

Cov khoom uas yuav tsum tau muaj kev tiv thaiv corrosion, cavitation tsis kam, thiab hnav tsis kam, xws li compressors, li qub, thiab lub cev twj tso kua mis.

Vuam Cov Lus Qhia

• Preheating kub: Feem ntau 100-150℃(txog 300℃rau thicker qhov chaw).
• Interpass kub: Khaws hauv qab 170℃kom tsis txhob overheating.
• Tom qab-weld kev kho cua sov: Annealing ntawm 580-620℃yog pom zoo los txhim kho toughness thiab txo cov seem seem.

Cov duab khoom

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