Kodi hardfacing ndi chiyani

Hardfacing ndi kuyika kwa zokutira zolimba, zolimba, zosagwira ntchito pamalo owonongeka kapena atsopano omwe amatha kuvala.ndi kuwotcherera, kupopera mbewu mankhwalawa ndi matenthedwe, kapena njira yofananira. Kupopera mbewu kwa matenthedwe, kupopera mbewu mankhwalawa ndi njira zowotcherera nthawi zambiri kumagwiritsidwa ntchito popaka wosanjikiza wolimba. Zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala ndi ma aloyi opangidwa ndi cobalt (monga tungsten carbide), ma aloyi opangidwa ndi nickel,chromium carbidealoyi, ndi zina. Kukhazikika kolimba nthawi zina kumatsatiridwa ndi kupondaponda kotentha kuti mukonzenso gawolo kapena kuwonjezera mtundu kapena chidziwitso pagawolo. Zojambulajambula kapena mafilimu angagwiritsidwe ntchito poyang'ana zitsulo kapena chitetezo china

Kupopera mbewu kwa matenthedwe kumayamikiridwa ndi ntchito zomwe zimafuna kupotoza pang'ono kwa chigawocho ndikuwongolera njira yabwino. Zipangizo zolimba zokhazikika zomwe zimayikidwa ndi kupopera mbewu mankhwalawa ndi ma cermets monga WC-Co ndi zitsulo zopangidwa ndi aluminiyamu. Zopaka izi zimagwiritsidwa ntchito pa makulidwe pafupifupi 0.3mm.

Zovala zopopera zopoperanso zomwe zimatchedwanso zokutira zodzigudubuza zokha, zimayamba kugwiritsidwa ntchito pamwamba pa chigawocho pogwiritsa ntchito kupopera mbewu kwa lawi lamoto kenako nkuphatikizana pogwiritsa ntchito tochi ya oxyacetylene kapena coil yolumikizira ya RF. Chophimba chosakanikirana chimanyowetsa gawo lapansi kuti lipange zokutira zomwe zimamangiriridwa ndi zitsulo ku gawo lapansi ndipo sizikhala ndi porosity. Pali mitundu yosiyanasiyana ya aloyi yomwe imagwiritsidwa ntchito ndi njira yopopera-fuse, yofunika kwambiri imachokera ku Ni-Cr-B-Si-C alloy system. Kutengera kapangidwe kawo, amasungunuka mumitundu ya 980 mpaka 1200 ° C. 

Weld hard faced amagwiritsidwa ntchito kuyika zigawo zokhuthala kwambiri (1 mpaka 10mm) za zinthu zosavala zokhala ndi mphamvu zambiri zomangira. Njira zingapo zowotcherera zitha kugwiritsidwa ntchito, kuphatikiza gasi wachitsulo-inert (MIG), inert ya tungstengasi (TIG), plasma transferred arc (PTA), submerged arc (SAW), ndi manual metal arc (MMA). Mitundu yotakata kwambiri ya zida zokutira zitha kugwiritsidwa ntchito. Zimaphatikizapo ma aloyi opangidwa ndi cobalt (tungsten carbide etc.), zitsulo za martensitic ndi zothamanga kwambiri, ma aloyi a faifi tambala ndi ma carbides omangidwa ndi WC-Co. Pambuyo kuyika ndi njira iliyonse yomwe ili pamwambapa, ndikofunikira kumaliza gawoli pamwamba.

Hardfacing akhoza kuikidwa m'njira zosiyanasiyana kuwotcherera:

·Kuwotcherera zitsulo zotetezedwa

·Kuwotcherera kwachitsulo kwachitsulo, kuphatikiza zonse zotetezedwa ndi gasi komanso kuwotcherera kwa arc

·Oxyfuel kuwotcherera

·Kumizidwa m'madzikuwotcherera arc

·Electroslag kuwotcherera

·Plasma anasamutsa arc kuwotcherera, wotchedwanso kuwotcherera kwa plasma wa ufa

·Kupopera mbewu kwa matenthedwe

·Cold polima mankhwala

·Kupaka laser

·Hardpoint