Lefapheng la tlhahiso ea liphaephe, ho hlokahala hore ho lateloe maemo le litlhaloso tse fapaneng ho netefatsa boleng le polokeho ea sehlahisoa sa ho qetela.ASTM A139ke e 'ngoe ea maemo a joalo a phethang karolo ea bohlokoa tlhahisong ea liphaephe tsa tšepe bakeng sa lits'ebetso tse fapaneng.
ASTM A139 ke tlhaloso e tloaelehileng bakeng sa phaephe ea tšepe e kopantsoeng ka motlakase (arc) (NPS 4 le ho feta). E akaretsa litlhoko tsa phaephe ea tšepe e kopantsoeng ka motlakase (arc) e kopantsoeng ka spiral seam, lebota le lesesaane, phaephe ea tšepe ea austenitic bakeng sa lits'ebetso tse senyang kapa tsa mocheso o phahameng. Tekanyetso ena e hlalosa litlhoko tsa thepa, lits'ebetso tsa tlhahiso, litekanyo le thepa ea mechini ea liphaephe tsa tšepe.
Litlhoko tsa thepa tsa ASTM A139 li totobatsa mefuta le maemo a tšepe a ka sebelisoang ho etsa liphaephe. Sena se kenyelletsa metsoako ea lik'hemik'hale ea tšepe, e lokelang ho ba le liperesente tse itseng tsa likarolo tse kang khabone, manganese, phosphorus, sebabole le silicon. Litlhoko tsena li bohlokoa ho netefatsa hore tšepe e sebelisoang holiphaephee fihlela maemo a hlokahalang a matla le ho hanyetsa ho bola.
Ts'ebetso ea tlhahiso ea phaephe ea ASTM A139 e kenyelletsa ho tjheseletsa ka motlakase (arc), e sebelisang arc ea motlakase ho hlahisa mocheso o hlokahalang ho tjheseletsa likhoele tsa tšepe hore li be sebopeho sa cylindrical. Ts'ebetso ena e laoloa ka hloko ho netefatsa hore li-weld li boleng bo holimo ebile ha li na liphoso. Tekanyetso e boetse e totobatsa mekhoa ea tlhahlobo bakeng sa li-weld, joalo ka tlhahlobo ea ultrasonic le tlhahlobo ea kobeho e tataisoang ka tsela e potolohang, ho netefatsa hore li fihlela maemo a boleng a hlokahalang.
Mabapi le litekanyo, ASTM A139 e hlalosa litlhoko tsa boholo ba phaephe, botenya ba lebota le bolelele. Sena se kenyelletsa mamello e itseng litekanyong ho netefatsa hore phaephe e fihlela litlhaloso tse hlokahalang bakeng sa ts'ebeliso ea eona e reriloeng. Litlhoko tsena tsa litekanyo li bohlokoa ho netefatsa hore liphaephe li kentsoe le ho hokahanngoa ka nepo lits'ebetsong tse fapaneng.
Litšobotsi tsa mechine tse kang matla a ho thapolla, matla a ho ntša peo, le ho lelefala le tsona li boletsoe ho ASTM A139. Litšobotsi tsena li bohlokoa ho khetholleng matla le ts'ebetso ea phaephe tlas'a maemo a fapaneng a ts'ebetso. Tekanyetso e beha litlhoko tse fokolang bakeng sa litšobotsi tsena tsa mechini ho netefatsa hore phaephe e khona ho mamella khatello e lebelletsoeng, mocheso le maemo a tikoloho.
Ka kakaretso, ASTM A139 e bapala karolo ea bohlokoa tlhahisong ealiphaephe tsa tšepebakeng sa lits'ebetso tse fapaneng. Ka ho totobatsa thepa, lits'ebetso tsa tlhahiso, litekanyo le thepa ea mechini ea liphaephe, tekanyetso e netefatsa hore sehlahisoa sa ho qetela se fihlela litekanyetso tse hlokahalang tsa boleng le polokeho. E fa bahlahisi, baenjiniere le basebelisi ba ho qetela kholiseho ea hore phaephe e tla sebetsa kamoo ho neng ho lebelletsoe ts'ebelisong ea eona e reriloeng.
Ka bokhutšoanyane, ho utloisisa bohlokoa ba ASTM A139 tlhahisong ea liphaephe ho bohlokoa ho netefatsa boleng le polokeho ea lihlahisoa tsa liphaephe tsa tšepe. Tekanyetso e beha litlhoko tse hlokahalang bakeng sa thepa, lits'ebetso tsa tlhahiso, litekanyo le thepa ea mechini ho netefatsa hore liphaephe li fihlela maemo a boleng le ts'ebetso a hlokahalang. Ka ho khomarela ASTM A139, bahlahisi ba ka hlahisa liphaephe tsa tšepe tsa boleng bo holimo tse fihlelang litlhoko tsa liindasteri le lits'ebetso tse fapaneng.
Nako ea poso: Tshitwe-28-2023