Cov yam ntxwv ntawm K9 Ductile Iron Pipes

Ductile hlau ua tiav cov duab kheej kheej graphite faib los ntawm kev kho spheroidization, txhim kho cov khoom siv zog. Nws lub zog tensile thiab compressive nyob deb tshaj qhov zoo tib yam cam khwb cia hlau kav, nrog lub zog tensile tshaj 420 MPa thiab muaj peev xwm tiv taus siab ua hauj lwm siab tshaj 1.6 MPa. Cov yam ntxwv no tso cai rau cov kav dej kom tsis txhob muaj kev cuam tshuam nrog dej siab, av siab, thiab kev thauj mus los. Txawm nyob rau hauv complex geological tej yam kev mob nrog sib sib zog nqus faus, lawv tswj cov txheej txheem stability, zoo txo ​​qhov kev pheej hmoo ntawm deformation los yog rupture los xyuas kom meej ntev -lub sij hawm kev ruaj ntseg system.

Lub spheroidal graphite qauv endows cov yeeb nkab nrog tshwj xeeb ductility thiab cuam tshuam tsis kam, absorbing sab nraud zog thiab dispersing kev nyuaj siab los tiv thaiv brittle puas. Tsis tas li ntawd, cov yeeb nkab nta lub qhov (socket) - hom kev sib koom ua ke hloov tau yooj yim uas haum rau kev hloov pauv thiab deformation tshwm sim los ntawm lub hauv paus kev sib haum xeeb thiab kev hloov ntawm ib puag ncig kub, tswj kev ncaj ncees ntawm cov kav dej. Qhov kev ua tau zoo no ua rau K9 cov kav dej ua haujlwm tau ntseeg tau hauv qhov chaw hnyav thaum txo qis kev saib xyuas.

Kev tiv thaiv kev tiv thaiv zoo tshaj - kev ntsuas corrosion yog siv rau ob lub yeeb nkab sab hauv thiab sab nrauv: Sab hauv cov cement mortar hauv ob sab phlu (ib txwm cement / siab-alumina cement) cais tawm cov kua dej corrosion thiab tiv thaiv cov nplai tsim, haum rau acids, alkalis, brine, thiab lwm yam xov xwm. Thaum cov phab ntsa sab nrauv nta kev tiv thaiv dual los ntawm zinc txau txheej thiab asphalt xim txheej, tiv thaiv electrochemical corrosion los ntawm av thiab dej hauv av. K9-qib ductile hlau kav ua raws li cov qauv hauv lub tebchaws muaj kev pabcuam lub neej ntev tshaj 50 xyoo, txo cov nqi hloov pauv thiab ua tiav qhov sib npaug ntawm kev lag luam thiab kev ntseeg siab.