Extruded bar yog qhov chaw pib rau feem ntau cov khoom siv tooj dag. Txoj kev extrusion txiav txim siab nplej ntws, ncaj thiab nto zoo, thiab qhov kawg txias tiav dhau txiav txim siab npau taws; to taub ua ke, lawv piav qhia vim li cas C28000 tooj dag extruded bar tshuab kom huv si, tiv thaiv cov kev pabcuam ntub dej thiab tseem lees txais xov thiab lub teeb sib sau.
Txoj Kev Extrusion rau C28000 Bar
C28000 yog 60/40 tooj liab-zinc alloy uas muaj ob theem alpha thiab beta. Cov theem beta yog ductile ntawm qhov kub siab, uas yog raws nraim li cas ua rau cov hlau extrudable: billets yog rhuab mus rau hauv ib tug ntau yam uas cov qauv deforms smoothly, feem ntau ntawm 650℃thiab 780 degree, thiab raug thawb los ntawm ib tug tuag los tsim lub bar profile. Extrusion yog ua raws li kev tswj kom txias, ncaj thiab, qhov twg yuav tsum tau npau taws, kos duab txias lossis txias tiav.
Vim tias cov hlau hla dhau los ntawm theem kub, lub extruded bar tau zoo, axially aligned grain flow. Qhov kev khiav yog vim li cas extruded thiab kos bar yog nyiam dua machined -los ntawm - phaj Tshuag rau cov khoom ntim hauv nro, xws li valve stems thiab threaded rods.
Composition Control thiab qib sib npaug
Lub qhov rais muaj pes tsawg leeg rau UNS qib yog kho los ntawm ASTM cov qauv rau cov khoom daim ntawv: tooj liab 59.0 - 63.0%, zinc raws li qhov sib npaug, nrog txhuas, hlau thiab lwm yam impurities tuav rau qhov seem seem ntawm cov qauv siv tau. Cov neeg yuav khoom ua haujlwm rau Suav lossis Nyij Pooj kos duab feem ntau ntsib tib lub alloy raws li lwm cov qauv, thiab cov ntawv sau tau sau tseg hauv qab no.
| Qhov system | Lub npe | Cov ntsiab lus tooj liab |
|---|---|---|
| UNS | C28000 (Muntz hlau) | 59.0 – 63.0 % |
| Tuam Tshoj, kos bar | H62, GB/T 4423 | 60.5 – 63.5 % |
| Nyiv, pas nrig thiab bar | C2800, JIS H3250 | 59.0 – 63.0 % |
| Lub npe qub European | CuZn 40 | txog 60% nominal |
Peb qhov tshwj xeeb piav qhia tib tsev neeg ntawm 60/40 tooj dag, nrog qhov sib txawv me me ntawm cov tooj liab thiab hauv cov khoom seem tswj. Thaum daim duab qhia txog qib Suav thiab daim ntawv pov thawj xa tawm hais txog UNS sib npaug, cov tooj liab ntau ntawm qib xaj ib txwm tswj hwm.
Mechanical Performance los ntawm Temper
Extruded thiab kos bar yog txiav txim siab los ntawm kev npau taws raws li ASTM B601 tus qauv tsim, thiab tus txheej txheem tswj hwm hais txog qhov tsawg kawg nkaus tensile lub zog thiab qhov tsawg kawg nkaus elongation rau txhua txoj kab npau taws. Cov qauv kev ua tau zoo uas tus tsim qauv ua haujlwm nrog yog sib xws:
| Qhov xwm txheej | Lub zog | Ductility | Hom kev siv |
|---|---|---|---|
| Kub extruded, annealed | qis | Siab tshaj | Heavy machining, dabtsi yog khoov, sib sau |
| Teeb kos | Nruab nrab | Zoo | General machined qhov chaw |
| Nyuaj kos | Siab dua | Nruab nrab | Threaded studs, spacers |
| Ntxiv nyuaj | Siab tshaj | Txwv tsis pub | Hnav cov khoom, tawv fittings |
Kev lees txais qhov tseem ceeb yuav tsum tau coj los ntawm cov kab npauj npaim xaj; cov lus qhia saum toj no piav qhia txog tus cwj pwm txheeb ze thiab tsis yog qhov hloov pauv rau tus qauv.
Lub cev, Machining thiab Finishing Cwj Pwm
Lub cev tsis tu ncua:density 8.39 g / cm³, melting ntau li ntawm 900 - 940 degree, hluav taws xob conductivity txog 28% IACS nyob rau hauv annealed mob, thermal conductivity txog 120 W / (m·K), modulus elasticity txog 103 GPa.
Machining:lub beta theem lov chips luv luv, yog li cov cav tov alloy zoo nrog zoo rake tooling, ntse npoo thiab dej nyab coolant; cov cuab yeej hnav yog nruab nrab thiab qhov chaw tiav yog zoo ib yam ntawm cov tshuab dhos tsis siv neeg.
Ua haujlwm txias:lub alloy ua hauj lwm hardens sai heev, yog li txias forming yog txwv rau dabtsi yog khoov, coining thiab lub teeb teeb duab, nrog annealing ntawm kev khiav hauj lwm thaum txo accumulates.
Koom nrog:soldering thiab brazing yog ncaj nraim; fusion vuam xav tau kev tswj cov cua sov kom txo cov zinc poob.
Nto finishing:bar tuaj yeem polished, lacquered, tinned los yog plated tom qab tus qauv tu, thiab cov xim ci feem ntau sab laug tawm ntawm qhov chaw zoo nkauj.
Cov ntsiab lus tshuaj xyuas uas txiav txim siab txais
Daim ntawv pov thawj ntawm kev tsom xam uas qhia txog tooj liab, zinc thiab cov khoom seem nyob hauv qhov txwv ntawm qib xaj.
Tensile xeem qhov tshwm sim thiab elongation matched rau temper kab uas tau txiav txim.
Txoj kab uas hla, ovality, ncaj thiab ntev ntsuas tawm tsam qhov pom zoo tolerances.
Surface condition checked extrusion marks, laps, seams thiab tuav puas.
Grain flow thiab internal soundness soj ntsuam qhov twg ib feem yuav hnyav loaded los yog machined nrog sib sib zog nqus txiav.
FAQ
Q: Vim li cas thiaj siv extruded bar es tsis txhob cam khwb cia?
Extrusion consolidates cov hlau thiab tsim nruam axial grain flow, muab lub zog zoo dua thiab zoo ib yam machining ntau dua li cov qauv cam khwb cia.
Q: Cov ntsiab lus tooj liab ntawm C28000 extruded bar yog dab tsi?
Qib UNS tau teev tseg ntawm 59.0 - 63.0% tooj liab nrog zinc raws li qhov sib npaug; Suav H62 qib GB / T 4423 yog teev ntawm 60.5 - 63.5% tooj liab.
Q: Can extruded C28000 bar yuav txias tsim tom qab xa khoom?
Lub teeb bending thiab coining yog cov tswv yim, tab sis cov alloy ua hauj lwm hardens sai heev, yog li hnyav forming yuav tsum tau ib tug annealing lag luam.
Q: Dab tsi temper yog qhov zoo tshaj plaws rau kev siv lub tshuab tsis siv neeg?
Ib qho yooj yim kos lossis annealed mob muab qhov zoo tshaj plaws ua ke ntawm nti tsim thiab lub neej cuab yeej; qhov tseeb temper tau lees paub tawm tsam tus qauv rau kab xaj.
Q: Bar straightness tswj li cas?
Los ntawm straightening tom qab extrusion thiab kos duab, tom qab ntawd tshuaj xyuas tiv thaiv qhov ncaj siab kam rau ua pom zoo ntawm qhov kev txiav txim.
Q: Puas yog extruded C28000 bar haum rau kev pabcuam ntub dej?
Yog lawm. Cov alloy tiv taus dej tshiab, huab cua hauv hiav txwv thiab ntsev tsuag zoo, nrog rau cov dej chemistry tshuaj xyuas qhov twg cov chlorides tas li.
