Kev txhim kho keeb kwm ntawm Nickel-based Cast Superalloys
1.Lub teb ntawm high-temperature alloys suav nrog cov nickel-based casting superalloy, uas muaj cov txiaj ntsig tshwj xeeb hauv kev tsim ntau yam precision castings. Cov khoom siv muaj zog tiv taus kub, oxidation, thiab corrosion yog qhov tseem ceeb.
2.Early superalloys raws li nickel feem ntau wrought alloys. Cov kev xav tau rau qhov kub thiab txias muaj peev xwm ntawm lub cav turbine Cheebtsam tau nce raws li aero-engine technology tau nce siab nyob rau xyoo 1950s, uas tau ua tiav cov kev cai rau lub zog thiab kev pabcuam kub ntawm superalloys. cov qauv siab dua. Nce alloying degree, uas ua rau nws nyuaj los yog tsis yooj yim sua rau npib tsib xee-raws li high-temperature alloys deform, yog tib txoj kev uas yuav ua rau kom lub zog ntawm cov alloys. Cov txheej txheem Casting yog tib txoj kev los tsim cov hlau no. Tsis tas li ntawd, cov cua txias nrog cov hollow cua zaj duab xis qhov tau pib tshwm sim nrog kev nce qib ntawm lub cav hniav tsim tshuab. Tsuas yog cov peev txheej casting tuaj yeem tsim cov hniav hollow nrog cov txheej txheem nyuaj sab hauv.Ib tus naj npawb ntawm cov nickel-based casting high-temperature alloy qib nrog cov txiaj ntsig zoo kub kub tau maj mam tsim ob qho tib si hauv teb chaws thiab thoob ntiaj teb hauv kev teb rau qhov xav tau no.
3.Nyob rau hauv lub xyoo 1940, lub UK tau tsim thawj cov ntaub ntawv nickel-based superalloy, thiab lawv siv nyob rau hauv dav hlau aviation ua rau ntau tus neeg tsim khoom kom paub txog qhov tseem ceeb ntawm cov khoom siv alloy. Nimonic75 (Ni-20Cr-0.4Ti), ib qho hlau nplaum raws li npib tsib xee, tau tsim nyob rau hauv tebchaws United Kingdom xyoo 1941. Tom qab lub sijhawm ntev ntawm kev loj hlob, cov teb chaws tsim kho xws li Tebchaws Meskas thiab Soviet. Union kuj tau ua tiav hauv kev tsim cov ntaub ntawv alloy nrog cov khoom sib piv, thaum Tuam Tshoj tau ua li ntawd hauv xyoo 1950.
4.Nws tsis yooj yim los txiav txim siab tias muaj ob txoj hauv kev tshawb fawb los ntawm kev saib cov keeb kwm kev loj hlob ntawm nickel-based cam khwb cia superalloys:
Ib qho yog hloov thiab muab cov khoom sib xyaw ua ke thaum kawm txog cov teebmeem ntawm ntau lub ntsiab lus sib ntxiv ntawm cov yam ntxwv ntawm cov alloy kom txog rau qhov zoo tagnrho cov khoom thiab muaj pes tsawg leeg;
Qhov thib ob yog los txhim kho cov txheej txheem tsim khoom thiab cov khoom siv ntawm cov nickel-based cam khwb cia superalloy txhawm rau txhim kho thiab txhim kho cov txheej txheem kev npaj alloy.
5.Piv txwv li, los ntawm kev tshawb nrhiav kev sim siab, cov kws tshawb fawb tau tsim ib txoj kev nqus smelting thaum ntxov xyoo 1950. Kev tsim kho thiab kev nce qib ntawm cov txheej txheem txheej txheem no tau muab kev lees paub thev naus laus zis rau kev tsim cov superalloys raws li npib tsib xee;
Nyob rau xyoo 1960, cov teb chaws tsim tau npaj cov peev txheej casting los ntawm kev tshawb fawb thiab tsim ib tug loj tus naj npawb ntawm casting alloys nrog zoo high-temperature zog. Nyob rau hauv lub xyoo tom ntej no, ib co siv lead ua cam khwb cia superalloys nrog zoo siab kub kev kawm tau tsim successively. Nrog rau txoj kev loj hlob ntawm aerospace engine technology, muaj ntau dua yuav tsum tau rau nickel-based cam khwb cia superalloys. Yog li ntawd, nyob rau hauv ntau tshaj 40 xyoo los ntawm thaum ntxov 1950s mus rau lub lig 1990s, nrog rau kev txhim kho txuas ntxiv ntawm kev tshawb fawb thiab kev loj hlob muaj peev xwm, kev ua tau zoo thiab kev pab cuam kub ntawm npib tsib xee-based casting superalloys tau nce siab thiab siab dua, thiab lawv daim ntawv thov teb tau dhau los ua. dav dua thiab dav dua.