1. Dab tsi yog cov tseem ceeb khoom siv ntawm Astm 519 8625 steel yeeb nkab?
Teb:
ATM A UK 519 8625 Yog lub siab- chromium- molybdenum alloy steel nrog cov yam ntxwv tsim qauv no:
Cov ntsiab lus carbon (0.23-0.28%) yog qhov siab dua ntawd ntawm 8620}}}}, muab ntau dua matrix lub zog.
Lub alyoy ua ke (0.40- 0.70% npib tsib -0.30% molybdenum) txuas ntxiv ua kom zoo dua qub thiab kub-kub ruaj khov.
Cov ntsiab lus tseem ceeb: Hauv lub xeev quenched thiab tempered, nws tuaj yeem ua rau muaj kev cuam tshuam nyuaj rau ultra-siab loads thiab muaj ib puag ncig tsawg-kub.
2. Dab tsi yog qhov kev kho cua sov raug tsim kho rau 8625 steel yeeb nkab? Teb:
Quenching thiab tempering (cov txheej txheem tseem ceeb):
850-880 ° C roj quenching {1} ° C tempering kom ua tiav qhov kev nyuaj siab ntawm HRC 32-38;
Tensile lub zog tuaj yeem ncav cuag 1100 MPa, nrog txoj kev elongation ≥10%.
Deg muaj zog (qhov tshwj xeeb xav tau):
Ion Nitriding (500 ° CE) Yuav ua tiav qhov kev nyuaj ntawm HV 900-1100, nce hnav tsis kam los ntawm ntau dua peb zaug;
Qhov no hloov tsoos carburizing, zam kev pheej hmoo ntawm brittleness hauv high- cov hlau hlau tom qab carburizing.
Xaiv cov txheej txheem: Qhov yuav tsum tau sib npaug lub zog yuav tsum tau ua (piv txwv li, rau kev tsuas yuav tsum muaj (piv txwv li, rau cov roj drilling cov cuab yeej).
3. Dab tsi yog cov ntawv thov tseem ceeb rau 8625 steel yeeb nkab? Teb:
Zog rho tawm: SHOOV ROJ TEJ LUB TAUB HAU (muaj kev kub siab kuj thiab corrosion qaug zog tsis kam), tob {} Lub hiav txwv tho diam;
Cov cuab yeej hnyav: Thoob cov log excavator lub ntsiab ntse candts (withstands lwm txoj kev sib txawv ntawm cov pob txha pob qij txha universal;
Cov tsheb tshwj xeeb: Cov tsheb sib tsoo tshem tawm ntawm caj npab (cuam tshuam kuj thiab cov teeb tsim khaub ncaws);
Moulding: Kev ua haujlwm kub loj pwm ntxig (hloov H13 hloov H13, nce lub neej pabcuam los ntawm 20%).
4. Qhov kev ua tau zoo ntawm8625}}}}}}} Piv rau cov ntaub ntawv zoo sib xws (xws li8630 thiab 4340)?
Teb:
vs . 8630:
8625 Muaj cov ntsiab lus muaj roj carbon ntau dua, thiab nws lub zog ntxiv los ntawm kwv yees li 10% tom qab kev kub ntxhov, tab sis nws lub zog qis dua yog qhov yuav tsum tau);
{{08630 yog qhov haum ntau rau welded txheej txheem ntu (xws li kev siv tshuab siv tshuab). Piv rau 4340:
4340 muaj qhov tseem ceeb dua npib tsib xee cov ntsiab lus (1.65- 2.00%) thiab zoo dua-kub kev nruj (-50 ° C);
{{08625 yog 15 -} {% tsis muaj nqi thiab haum rau cov cua tshuab hluav taws xob (xws li cua tshuab hluav taws xob tseem ceeb).
5. Dab tsi yog qhov kev txiav txim siab tseem ceeb rau kev ua thiab yuav 8625 steel yeeb nkab?
Teb:
Tswjhwm Zoo:
Tus neeg muab ntawv pov thawj yuav tsum muab cov ntawv pov thawj dua los ntawm A519 thiab Ams 2759/7 (Aerospace Kev Kho Cua Kub Kev Kho Mob);
Qhov tseem ceeb soj ntsuam suav nrog tsis - nws yog hom phiaj txheem (chav kawm ≤ Qib 1.5) thiab lis loj (≥ qib 5).
Siv Tshuab:
Kev nyuaj siab pab txhawb kev pab txhawb (600 ° C x 4H) yog yuav tsum tom qab siv cov tshuab ntxhib los tiv thaiv deformation thaum ua tiav.
Ceramic -} coated txiav cov cuab yeej (txiav ceev 120}}}}}}) nrog cov kev cog lus siab tau pom zoo. Vuam Specifications:
Preheat rau 250-300 ° C, siv AWS A5.5 E12018-M Vuam consumables, thiab kev ntxhov siab ntawm 620 ° C rau 4 teev tom qab vuam.
Tsis txhob ua loj - nplai overlay vuam tsis muaj cua sov kho.
Muab cov khoom siv txuas ntxiv: ua ntej cov hlau ua ntej nrog lub tshuab nqus tsev (VOD / VOD) muaj peev xwm, ua kom cov ncauj lus sulphur thiab phosphorus cov ntsiab lus ≤ 0.015%.
