Tuaj thiab kawm txog hss
High-ceev steel (hss) yog lub cuab tam hlau nrog lub hardness siab, tseem muaj lub zog kub, tseem muaj cua sov txawm tias thaum cua txias thiab txias. Nws tseem hu ua hlau dawb.
Kev kub ceev cov hlau yog ib qho kev sib xyaw ua ke hlau nrog cov khoom siv carbide uas muaj carbide sib sau xws li tungsten, Molybdenum, chromium, vanadium thiab cobalt. Tag nrho cov nyiaj ntawm alloying ntsiab mus txog 10 txog 25%. Nws tuaj yeem tswj lub siab tawv nyob rau hauv high cua sov (txog 500 ℃) hauv kev kub siab ceev, hrc tuaj yeem yog tus yam ntxwv hss tseem ceeb tshaj plaws - liab hardness. Thiab carbon Tool steel los ntawm quenching thiab tsawg kub npau taws, tab sis thaum muaj qhov hnyav dua 200 ℃, lub hardness yuav poob loj heev, hauv 500 ℃ hardness tau poob mus rau ib qho kev sib npaug nrog Annealed xeev, ua kom ploj kiag lub peev xwm txiav hlau, uas txwv cov roj carbon Tool txiav cov cuab yeej. Thiab cov hlau ceev nrawm vim yog xim liab zoo, kom ua rau cov neeg tuag tsis zoo ntawm cov roj carbon tuam.
High-ceev siv los tsim cov complex Thin-edged thiab kev zam cov cuab yeej, khiav, hobs, tshuab pom hniav thiab xav tau tuag.
Los thiab kawm txog tungsten steel
Tungsten steel (carbide) muaj cov khoom muaj ntau yam zoo li nws lub zog ua kom zoo, thiab cov kev ua kom zoo dua qub, kub ua rau muaj kev hloov pauv txawm nyob rau ntawm qhov kub ntawm 500 ℃, Thiab tseem muaj lub hardness siab ntawm 1000 ℃.
Tungsten steel, uas cov khoom tseem ceeb yog tungsten carbide thiab cob qhia rau 99% ntawm lwm cov hlau, yog li nws yog suav hais tias yog cov hniav ntawm kev lag luam niaj hnub.
Tungsten steel yog sintered composite cov khoom siv uas muaj tsawg kawg ib hlau carbide muaj pes tsawg leeg. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, thiab tantalum carbide yog cov khoom siv ntawm tungsten steel. Cov noob nplej loj ntawm lub carbide tivthaiv (lossis theem) feem ntau nyob rau hauv thaj tsam 0.2-10 micbide, thiab carbide nplej yog sib raug zoo siv cov ntawv hlau. Txoj kev sib tsoo hlau feem ntau yog cov pab pawg hlau feem ntau yog cov hlua khi thiab nickel feem ntau. Yog li muaj tungsten-cobalal alloys, Tungsten-Nickel alloys thiab Tungsten-Cobaltic alloys.
Tungsten Sinter Txoj Kev yog kom nias cov hmoov rau hauv ib lub sijhawm, tom qab ntawd ua rau muaj qee lub sijhawm (Sinining ntsuas kub), thiab tom qab ntawd txias nws kom tau txais tungsten steel cov khoom siv nrog cov khoom uas xav tau.
①tungsten thiab cobalt cemaled carbide
Lub ntsiab tivthaiv yog tungsten carbide (WC) thiab Binder Cobalt (CO). Cov qib yog tsim ntawm "YG" ("nyuaj, cobalt" hauv Hanyu pinyin) thiab qhov feem pua ntawm cov ntsiab lus nruab nrab ntawm cov ntsiab lus nruab nrab. Piv txwv li, yg8, uas txhais tau tias yog WCO = 8% thiab tus so yog tungsten carbide cemented carbide.
②tungsten, Titanium thiab cob haum rau carbide
Lub Cheebtsam tseem ceeb yog tungsten carbide, titanium carbide (TIC) thiab cobalt. Cov qib yog tsim ntawm "YT" ("nyuaj, Titanium" hauv Hanyu Pinyin) thiab cov ntsiab lus nruab nrab ntawm titanium carbide. Piv txwv li, yt15, txhais tau tias qhov nruab nrab Tic = 15%, tus so yog tungsten carbide thiab cobalt cov ntsiab lus ntawm tungsten carbide.
③tungsten-titanium-tantalum (niobium) carbide
Lub hauv paus tseem ceeb yog tungsten carbide, titanium carbide, tantalum carbide (lossis niobium carbide) thiab cobalt. Hom carbide no tseem hu ua cov carbide-hom phiaj carbide lossis Universal carbide. Cov qib muaj "YW" ("nyuaj" thiab "lab" hauv Hanyu Pinyin) ntxiv rau tus lej, xws li YW1.
Tungsten steel muaj cov yam ntxwv zoo heev xws li hnav tsis muaj zog, thiab cov cua sov tseem tsis tau hloov pauv txawm tias muaj qhov kub ntawm 500 ℃, thiab tseem muaj siab tawv thaum 1000 ℃. Cemented carbide yog dav siv raws li cov ntaub ntawv, xws li tig cov cuab yeej, tho, tho, tho kev nrawm yog sib npaug rau ntau pua ntawm cov hlau.
Lub Sijhawm Post: Feb-21-2023
