Tuaj kom nkag siab txog kev kub ceev steel
High-speed steel (HSS) yog cov cuab yeej hlau uas muaj siab hardness, siab hnav tsis kam thiab kub kub ua haujlwm, tseem hu ua cua steel lossis pem hauv ntej steel, uas txhais tau hais tias nws tuaj yeem ua kom tawv txawm tias nws txias hauv huab cua thaum quenching, thiab nws ntse heev. Nws tseem hu ua dawb hlau.
High-speed steel yog cov hlau alloy nrog complex muaj pes tsawg leeg, muaj carbide-forming ntsiab xws li tungsten, molybdenum, chromium, vanadium, thiab cobalt. Tag nrho cov ntsiab lus alloying yog li ntawm 10-25 feem pua . Nws tseem muaj peev xwm tswj tau siab hardness nyob rau hauv cov xwm txheej ntawm high kub generated los ntawm high-speed txiav (kwv yees li 500 degree), thiab nws cov HRC tuaj yeem siab tshaj 60. Qhov no yog cov yam ntxwv tseem ceeb tshaj plaws ntawm high-speed steel - liab hardness. Tom qab quenching thiab low-temperature tempering, carbon tool steel muaj siab hardness ntawm chav tsev kub, tab sis thaum kub siab tshaj 200 degree, hardness poob sharply, thiab hardness tau poob mus rau ib theem zoo ib yam li lub xeev annealed ntawm 500. degree. , Ua tiav tsis muaj peev xwm txiav hlau, uas txwv tsis pub siv cov cuab yeej carbon steel rau cov cuab yeej txiav. Lub high-speed steel ua rau tuag tsis txaus ntawm cov cuab yeej carbon steel vim nws qhov zoo liab hardness.
Kev kub ceev steel feem ntau yog siv los tsim cov txheej nyias nyias thiab cov cuab yeej tiv thaiv hlau txiav, nrog rau cov kabmob kub thiab txias extrusion tuag, xws li cov cuab yeej tig, laum khoom, hobs, tshuab pom hniav, thiab xav tau pwm.
02
Tuaj kom nkag siab tungsten steel
Tungsten steel (tungsten carbide) muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam thiab corrosion kuj, tshwj xeeb tshaj yog nws hardness siab thiab hnav tsis kam, txawm nyob rau ntawm qhov kub ntawm 500 degree C. yeej tsis hloov, thiab nws tseem muaj ib tug siab hardness ntawm 1000 degree.
tungsten steel, cov khoom tseem ceeb yog tungsten carbide thiab cobalt, uas suav txog 99 feem pua ntawm tag nrho cov khoom, thiab 1 feem pua yog lwm yam hlau, yog li nws yog hu ua tungsten steel, tseem hu ua cemented carbide, thiab suav tias yog cov hniav niaj hnub. kev lag luam.
Tungsten steel yog cov khoom siv sib xyaw ua ke uas muaj tsawg kawg yog ib qho hlau carbide. tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, thiab tantalum carbide yog cov feem ntau ntawm tungsten steel. Cov nplej loj ntawm cov khoom siv carbide (los yog theem) feem ntau yog nyob nruab nrab ntawm 0.2-10 microns, thiab cov nplej carbide tau tuav ua ke siv cov hlau khi. Binder hlau feem ntau yog hlau pawg hlau, feem ntau siv yog cobalt thiab npib tsib xee. Yog li ntawd, muaj tungsten-cobalt alloys, tungsten-nickel alloys thiab tungsten-titanium-cobalt alloys.
Lub sintering ntawm tungsten hlau yog nias cov hmoov rau hauv ib lub billet, ces sov nws mus rau hauv ib tug sintering rauv rau ib tug tej yam kub thiab txias (sintering kub), khaws cia rau ib tug tej lub sij hawm ntawm lub sij hawm (tuav lub sij hawm), thiab ces txias nws mus kom tau. cov khoom siv tungsten steel nrog cov khoom xav tau.
1) Tungsten-cobalt cemented carbide
Cov khoom tseem ceeb yog tungsten carbide (WC) thiab binder cobalt (Co). Nws qib yog tsim los ntawm "YG" (lub npe ntawm Suav pinyin ntawm "nyuaj, cobalt") thiab feem pua ntawm cov ntsiab lus cobalt nruab nrab. Piv txwv li, YG8 txhais tau hais tias qhov nruab nrab WCo=8 feem pua, thiab tus so yog tungsten-cobalt cemented carbide ntawm tungsten carbide.
2) Tungsten-titanium-cobalt cemented carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide (TiC) thiab cobalt. Nws qib yog tsim los ntawm "YT" (lub npe ntawm Suav pinyin ntawm "nyuaj, titanium") thiab cov ntsiab lus nruab nrab ntawm titanium carbide. Piv txwv li, YT15 txhais tau hais tias qhov nruab nrab TiC =15 feem pua, thiab tus so yog tungsten carbide thiab cobalt-based tungsten-titanium-cobalt cemented carbide.
3) Tungsten-titanium-tantalum (niobium)-raws li cemented carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide, tantalum carbide (los yog niobium carbide) thiab cobalt. Hom cemented carbide no tseem hu ua cov cemented carbide lossis universal cemented carbide. Nws qib yog tsim los ntawm "YW" (lub npe ntawm Suav pinyin ntawm "nyuaj" thiab "wan") ntxiv rau tus lej, xws li YW1.
Tungsten steel muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam thiab corrosion kuj, tshwj xeeb tshaj yog nws siab hardness thiab hnav tsis kam, uas yeej tseem tsis hloov txawm nyob rau hauv kub ntawm 500 degree. Nws tseem muaj siab hardness ntawm 1000 degree. Cemented carbide yog dav siv los ua cov khoom siv, xws li cov cuab yeej tig, milling cutters, drills, tho txawv cov cuab yeej, thiab lwm yam. Qhov kev txiav ceev ntawm cov cemented carbide tshiab yog ntau pua zaus ntawm cov pa roj carbon steel.
