Los thiab kawm txog HSS
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 hlau lossis hlau ntse, txhais tau hais tias nws hardens txawm tias txias hauv huab cua thaum quenching thiab ntse. Nws tseem hu ua dawb hlau.
Kev kub ceev steel yog cov hlau alloy nrog cov txheej txheem nyuaj uas muaj cov carbide tsim cov ntsiab lus xws li tungsten, molybdenum, chromium, vanadium thiab cobalt. Tag nrho cov ntsiab lus ntawm alloying nce mus txog 10 mus rau 25%. Nws muaj peev xwm tswj tau siab hardness nyob rau hauv high kub (kwv yees li 500 ℃) nyob rau hauv kev kub ceev txiav, HRC tuaj yeem siab tshaj 60. Qhov no yog qhov tseem ceeb tshaj plaws yam ntxwv ntawm HSS - liab hardness. Thiab cov cuab yeej carbon steel los ntawm quenching thiab tsis kub tempering, nyob rau hauv chav tsev kub, txawm hais tias muaj ib tug heev hardness, tab sis thaum kub siab tshaj 200 ℃, lub hardness yuav poob sharply, nyob rau hauv 500 ℃ hardness tau poob mus rau ib tug zoo xws li cov degree. lub xeev annealed, kiag li poob peev xwm txiav hlau, uas txwv tsis pub cov cuab yeej carbon steel txiav cov cuab yeej. Thiab high-ceev steel vim zoo liab hardness, yuav ua rau tuag shortcomings ntawm carbon cuab tam steel.
Kev kub ceev steel feem ntau yog siv los tsim cov txheej txheem nyias-edged thiab cuam tshuam-resistant hlau txiav cov cuab yeej, tab sis kuj los tsim cov kub kub thiab txias extrusion tuag, xws li tig cov cuab yeej, xyaum, hobs, tshuab pom hniav thiab xav tau tuag.
Tuaj thiab kawm txog tungsten steel
Tungsten steel (carbide) muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam, corrosion kuj, thiab lwm yam. Tshwj xeeb tshaj yog nws cov hardness siab thiab hnav kuj tseem nyob twj ywm tsis hloov txawm nyob rau ntawm qhov kub ntawm 500 ℃, thiab tseem muaj siab hardness ntawm 1000 ℃.
tungsten steel, uas nws cov khoom tseem ceeb yog tungsten carbide thiab cobalt, suav txog 99% ntawm tag nrho cov khoom thiab 1% ntawm lwm cov hlau, yog li nws yog hu ua tungsten steel, tseem hu ua cemented carbide, thiab suav tias yog cov hniav ntawm kev lag luam niaj hnub no.
Tungsten steel yog sintered composite khoom uas muaj tsawg kawg yog ib qho hlau carbide muaj pes tsawg leeg. 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 rau hauv thaj tsam ntawm 0.2-10 microns, thiab cov nplej carbide tau sib koom ua ke siv cov hlau khi. Cov hlau sib txuas feem ntau yog cov hlau hlau, feem ntau yog cobalt thiab npib tsib xee. Yog li muaj tungsten-cobalt alloys, tungsten-nickel alloys thiab tungsten-titanium-cobalt alloys.
Tungsten sinter forming yog nias cov hmoov rau hauv ib lub billet, ces mus rau hauv lub qhov cub sintering kom sov nws mus rau qhov kub thiab txias (sintering kub) thiab khaws cia rau qee lub sijhawm (tuav lub sijhawm), thiab tom qab ntawd txias kom tau cov tungsten hlau. cov khoom siv nrog cov khoom xav tau.
①Tungsten thiab cobalt cemented carbide
Cov khoom tseem ceeb yog tungsten carbide (WC) thiab binder cobalt (Co). Qib yog tsim los ntawm "YG" ("nyuaj, cobalt" hauv Hanyu Pinyin) thiab feem pua ntawm cov ntsiab lus cobalt nruab nrab. Piv txwv li, YG8, uas txhais tau hais tias qhov nruab nrab WCo = 8% thiab tus so yog tungsten carbide cemented carbide.
②Tungsten, titanium thiab cobalt cemented carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide (TiC) thiab cobalt. Qib yog tsim los 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 ntsiab lus ntawm tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide, tantalum carbide (los yog niobium carbide) thiab cobalt. Hom carbide no tseem hu ua general-purpose carbide lossis universal carbide. Qib muaj "YW" ("nyuaj" thiab "lab" hauv Hanyu Pinyin) ntxiv rau tus lej ua ntu zus, xws li YW1.
Tungsten steel muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam, corrosion kuj, thiab lwm yam, tshwj xeeb tshaj yog nws cov hardness siab thiab hnav kuj tseem nyob twj ywm tsis hloov txawm nyob rau ntawm qhov kub ntawm 500 ℃, thiab tseem muaj. siab hardness ntawm 1000 ℃. Cemented carbide yog dav siv los ua cov khoom siv, xws li cov cuab yeej tig, cov cuab yeej milling, xyaum, cov cuab yeej tho txawv, thiab lwm yam. Qhov kev txiav ceev ntawm cov carbide tshiab yog sib npaug rau ntau pua lub sij hawm ntawm cov pa roj carbon steel.
Post lub sij hawm: Feb-21-2023
