Yiza ufunde nge-HSS
Intsimbi ekhawulezayo (i-HSS) yintsimbi yesixhobo enobunzima obuphezulu, ukumelana nokuguguleka okuphezulu kunye nokumelana nobushushu obuphezulu, eyaziwa ngokuba yintsimbi yomoya okanye intsimbi ebukhali, oko kuthetha ukuba iyaqina nokuba ipholile emoyeni ngexesha lokucima kwaye ibukhali. Ikwabizwa ngokuba yintsimbi emhlophe.
Intsimbi ekhawulezayo yintsimbi ye-alloy enomxholo ontsonkothileyo oqulethe izinto ezenza i-carbide ezifana ne-tungsten, i-molybdenum, i-chromium, i-vanadium kunye ne-cobalt. Inani lilonke lezinto ezidibanisayo lifikelela malunga ne-10 ukuya kwi-25%. Ingagcina ubunzima obuphezulu phantsi kobushushu obuphezulu (malunga ne-500℃) ekusikeni ngesantya esiphezulu, i-HRC ingaba ngaphezulu kwama-60. Olu lolona phawu lubalulekileyo lwe-HSS - ubunzima obomvu. Kwaye intsimbi yesixhobo sekhabhoni ngokuyicima kunye nobushushu obuphantsi, kubushushu begumbi, nangona kukho ubunzima obuphezulu kakhulu, kodwa xa ubushushu buphezulu kune-200 ℃, ubunzima buya kwehla kakhulu, kwi-500 ℃ ubunzima buye buyehla kwinqanaba elifanayo nemeko ye-annealed, ilahlekelwe ngokupheleleyo kubuchule bokusika isinyithi, nto leyo ethintela izixhobo zokusika isinyithi sekhabhoni. Kwaye intsimbi ekhawulezayo ngenxa yobunzima obuhle obomvu, ukuze ihlawule iintsilelo ezibulalayo zentsimbi yesixhobo sekhabhoni.
Intsimbi ekhawulezayo isetyenziswa kakhulu ekwenzeni izixhobo zokusika zesinyithi ezintsonkothileyo nezinomgca omncinci nezimelana nokuchaphazeleka, kodwa ikwasetyenziselwa ukuvelisa iibheringi ezishushu kakhulu kunye nee-cold extrusion dies, ezifana nezixhobo zokujika, ii-drill, ii-hobs, ii-machine saw blades kunye nee-demanding dies.
Yiza ufunde ngentsimbi ye-tungsten
Intsimbi yeTungsten (ikhabhayithi) ineempawu ezininzi ezintle ezifana nokuqina okuphezulu, ukumelana nokuguguleka, amandla angcono kunye nokuqina, ukumelana nobushushu, ukumelana nokugqwala, njl. Ingakumbi ubunzima bayo obuphezulu kunye nokumelana nokuguguleka azitshintshi nokuba kubushushu obuyi-500℃, kwaye zisenobunzima obuphezulu kwi-1000℃.
Intsimbi yeTungsten, enezinto eziphambili ezizii-tungsten carbide kunye ne-cobalt, ibandakanya i-99% yazo zonke izinto kunye ne-1% yezinye izinyithi, ngoko ke ibizwa ngokuba yi-tungsten steel, ekwaziwa ngokuba yi-cemented carbide, kwaye ithathwa njengeyona nto iphambili kushishino lwanamhlanje.
Intsimbi yeTungsten yinto edityanisiweyo equlethe ubuncinci umxube we-carbide yesinyithi enye. I-Tungsten carbide, i-cobalt carbide, i-niobium carbide, i-titanium carbide, kunye ne-tantalum carbide zizinto eziqhelekileyo zentsimbi ye-tungsten. Ubungakanani bengqolowa yenxalenye ye-carbide (okanye isigaba) buhlala buphakathi kwe-0.2-10 microns, kwaye iinkozo ze-carbide zidityaniswe kunye kusetyenziswa i-metal binder. Iintsimbi ezidityanisiweyo zihlala ziintsimbi zeqela lesinyithi, zihlala ziyi-cobalt kunye ne-nickel. Ke ngoko kukho ii-alloys ze-tungsten-cobalt, ii-alloys ze-tungsten-nickel kunye nee-alloys ze-tungsten-titanium-cobalt.
Ukwenziwa kwe-tungsten sinter kukucinezela umgubo kwi-billet, emva koko ungene kwisithando sokutshisa ukuze ufudumale ukuya kubushushu obuthile (ubushushu bokutshisa) uze uwugcine ixesha elithile (ixesha lokubamba), uze uwupholise ukuze ufumane izinto zentsimbi ye-tungsten ezineempawu ezifunekayo.
①I-tungsten kunye ne-cobalt carbide eqinisiweyo
Icandelo eliphambili yi-tungsten carbide (WC) kunye ne-binder cobalt (Co). Uhlobo lwenziwe yi-“YG” (“i-cobalt eqinileyo” kwi-Hanyu Pinyin) kunye nepesenti yomxholo ophakathi we-cobalt. Umzekelo, i-YG8, oko kuthetha ukuba umyinge we-WCo = 8% kwaye okuseleyo yi-tungsten carbide cemented carbide.
②I-tungsten, i-titanium kunye ne-cobalt efakwe isamente
Izinto eziphambili yi-tungsten carbide, i-titanium carbide (TiC) kunye ne-cobalt. Udidi lwenziwe yi-“YT” (“i-hard, titanium” kwi-Hanyu Pinyin) kunye nomxholo ophakathi we-titanium carbide. Umzekelo, i-YT15, ithetha i-TiC ephakathi = 15%, okuseleyo yi-tungsten carbide kunye nomxholo we-cobalt we-tungsten titanium cobalt carbide.
③Ikhabhayithi yeTungsten-titanium-tantalum (niobium)
Izinto eziphambili yi-tungsten carbide, i-titanium carbide, i-tantalum carbide (okanye i-niobium carbide) kunye ne-cobalt. Olu hlobo lwe-carbide lukwabizwa ngokuba yi-general-purpose carbide okanye i-universal carbide. Uhlobo luquka "YW" ("hard" kunye "million" kwi-Hanyu Pinyin) kunye nenani elilandelelanayo, njenge-YW1.
Intsimbi yeTungsten ineempawu ezintle kakhulu ezifana nokuqina okuphezulu, ukumelana nokuguguleka, amandla angcono kunye nokuqina, ukumelana nobushushu, ukumelana nokugqwala, njl. Ingakumbi ubunzima bayo obuphezulu kunye nokumelana nokuguguleka azitshintshi nokuba kubushushu obuyi-500℃, kwaye zisenobunzima obuphezulu kwi-1000℃. I-carbide enesamente isetyenziswa kakhulu njengezixhobo, ezifana nezixhobo zokujika, izixhobo zokugaya, iidrili, izixhobo zokubhoboza, njl. Isantya sokusika se-carbide entsha silingana namaxesha angamakhulu kunentsimbi yekhabhoni.
Ixesha lokuthumela: Feb-21-2023
