Yiza ufunde ngeHSS
Isinyithi esinesantya esiphezulu (HSS) sisixhobo sentsimbi enobunzima obuphezulu, ukumelana nokunxiba okuphezulu kunye nokumelana nobushushu obuphezulu, okwaziwa ngokuba yintsimbi yomoya okanye intsimbi ebukhali, oku kuthetha ukuba iqinisa naxa ipholile emoyeni ngexesha lokucima kwaye ibukhali.Ikwabizwa ngokuba yintsimbi emhlophe.
Isantya esiphezulu sensimbi yintsimbi ye-alloy ene-complex composition equkethe izinto ezenza i-carbide ezifana ne-tungsten, i-molybdenum, i-chromium, i-vanadium kunye ne-cobalt.Isixa esipheleleyo sezinto ezixutywayo sifikelela malunga ne-10 ukuya kwi-25%.Inokugcina ubunzima obuphezulu phantsi kobushushu obuphezulu (malunga ne-500 ℃) kwi-high speed cutting, i-HRC ingaba ngaphezu kwe-60. Le yimpawu ebaluleke kakhulu ye-HSS - ukuqina obomvu.Isixhobo sekhabhoni sentsimbi ngokucima kunye nobushushu obuphantsi, kwiqondo lobushushu obuphantsi, nangona kukho ubunzima obuphezulu kakhulu, kodwa xa iqondo lobushushu lingaphezulu kwama-200 ℃, ubunzima buya kuhla kakhulu, kwi-500 ℃ ubulukhuni buye buye bafikelela kwinqanaba elifanayo. i-annealed state, ilahlekelwe ngokupheleleyo ukukwazi ukusika isinyithi, esithintela izixhobo zokusika i-carbon tool steel.Kwaye isinyithi esinesantya esiphezulu ngenxa yobulukhuni obuhle obubomvu, ukwenza ukusilela okubulalayo kwe-carbon tool steel.
Intsimbi enesantya esiphezulu isetyenziswa ikakhulu ukwenza izixhobo zokusika zentsimbi ezintsonkothileyo nezinganyangekiyo kwimpembelelo, kodwa nokwenza iibheringi ezinobushushu obuphezulu kunye nokufa okubandayo, okufana nezixhobo zokujika, iidrili, iihobs, iiblade zoomatshini kunye nokufa okufunwayo.
Yiza ufunde malunga nentsimbi ye-tungsten
Intsimbi yeTungsten (i-carbide) inoluhlu lweempawu ezibalaseleyo ezinjengokuqina okuphezulu, ukuxhathisa ukunxiba, ukomelela okungcono kunye nokuqina, ukumelana nobushushu, ukuxhathisa umhlwa, njl njl. kwaye usenobunzima obuphezulu kwi-1000 ℃.
Insimbi ye-Tungsten, i-tungsten carbide kunye ne-cobalt, i-akhawunti ye-99% yazo zonke izinto kunye ne-1% yezinye isinyithi, ngoko ibizwa ngokuba yintsimbi ye-tungsten, eyaziwa ngokuba yi-cemented carbide, kwaye ithathwa njengamazinyo oshishino lwanamhlanje.
Insimbi ye-Tungsten yinto edibeneyo edibeneyo equlethe ubuncinane enye i-carbide yensimbi.I-tungsten carbide, i-cobalt carbide, i-niobium carbide, i-titanium carbide, kunye ne-tantalum carbide zizinto eziqhelekileyo zentsimbi ye-tungsten.Ubungakanani obuziinkozo becandelo le-carbide (okanye isigaba) ngokuqhelekileyo kuluhlu lwe-0.2-10 microns, kunye neengqolowa ze-carbide ziboshwe kunye zisebenzisa i-binder yensimbi.Iintsimbi ezidityanisiweyo zidla ngokuba ziintsimbi zeqela lentsimbi, ngokuqhelekileyo icobalt kunye nenickel.Ngaloo ndlela kukho i-tungsten-cobalt alloys, i-tungsten-nickel alloys kunye ne-tungsten-titanium-cobalt alloys.
Ukwenza i-tungsten sinter kukucinezela umgubo kwi-billet, emva koko ube kwiziko lokutshisa ukutshisa kwiqondo elithile lobushushu (ubushushu be-sintering) kwaye uyigcine ixesha elithile (ubambe ixesha), kwaye emva koko uyipholise ukuze ufumane intsimbi ye-tungsten. impahla eneempawu ezifunekayo.
①I-tungsten kunye ne-cobalt enesamente carbide
Icandelo eliphambili yi-tungsten carbide (WC) kunye ne-binder cobalt (Co).Ibakala liqulunqwe "YG" ("hard, cobalt" eHanyu Pinyin) kunye nepesenti yomxholo wecobalt ophakathi.Umzekelo, i-YG8, ethetha ukuba i-WCo ephakathi = 8% kwaye enye i-tungsten carbide cemented carbide.
②I-tungsten, i-titanium kunye ne-cobalt ye-cemented carbide
Amacandelo aphambili yi-tungsten carbide, titanium carbide (TiC) kunye ne-cobalt.Ibakala lenziwe nge-"YT" ("hard, titanium" eHanyu Pinyin) kunye nomxholo ophakathi we-titanium carbide.Umzekelo, i-YT15, ithetha i-avareji ye-TiC=15%, enye yi-tungsten carbide kunye nomxholo we-cobalt we-tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
Amacandelo aphambili yi-tungsten carbide, i-titanium carbide, i-tantalum carbide (okanye i-niobium carbide) kunye ne-cobalt.Olu hlobo lwe-carbide lukwabizwa ngokuba yi-carbide-purpose-purpose okanye i-universal carbide.Ibakala liquka "YW" ("hard" kunye "nesigidi" kwiHanyu Pinyin) kunye nenani elilandelelanayo, elifana ne-YW1.
Intsimbi yeTungsten inothotho lweepropati ezigqwesileyo ezinjengokuqina okuphezulu, ukuxhathisa ukunxiba, ukomelela okungcono kunye nokuqina, ukumelana nobushushu, ukuxhathisa umhlwa, njl njl. ubunzima obuphezulu kwi-1000 ℃.I-carbide ene-cemented isetyenziswa ngokubanzi njengezinto eziphathekayo, ezifana nezixhobo zokuguqula, izixhobo zokugaya, i-drills, izixhobo ezithandekayo, njl.
Ixesha lokuposa: Feb-21-2023
