Huya udzidze nezveHSS
High-speed steel (HSS) isimbi yemudziyo ine kuoma kwepamusoro, kukwirira kupfeka kusagadzikana uye kupisa kwakanyanya, inozivikanwawo sesimbi yemhepo kana simbi inopinza, zvichireva kuti inoomesa kunyangwe ichitonhodzwa mumhepo panguva yekudzima uye inopinza. Inonziwo simbi chena.
Yekumhanya simbi isimbi yealloy ine yakaoma kuumbwa ine carbide inogadzira zvinhu zvakaita se tungsten, molybdenum, chromium, vanadium uye cobalt. Huwandu hwezvinhu zvealloying hunosvika pa10 kusvika 25%. Inogona kuchengetedza kuoma kwakanyanya pasi pekupisa kukuru (inenge 500 ℃) mukucheka kwepamusoro, HRC inogona kuva pamusoro pe 60. Ichi ndicho chinonyanya kukosha chimiro cheHSS - tsvuku yakaoma. Uye kabhoni mudziyo simbi nekudzima uye yakaderera tembiricha kudziya, pakamuri tembiricha, kunyangwe paine kuomarara kwakanyanya, asi kana tembiricha yakwira kupfuura 200 ℃, kuoma kunodonha zvakanyanya, mu500 ℃ kuomarara kwakadonha kusvika padanho rakafanana ne iyo annealed state, yakarasa zvachose kugona kucheka simbi, iyo inoganhura iyo kabhoni mudziyo simbi yekucheka maturusi. Uye simbi yepamusoro-soro nekuda kwekuoma kwakatsvuka kwakanaka, kugadzirisa kukanganisa kunouraya kwecarbon tool steel.
Simbi inomhanya-mhanya inonyanya kushandiswa kugadzira maturusi akaonda-kumucheto uye anodzivirira-anodzivirira simbi yekucheka maturusi, asiwo kugadzira-yepamusoro-tembiricha mabhengi uye inotonhora extrusion inofa, senge maturusi ekutenderedza, zvibooreso, hobs, muchina masaha blades uye zvinoda kufa.
Huya udzidze nezve tungsten simbi
Tungsten simbi (carbide) ine nhevedzano yezvinhu zvakanakisa senge kuomarara kwakanyanya, kupfeka kuramba, kusimba kuri nani uye kuomarara, kupisa kupisa, kushomeka kwemarara, etc. Kunyanya kuomarara kwayo kwakanyanya uye kusagadzika kwekupfeka kunoramba kusingachinjiki kunyangwe patembiricha ye500 ℃, uye uchine kuoma kwakanyanya pa1000 ℃.
Tungsten simbi, ine zvikamu zvikuru zve tungsten carbide uye cobalt, inotora 99% yezvikamu zvose uye 1% yezvimwe simbi, saka inonzi tungsten simbi, inozivikanwawo secemented carbide, uye inonzi mazino emabhizimisi emazuva ano.
Tungsten simbi ndeye sintered composite zvinhu zvine kanenge imwe simbi carbide kuumbwa. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, uye tantalum carbide zvinhu zvakajairika zvetungsten simbi. Saizi yezviyo zvechikamu checarbide (kana chikamu) chinowanzo muchikamu che 0.2-10 microns, uye tsanga dzecarbide dzinobatanidzwa pamwechete uchishandisa simbi binder. Masimbi ekubatanidza anowanzo simbi dzeboka resimbi, kazhinji cobalt uye nickel. Nokudaro kune tungsten-cobalt alloys, tungsten-nickel alloys uye tungsten-titanium-cobalt alloys.
Tungsten sinter kuumba ndeyekudzvanya hupfu mubillet, wozoisa muchoto chekupisa kuti upise kune imwe tembiricha (sintering tembiricha) woichengeta kwenguva yakati (kubata nguva), wozoitonhodza pasi kuti utore tungsten simbi. zvinhu zvine zvinhu zvinodiwa.
①Tungsten uye cobalt simende carbide
Chinhu chikuru ndeye tungsten carbide (WC) uye binder cobalt (Co). Giredhi rinoumbwa ne "YG" ("yakaoma, cobalt" muHanyu Pinyin) uye chikamu cheavhareji yecobalt yemukati. Semuenzaniso, YG8, zvinoreva avhareji WCo = 8% uye yasara ndeye tungsten carbide cemented carbide.
②Tungsten, titanium uye cobalt simende carbide
Izvo zvakakosha zvinoumba tungsten carbide, titanium carbide (TiC) uye cobalt. Giredhi rinoumbwa ne "YT" ("yakaoma, titanium" muHanyu Pinyin) uye avhareji yemukati yetitanium carbide. Semuenzaniso, YT15, zvinoreva avhareji TiC = 15%, yasara ndeye tungsten carbide uye cobalt yemukati tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
Zvikuru zvinoumba tungsten carbide, titanium carbide, tantalum carbide (kana niobium carbide) uye cobalt. Mhando iyi yecarbide inodaidzwa zvakare kunzi general-purpose carbide kana universal carbide. Giredhi rine “YW” (“yakaoma” uye “miriyoni” muHanyu Pinyin) pamwe nenhamba inotevedzana, yakaita seYW1.
Tungsten simbi ine nhevedzano yezvinhu zvakanakisa zvakadai sekuomarara kwepamusoro, kusapfeka, simba riri nani uye kuomarara, kusapisa kupisa, kusaita ngura, etc. Kunyanya kuomarara kwayo kwakanyanya uye kusapfeka kwekudzivirira kunoramba kusingachinjike kunyangwe patembiricha ye500 ℃, uye ichine. kuoma kwakanyanya pa1000 ℃. Cemented carbide inoshandiswa zvakanyanya sezvinhu, zvakadai sematurusi ekushandura, maturusi ekugaya, zviboorero, maturusi anofinha, nezvimwewo. Iyo yekucheka kukurumidza kweiyo carbide itsva yakaenzana nemazana enguva iyo yekabhoni simbi.
Nguva yekutumira: Feb-21-2023
