Bịa ghọta nchara dị elu
Igwe ọkụ dị elu (HSS) bụ ngwá ọrụ ígwè na-esi ike dị elu, nkwụsị elu na-eguzogide ọgwụ na okpomọkụ dị elu, nke a makwaara dị ka ígwè ikuku ma ọ bụ n'ihu ígwè, nke pụtara na ọ nwere ike isi ike ọbụna mgbe ọ na-ajụ oyi na ikuku n'oge quenching, na ọ dị nkọ nke ukwuu. A na-akpọkwa ya ígwè ọcha.
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Igwe na-agba ọsọ dị elu bụ igwe na-arụ ọrụ dị mgbagwoju anya, nwere ihe ndị na-emepụta carbide dị ka tungsten, molybdenum, chromium, vanadium, na cobalt. Ngụkọta ego nke alloying ọcha bụ ihe dịka 10-25%. Ọ ka nwere ike ịnọgide na-enwe ike dị elu n'okpuru ọnọdụ okpomọkụ dị elu nke a na-emepụta site na ịkpụ ọsọ ọsọ (ihe dị ka 500 ℃), na HRC ya nwere ike ịdị n'elu 60. Nke a bụ njirimara kachasị mkpa nke ígwè dị elu - siri ike na-acha uhie uhie. Mgbe emenyụ na okpomọkụ dị ala, ígwè ọrụ carbon nwere ike dị elu na ụlọ okpomọkụ, ma mgbe okpomọkụ dị elu karịa 200 ° C, ike ahụ na-adaba nke ọma, na ike agbadala n'ogo dị ka nke annealed ala. 500°C. , Etufuru kpamkpam ike ịkpụ ígwè, nke na-egbochi iji ígwè ngwá ọrụ carbon maka ịkpụ ngwaọrụ. Igwe ọkụ na-agba ọsọ na-eme ka adịghị ike na-egbu egbu nke ngwá ọrụ carbon ígwè n'ihi na ọ dị mma na-acha uhie uhie.
A na-ejikarị ígwè dị elu eme ihe iji rụpụta eriri dị mgbagwoju anya na ngwaọrụ ịkpụ ígwè na-eguzogide mmetụta, yana ọkụ ọkụ na-ekpo ọkụ na extrusion oyi na-anwụ, dị ka ngwá ọrụ ntụgharị, akuwa mmiri, hobs, igwe na-ahụ anya, na ihe ndị na-achọsi ike.
▌ Ka anyị mụta maka nchara tungsten
Tungsten ígwè (tungsten carbide) nwere usoro ihe ndị magburu onwe ya dị ka isi ike dị elu, na-eyi nkwụsi ike, ike dị mma na ike siri ike, okpomọkụ na-eguzogide na corrosion eguzogide, karịsịa ya elu siri ike ma na-eyi nguzogide, ọbụna na okpomọkụ nke 500 Celsius C. Ọ na-anọgide. n'ụzọ bụ isi agbanwebeghị, ma ọ ka nwere nnukwu ike na 1000 Celsius.
Tungsten ígwè, ihe ndị bụ isi bụ tungsten carbide na cobalt, nke na-aza 99% nke ihe niile, na 1% bụ ọla ndị ọzọ, ya mere a na-akpọ ya tungsten steel, nke a makwaara dị ka carbide cimented, a na-ewerekwa ya dị ka eze nke oge a. ụlọ ọrụ.
Tungsten ígwè bụ ihe sintered mejupụtara ihe mejupụtara ma ọ dịkarịa ala otu carbide metal. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, na tantalum carbide bụ ihe a na-ahụkarị nke tungsten ígwè. Ogo ọka nke akụkụ carbide (ma ọ bụ oge) na-abụkarị n'etiti 0.2-10 microns, a na-ejikọta mkpụrụ osisi carbide ọnụ site na iji ihe nkedo ígwè. Ọla na-ekekọta bụ n'ozuzu ígwè otu ọla, nke a na-ejikarị bụ cobalt na nickel. Ya mere, e nwere tungsten-cobalt alloys, tungsten-nickel alloys na tungsten-titanium-cobalt alloys.
Ihe nkedo nke tungsten nchara bụ ịpịa ntụ ntụ n'ime billet, wee kpoo ya ọkụ n'ime ọkụ na-ekpo ọkụ ruo otu okpomọkụ (ọkụ ọkụ), debe ya ruo oge ụfọdụ (njide oge), wee mee ka ọ dị jụụ iji nweta ya. ihe nchara tungsten nwere ihe ndi choro.
① Tungsten-cobalt simenti carbide
Ihe ndị bụ isi bụ tungsten carbide (WC) na binder cobalt (Co). Ọkwa ya bụ “YG” (mkpụrụedemede pinyin nke China nke “hard, cobalt”) yana pasentị nke ọdịnaya cobalt dị nkenke. Dịka ọmụmaatụ, YG8 pụtara na nkezi WCo = 8%, nke ọzọ bụ tungsten-cobalt cemented carbide nke tungsten carbide.
② Tungsten-titanium-cobalt carbide simenti
Ihe ndị bụ isi bụ tungsten carbide, titanium carbide (TiC) na cobalt. Ọkwa ya bụ “YT” (mkpụrụedemede pinyin nke China nke “hard, titanium”) na nkezi ọdịnaya nke carbide titanium. Dịka ọmụmaatụ, YT15 pụtara na nkezi TiC = 15%, nke ọzọ bụ tungsten carbide na cobalt nke tungsten-titanium-cobalt nke simented carbide.
③Tungsten-titanium-tantalum (niobium) nke sitere na simenti carbide
Ihe ndị bụ isi bụ tungsten carbide, titanium carbide, tantalum carbide (ma ọ bụ niobium carbide) na cobalt. A na-akpọkwa ụdị carbide cemented a n'ozuzu carbide cemented ma ọ bụ eluigwe na ala cemented carbide. Ọkwa ya bụ “YW” (mkpụrụedemede nke pinyin Chinese nke “hard” na “wan”) gbakwunyere nọmba usoro, dị ka YW1.
Tungsten ígwè nwere usoro ihe ndị magburu onwe ya dị ka ike siri ike, na-eyi nguzogide, ike dị mma na ike siri ike, okpomọkụ na-eguzogide na corrosion iguzogide, karịsịa elu ya siri ike ma na-eyi nguzogide, nke na-anọgide na-agbanwe agbanwe ọbụna na okpomọkụ nke 500 ° C. Ọ ka nwere isi ike dị elu na 1000 Celsius. A na-eji carbide cemented eme ihe n'ọtụtụ ebe dị ka ihe eji eme ihe, dị ka ngwá ọrụ na-atụgharị, ndị na-egwe ọka, ihe ọkụkụ, ngwá ọrụ na-agwụ ike, wdg. Mbelata ọsọ nke carbide cimented ọhụrụ bụ ọtụtụ narị ugboro nke carbon ígwè.
Oge nzipu: Ọgọst-09-2023
