Bịa mụta maka HSS
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 nchara dị nkọ, nke pụtara na ọ na-esi ike ọbụna mgbe oyi na-ekpo ọkụ n'oge ikuku na-adị nkọ. A na-akpọkwa ya ígwè ọcha.
Igwe na-agba ọsọ dị elu bụ ígwè alloy nwere ihe mgbagwoju anya nwere carbide na-emepụta ihe dịka tungsten, molybdenum, chromium, vanadium na cobalt. Ngụkọta ego nke alloying ọcha ruru ihe dịka 10 ruo 25%. Ọ nwere ike ịnọgide na-enwe ike dị elu n'okpuru nnukwu okpomọkụ (ihe dị ka 500 ℃) na ịcha ọsọ dị elu, HRC nwere ike ịdị n'elu 60. Nke a bụ njirimara kachasị mkpa nke HSS - hardness red. Na carbon ngwá ọrụ ígwè site quenching na ala okpomọkụ tempering, na ụlọ okpomọkụ, ọ bụ ezie na e nwere nnọọ elu ekweghị ekwe, ma mgbe okpomọkụ dị elu karịa 200 ℃, ndị ekweghị ekwe ga-ada sharply, na 500 ℃ ekweghị ekwe ka ama esịn ka yiri ogo na. steeti annealed, tụfuru kpamkpam ike ịkpụ metal, nke na-egbochi ngwa ọrụ ịkpụ carbon ígwè. Na ígwè dị elu na-agba ọsọ n'ihi ezi isi ike na-acha uhie uhie, iji mejupụta adịghị ike na-egbu egbu nke ígwè ngwá ọrụ carbon.
A na-ejikarị ígwè dị elu eme ihe iji rụpụta ihe dị mgbagwoju anya dị nro na mmetụta na-eguzogide ígwè, kamakwa iji rụpụta ihe dị elu na-ekpo ọkụ na oyi extrusion nwụrụ, dị ka ngwá ọrụ ntụgharị, ihe ọkpụkpụ, hobs, igwe na-ahụ anya na-achọ anwụ.
Bịa mụta maka nchara tungsten
Tungsten ígwè (carbide) nwere usoro magburu onwe Njirimara dị ka elu ekweghị ekwe, eyi iguzogide, mma ike na ike, okpomọkụ na-eguzogide, corrosion eguzogide, wdg Karịsịa ya elu ekweghị ekwe na eyi iguzogide nọgidere ihu ọma agbanwe ọbụna na a okpomọkụ nke 500 ℃. ma ka nwere nnukwu ike na 1000 ℃.
Tungsten ígwè, nke isi ihe ya bụ tungsten carbide na cobalt, na-aza 99% nke ihe niile na 1% nke ọla ndị ọzọ, ya mere a na-akpọ ya tungsten steel, nke a makwaara dị ka carbide cimented, a na-ewerekwa ya dị ka ezé nke ụlọ ọrụ ọgbara ọhụrụ.
Tungsten ígwè bụ ihe na-agbakọta agbagọ nke nwere opekata mpe 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 akụrụngwa carbide (ma ọ bụ oge) na-adịkarị n'ogo nke 0.2-10 microns, a na-ejikọkwa ọka carbide ọnụ site na iji eriri igwe. Ọla ndị a na-ejikọta ya bụ ọla kọpa ígwè, nke na-abụkarị cobalt na nickel. N'ihi ya, e nwere tungsten-cobalt alloys, tungsten-nickel alloys na tungsten-titanium-cobalt alloys.
Tungsten sinter na-akpụ bụ ịpịa ntụ ntụ n'ime billet, wee banye n'ime ọkụ na-ekpo ọkụ iji kpoo ya na okpomọkụ ụfọdụ (ọkụ ọkụ) ma debe ya ruo oge ụfọdụ (ijide oge), wee mee ka ọ dị jụụ iji nweta tungsten ígwè. ihe onwunwe nwere ihe achọrọ.
① Tungsten na cobalt simenti carbide
Akụkụ bụ isi bụ tungsten carbide (WC) na binder cobalt (Co). Ihe mejupụtara ọkwa a bụ “YG” (“hard, cobalt” na Hanyu Pinyin) yana pasentị nke ọdịnaya cobalt dị nkenke. Dịka ọmụmaatụ, YG8, nke pụtara nkezi WCo = 8% na ndị ọzọ bụ tungsten carbide cemented carbide.
② Tungsten, titanium na cobalt cemented carbide
Ihe ndị bụ isi bụ tungsten carbide, titanium carbide (TiC) na cobalt. Ọkwa bụ nke “YT” (“ike, titanium” na Hanyu Pinyin) na nkezi ọdịnaya nke carbide titanium. Dịka ọmụmaatụ, YT15, pụtara nkezi TiC=15%, nke ọzọ bụ tungsten carbide na ọdịnaya cobalt nke tungsten titanium cobalt carbide.
③Tungsten-titanium-tantalum (niobium) carbide
Ihe ndị bụ isi bụ tungsten carbide, titanium carbide, tantalum carbide (ma ọ bụ niobium carbide) na cobalt. Ụdị carbide a na-akpọkwa carbide izugbe ma ọ bụ carbide zuru ụwa ọnụ. Ọkwa ahụ nwere “YW” (“ike” na “nde” na Hanyu Pinyin) gbakwunyere nọmba usoro, dị ka YW1.
Tungsten ígwè nwere usoro magburu onwe Njirimara dị ka elu ekweghị ekwe, eyi iguzogide, mma ike na ike siri ike, okpomọkụ na-eguzogide, corrosion eguzogide, wdg Karịsịa ya elu ekweghị ekwe na eyi iguzogide nọgidere ihu ọma agbanwe ọbụna na a okpomọkụ nke 500 ℃, ma ka nwere. elu ike na 1000 ℃. A na-eji carbide cemented eme ihe n'ọtụtụ ebe dị ka ihe, dị ka ngwá ọrụ ntụgharị, ngwá ọrụ egwe ọka, ihe ọkpụkpụ, ngwá ọrụ na-agwụ ike, wdg. Mbelata ọsọ nke carbide ọhụrụ ahụ hà ka narị ugboro nke carbon ígwè.
Oge nzipu: Feb-21-2023
