Martensitic igwe anaghị agba nchara na-ezo aka n'ụdị igwe anaghị agba nchara nke microstructure bụ tumadi martensite. Ọdịnaya chromium nke martensitic igwe anaghị agba nchara dị na nso nke 12% - 18%, na ihe ndị bụ isi alloying bụ ígwè, chromium, nickel na carbon.
Igwe anaghị agba nchara nke Martensitic nwere ike ịhazigharị akụrụngwa ya site na ọgwụgwọ okpomọkụ ma bụrụ ụdị igwe anaghị agba nchara siri ike. Enwere ike kewaa igwe anaghị agba nchara Martensitic chromium na martensitic chromium-nickel steel dị ka ihe mejupụtara kemịkalụ dị iche iche si dị.
Nlele ngwa ngwa nke Martensitic igwe anaghị agba nchara | |
| Otu | Igwe anaghị agba nchara |
| Nkọwa | Ụdị igwe anaghị agba nchara siri ike nwere usoro Martensitic |
| Ọgwụgwọ okpomọkụ | Na-agwụ ike, na-agwụ ike, na-ewe iwe |
| Alloy Elements | Cr, Ni, C, Mo, V |
| Weldability | Ogbenye |
| Igwe magnetik | Ọkara |
| Micro Structure | Ọ bụ Martensitic |
| Ụdị akara ule | Cr13, 2Cr13, 3Cr13 |
| Ngwa | Uzuoku turbine agụba, Tebụlụ, Ngwa ịwa ahụ, ikuku ikuku, ụlọ ọrụ mmiri |
Martensitic igwe anaghị agba nchara na-ezo aka n'ụdị igwe anaghị agba nchara nke microstructure bụ tumadi martensite. Ọdịnaya chromium nke martensitic igwe anaghị agba nchara dị na nso nke 12% - 18%, na ihe ndị bụ isi alloying bụ ígwè, chromium, nickel na carbon.
Igwe anaghị agba nchara nke Martensitic nwere ike ịhazigharị akụrụngwa ya site na ọgwụgwọ okpomọkụ ma bụrụ ụdị igwe anaghị agba nchara siri ike. Enwere ike kewaa igwe anaghị agba nchara Martensitic chromium na martensitic chromium-nickel steel dị ka ihe mejupụtara kemịkalụ dị iche iche si dị.
1. Martensitic Chromium Steel
Na mgbakwunye na chromium, martensitic chromium ígwè nwekwara ụfọdụ ego nke carbon. Ọdịnaya chromium na-ekpebi nguzogide corrosion nke ígwè. Ọdịnaya carbon dị elu, ike dị elu, isi ike na nguzogide eyi. Ọdịdị nkịtị nke ụdị ígwè a bụ martensite, ụfọdụ nwekwara obere austenite, ferrite ma ọ bụ pearlite. A na-ejikarị emepụta akụkụ, components, ngwá ọrụ, mma, wdg na-achọ ike dị elu na ike siri ike, ma ọ dịghị achọ nnukwu nkwụsị nke corrosion. Ụdị akara nchara a na-ahụkarị bụ 2Crl3, 4Crl3, 9Crl8, wdg.
2. Martensitic Chromium-Nickel ígwè
Martensitic chromium-nickel ígwè na-agụnye martensitic mmiri ozuzo hardening igwe anaghị agba nchara, ọkara-austenitic mmiri ozuzo hardening igwe anaghị agba nchara na maraging igwe anaghị agba nchara, wdg, nke niile bụ elu-ike ma ọ bụ ultra-elu-ike igwe anaghị agba nchara. Ụdị ígwè a nwere obere carbon ọdịnaya (ihe na-erughị 0.10%) ma nwee nickel. Ụfọdụ akara ule nwekwara nnukwu ihe dị ka molybdenum na ọla kọpa. Ya mere, ụdị ígwè a nwere ike dị elu, ebe ọ na-ejikọta ike na ike yana nkwụsị nke corrosion. Arụmọrụ, weldability, wdg dị mma karịa martensitic chromium ígwè. Crl7Ni2 bụ igwe anaghị agba nchara dị obere nickel martensitic.
Martensitemmiri ozuzo hardening igwe anaghị agba ncharaígwè na-enwekarị Al, Ti, Cu na ihe ndị ọzọ. Ọ na-ebuli Ni3A1, Ni3Ti na usoro mgbasa ozi ndị ọzọ na-agbasi ike na matrix martensite site na mmiri ozuzo siri ike iji meziwanye ike nke ígwè ahụ. Semi-austenite (ma ọ bụ ọkara martensitic) ọdịda mmiri hardening igwe anaghị agba nchara, n'ihi na quenched ala ka austenite, otú ahụ menyụọ ala ka nwere ike oyi na-arụ ọrụ na mgbe ahụ ike site n'etiti ọgwụgwọ, ịka nká ọgwụgwọ na ndị ọzọ Filiks. N'ụzọ dị otú a, austenite na martensitic mmiri ozuzo hardening igwe anaghị agba nchara nwere ike ozugbo ghọọ martensite mgbe quenching, nke na-eduga ná mwepu nke ihe isi ike na-esote nhazi na akpụ. Akara nchara a na-ejikarị bụ 0Crl7Ni7AI, 0Crl5Ni7M02A1 na ndị ọzọ. Ụdị ígwè a nwere ike dị elu dịtụ elu, na-erukarị 1200-1400 MPa, a na-ejikarị eme akụkụ nhazi nke na-adịghị achọ nnukwu nkwụsị nke corrosion kama ọ chọrọ ike dị elu.
Ngwọta okpomọkụ a na-ejikarị eme ihe maka igwe anaghị agba nchara martensitic bụ ọgwụgwọ na-ekpo ọkụ ma na-ewe iwe ọkụ. Na-ahọrọ ka ajụkwa mmanụ ma ọ bụ ikuku na okpomọkụ nke 950-1050 ℃. Mgbe ahụ, kpoo ọkụ na 650-750 ° C. N'ozuzu, ọ ga-ewe iwe ozugbo emenyụchara ka ọ ghara igbochi nkedo ahụ ka ọ ghara ịgbawa n'ihi nrụgide nke ihe owuwu a kwụsịrị.
Igwe anaghị agba nchara nke nwere obere carbon martensitic nwere obere nickel, molybdenum, silicon na ihe ndị ọzọ alloying nwere ezigbo ihe eji arụ ọrụ zuru oke, ihe ịgbado ọkụ ma na-eyi nguzogide mgbe emezigharị na iwe ọkụ. A na-eji nkedo dị otú ahụ eme ihe n'ọtụtụ ebe na nkedo integral na nkedo + ịgbado ọkụ nke nnukwu turbines hydraulic. N'okwu a, nkọwa ọgwụgwọ okpomọkụ na-ahọrọkarị bụ normalizing na 950 - 1050 ℃ na tempering na 600-670 ℃.
Oge nzipu: Ọgọst-17-2021