PH igwe anaghị agba nchara

Mmiri mmiri ozuzo siri ike igwe anaghị agba nchara nwere ihe ndị zuru oke dị ka ike dị elu, ịdị elu siri ike, nguzogide corrosion dị elu, nguzogide oxidation dị elu, yana ezigbo nhazi na weldability.

akara ule a na-ahụkarị

(1)0Cr17Ni4Cu4Nb steel

Igwe anaghị agba nchara bụ mmiri ozuzo martensitic na-eme ka igwe anaghị agba nchara nke nwere ebe Ms dị ihe dịka 150C yana ebe Mf n'okpuru 30°C. Ma mgbanwe martensitic zuru oke ma ọ bụ na-emetụta usoro nhazi na usoro jụrụ oyi. A na-agbasa ọla kọpa na nchara na matriks n'ụdị dị oke mma ma gbasasịa ε oge, si otú ahụ na-eme ka ike dịkwuo mma. N'oge ọgwụgwọ H900, σb=1310MPa, σ0.2=1170MPa, δ5=10%, ψ=40%. Igwe anaghị agba nchara a nwere ezigbo nguzogide corrosion, nke dị mma karịa nke igwe anaghị agba nchara martensitic ma yie nke austenitic igwe anaghị agba nchara. Ọ nwere ezigbo ịkpụ ọrụ, enwere ike ịgbanye ya na-enweghị preheating na ọ dịghị achọ annealing mpaghara mgbe ịgbado ọkụ. A na-ejikarị ya arụpụta ihe ndị na-eguzogide corrosion na ike dị elu dị ka ihe mkpuchi nke jet engine compressor casings na nnukwu turbine ikpeazụ agụba.

(2) 0Cr17Ni7Al ígwè

Nke a ọkwa bụ ọkara-austenitic ọdịda anyanwụ ike igwe anaghị agba nchara. Ọ bụ ụdị nchara na-agbakwunye aluminum na 0Cr17Ni7, ígwè austenitic na-adịghị akwụsi ike, wee mee ka ọ sie ike site na mgbanwe martensitic na ọdịda nke ogige NiAl. Mgbe ọgwụgwọ RH950 gasịrị, σb=1580MPa, σ0.2=1470MPa, δ5=6%. Nchara ahụ nwere ezigbo nguzogide corrosion na acid oxidizing, mana nguzogide corrosion na-adịghị mma na acid na-adịghị oxidizing dị ka sulfuric acid na hydrochloric acid. Nguzogide acid kacha mma mgbe ejiri A ma ọ bụ A1750 gwọọ ya. Nguzogide acid na-akawanye njọ mgbe a gwọchara ya na TH, RH, na CH. Enwere ike ịgbanye ígwè a site na iji otu usoro ịgbado ọkụ dị ka austenitic igwe anaghị agba nchara. Ọ bụrụ na a na-eji mkpanaka ịgbado ọkụ nke nwere otu ihe dị ka metal ntọala maka ịgbado ọkụ, nnukwu ego nke delta ferrite ga-apụta na weld, na-ebute mbelata nke ike nke weld. Ya mere, chromium nwere ike belata nke ọma ma ọ bụ nickel mụbaa na mkpanaka ịgbado ọkụ. Ekwesịrị iji nchebe gas na-enweghị isi mee ihe n'oge ịgbado ọkụ iji gbochie oxidation nke aluminom na electrode. Iji nweta ezigbo ịgbado ọkụ arụmọrụ, ọ kasị mma ịrụ ngwọta ọgwụgwọ na weldments mgbe ngwọta annealing, na mgbe ahụ mezie na afọ ha. A na-ejikarị ụdị ígwè a na-emepụta casings ụgbọ elu, akụkụ nhazi, ụgbọ mmiri na-agba ọsọ ngwa ngwa na akụkụ, akụkụ engine jet, isi iyi, diaphragms, bellows, antennas, fasteners, quired equipments, wdg.

(3)0Cr15Ni25Ti2MoVB steel

Igwe anaghị agba nchara bụ austenitic ọdịda-mmiri siri ike igwe anaghị agba nchara, ihe na-ekpo ọkụ na-ekpo ọkụ dabere na ígwè-nickel. Steel nwere usoro austenite kwụsiri ike ọ bụghị naanị na steeti ngwọta siri ike kamakwa na steeti ịka nká. - N'ozuzu, a na-emepụta ogige intermetallic na ígwè iji mee ka ike dịkwuo elu ma melite njirimara okpomọkụ. Na steeti ịka nká σb=1035MPa, σ0.2=690MPa, δ=25%, ψ=40%. Nchara a nwere ezigbo ike dị elu ma enwere ike iji ya mee ihe na okpomọkụ ruo 600-700 ° C. The elu okpomọkụ mkpụrụ ike n'okpuru 650 ℃ bụ fọrọ nke nta ka otu ụlọ okpomọkụ. Ọ nwere ezigbo ike obere okpomọkụ, mana ọ nwere mmejọ dị ka ike okpomọkụ dị ala na arụmọrụ ịgbado ọkụ na-adịghị mma.