Nyowani metallurgical tekinoroji

Ngura inodzivirira simbi chiwanikwa castings main kupisa kurapwa kunodzivirira:

• 1) Quenching uye tempering kurapwa. Kunyanya kuwana martensite uye kudzivirira carbide kunaya; kudzima uye kutsamwa ndiko kubvisa kupera simba kunetseka uye nekuvandudza kuomarara.
• 2) Kugadzirisa + kutsamwa. Yakadzika-kabhoni martensitic ngura-isingagadzirisike simbi ine diki nickel, molybdenum, silicon nezvimwe zvinhu, mushure mekumisikidza + tempering kurapwa, epamhepo zvivakwa zvinovandudzwa.

Ferritic ngura inodzivirira simbi, iyi simbi ine w (C) ≤ 0.12% uye w (Cr) pakati pe15-20%. Main kupisa nzira dzokurapa:

• 1) se-yakakandwa;
• 2) Kuwedzera. Iyo yekuwedzera tembiricha haifanire kunge iri yakaderera pane 540 ° C, kana kukwira kupfuura 850 ° C.

Munguva yekudziya, kana tembiricha yasvika pa350 ° C, kupisa kwekupedzisira kunoiswa kwenguva yakati yekudzivirira kushushikana kukuru pakukanda.

Austenitic ngura inodzivirira simbiiyo yakajairwa simbi giredhi i1Cr18Ni9Ti. Main kupisa nzira dzokurapa:

• 1) Solid mhinduro. Kudzingwa kwacho kunopisa kusvika pa950-1175 ° C, uye zvinosarudzika kutora nzira yekupisa pane yakaderera tembiricha uye nekukurumidza kupisa kune mhinduro tembiricha.
• 2) Solid solution + kudzikamisa kurapwa. Mushure mekugadzirisa mhinduro yakasimba yechinhu chinonzi chiwanikwa senge titanium bismuth, inofanirwa kugadzikiswa. Ndokunge, kuraswa kunodzokororwa kusvika 850-930 ° C uye nekukurumidza kukasira. Kuitira kudzivirira kunaya kwechromium carbide, kunatsiridza kuramba kune intergranular ngura.

Kunonaya kuomesa ngura inodzivirira simbiiyo yakajairwa simbi giredhi ndeye ZGCr17Ni4Cu2. Iyo yekurapa yekupisa nzira yakasimba mhinduro + kukwegura kusimbisa, mhinduro tembiricha iri 1020-1060 ° C, uye zera kuomesa tembiricha iri 560-650 ° C.

Ngura inodzivirira simbi, isina ngura inodzivirira simbi ine chinhu chimwe chete senge silicon, aluminium, chromium, nickel kana chinhu chinoumbwa chinoumbwa navo. Kuti uvandudze zvakakwana zvemuchina zvivakwa, zvinowedzeredza zvinhu zvakaita semhangura nepasi pasingawanzo kuwanikwa zvinowanzo wedzerwa, uye zvinhu zvakadaro zvakaomarara uye ngura zvinodzivirira zvinhu. Iyo yekupisa nzira yekurapa ndeyekubvisa kunetseka kwemukati uye kudzikira kwekushisa tembiricha

Batanidza kuchinyorwa ichi: Metallurgical tekinoroji yengura inodzivirira simbi chiwanikwa castings

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