Cima Ukuphonsa Okupholile Kwabahambisi Bethusi

Ngenxa yokushisa okuphansi kwesihlabathi sokubumba, ophephela abakhulu abanesisindo samashumi amathani bangapholiswa izinsuku ezimbalwa. Izinga lokupholisa le- machining castings iyanensa, futhi izici zemishini namandla okukhathala okugqwala akha umphumela wekhwalithi ancipha kakhulu. 

Izakhiwo zemishini namandla okukhathala kokugqwala kwemiphumela yekhwalithi ekhethekile ancishiswa kakhulu. Ikakhulukazi ezizungeze i-0.2 ~ 0.3R ye-airfoil enokucindezeleka okukhulu kokusebenza, ubukhulu be-airfoil (ngaphandle kwehabhu) bukhulu kunezinye izingxenye, ngakho amandla okukhathala okugqwala aphindaphindiwe 2x107, 18kgf / mm2, nobubanzi obungaphezu 6000mm isisindo samathani angamashumi amabili. Okwezinga elikhulu ukuhambisa umkhumbi ama-castings, amandla okukhathala okugqwala empandeni yephiko awela ku-2x107; 10 ~ 20 kgf / mm2. Isizathu siwukuthi isivinini sokuphonsa siphakathi kuka-1000 ° C no-700 ° C. Kuma-propeller amakhulu, izinga lokupholisa lingaba ngu-0.1 ° C / min. 

Ngakho-ke, izinhlanganisela zensimbi ze-Al, i-Ni, ne-Fe (ezifana ne-FeAl, i-NiAl, njll.) ezilawula izakhiwo zemishini ye-nickel-aluminium bronze alloys zine-agglomeration Ngaphezu kwalokho, i-nickel-aluminium bronze castings izwela ukumuncwa kwe-hydrogen ngesikhathi inqubo yokuncibilika, kanye nokupholisa okunensayo kokusakazwa okukhulu kunamathuba amaningi okukhiqiza ukukhubazeka kwe-hydrogen.

Ngakho-ke, indlela entsha yokusakaza ibonakala nge:

• 1. Mayelana nephesenti lesisindo sokwakheka kwamakhemikhali kokuqukethwe: i-aluminium 8.5 ~ 10.5%, i-nickel 4 ~ 6%, i-iron 4 ~ 6%, i-manganese 4% noma ngaphansi, ithusi nokungcola okuvamile
• 2. Ngesikhathi sokusakaza, ngemuva kokuphonsa ingxubevange yethusi encibilikisiwe kwisikhunta esingalawula izinga lokupholisa, izinga lokupholisa lilawulwa phakathi kuka-1000 ~ 700 ℃, 5 ℃ / min; ngaphansi kuka-700 ℃, 1 ℃ / min.

Le ndlela yokuphonsa ihlukile kusikhunta sesihlabathi kanye nokupholisa umoya nge-conductivity ephansi ye-thermal esikhathini esidlule. Esikhundleni salokho, isebenzisa izinhlayiya zensimbi ezine-thermal conductivity izikhathi ezingu-20 kuya kwezingu-30 ngaphezu kwesihlabathi, futhi ishumeka ngamanzi apholisa. Ngaphezu kwalokho, ngaphambi kokuthululwa, indlela yokupholisa ngenkani ingxube yethusi encibilikisiwe enokwakheka kwamakhemikhali okunqunywe kusengaphambili ngenkathi amanzi okupholisa esikhunjini athululelwa futhi ukupholisa okuphoqelekile kwenziwa. 

Izinga lokupholisa liphakeme kakhulu kunalelo lendlela yokuphonsa evamile, evimbela ngempumelelo ukuwohloka kwamandla okukhathala okugqwalile kanye nezakhiwo zemishini ezakha umphumela wekhwalithi.

Le ndlela yokuphonsa ibeka ukuthi izinga lokupholisa eliphakathi kuka-1000 no-700 ° C lingu-5 ° C / min noma ngaphezulu, ngoba izinga lokupholisa alinabo ubudlelwano nemvula nokukhula kwemvula engaphezu kuka-1000 ° C, kanye nemvula (FeAl, NiAl phakathi kuka-1000 no-700 ° C) Njll.) 

Imvula kanye nezinga lokushisa lokukhula; ngaphansi kuka-700 ° C, izinhlamvu zekristalu cishe azibe zisakhula, futhi izinga lokupholisa okungenzeka libe khona ngaphansi kwalesi simo sezulu kufanele libe nenani elilinganiselwe ukuze likhule libe usayizi ofanele. Umkhawulo ongaphezulu wezinga lokupholisa awucaciswanga ngoba umumo wokulingisa uyahlukahluka, futhi kuhle ukuthi u-5 ° C/min noma ngaphezulu wanele ukulawula ukukhula kwezimvula. Izinga lokupholisa elingaphansi kuka-700 ° C licaciswe ukuthi libe ngaphansi kuka-1 ° C/min, ukuze kuguqulwe isigaba sika-β esikhiqizwa ukupholisa okusheshayo ngaphezu kuka-1000 ° C kuya ku-5 ° C / iminithi phakathi kuka-1000 ° C no-700 ° C sibe i-α isigaba, ukuqinisekisa ukuqina kwento, kanye nokuvumela izakhi zengxubevange ukuthi zisakazeke ngokwanele ukuze kuzuzwe i-homogeneity yezinto. 

Awukho umkhawulo ophansi wezinga lokupholisa elingaphansi kuka-700 ° C. Ngokwemvelo, izinga lokupholisa liyahlukahluka ngesimo sokubunjwa. Uma izinga lokupholisa lingaphansi kuka-1 ° C/min, ukuguqulwa kwesigaba se-α kungaba okwanele futhi amandla okukhathala okugqwala aphezulu angatholakala. Ngale ndlela yokuphonsa, ukukhishwa akudingi ukuphathwa ngokushisa futhi ekushiseni okuphezulu, kugwema izinkinga ze-oxidation kanye nokuguqulwa okubangelwa ukwelashwa kokushisa, futhi konga amandla.

Xhumanisa nale ndatshana: Cima Ukuphonsa Okupholile Kwabahambisi Bethusi

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