Cóimhiotal ardteochta cruaite deascadh Inconel751 (N07751).
Inconel 751/ Cóimhiotal 751/2.4694/ N07751
comhdhéanamh ceimiceach
C(%): Níos lú ná nó cothrom le 0.10
Si(%): Níos lú ná nó cothrom le 0.01
Mn(%): Níos lú ná nó cothrom le 1.00
Cr(%): 14.0-17.0
Ni(%): Níos mó ná nó cothrom le 70.0
Mo(%): -
Co(%):-
W(%): -
Al(%): 0.90-1.50
Cu(%): Níos lú ná nó cothrom le 0.50
TI(%): 2.00-2.60
Fe(%): 5.00-9.00
Daoine eile (%): Nb {{0}}.70-1.20, S Níos lú ná nó cothrom le 0.01, Nb 2.50-3.50
Is cóimhiotal ardteochta cruaite deascadh é Inconel 751 cosúil le 750. Tá friotaíocht caitheamh maith, neart maith, friotaíocht creimeadh agus cruas te ag teocht ard. Úsáidtear é le haghaidh comhlaí sceite ar innill dócháin inmheánaigh, etc.
High-temperature alloy refers to a type of metal material based on iron, nickel, and cobalt that can work at high temperatures above 600°C and under certain stress for a long time; and has high high-temperature strength, good anti-oxidation and anti-corrosion properties, Good fatigue performance, fracture toughness and other comprehensive properties. High-temperature alloys have a single austenite structure and have good structural stability and reliability at various temperatures. Based on the above performance characteristics, and the high degree of alloying of high-temperature alloys, they are also called "superalloys". An important material widely used in aviation, aerospace, petroleum, chemical industry, and ships. According to the matrix elements, high-temperature alloys are divided into iron-based, nickel-based, cobalt-based and other high-temperature alloys. The service temperature of iron-based high-temperature alloys can generally only reach 750~780°C. For heat-resistant parts used at higher temperatures, nickel-based and refractory metal-based alloys are used. Nickel-based high-temperature alloys occupy a particularly important position in the entire field of high-temperature alloys. They are widely used to manufacture the hottest components of aviation jet engines and various industrial gas turbines. If 150MPA-100H durability strength is used as the standard, the current maximum temperature that nickel alloys can withstand is >1100 céim , cé go bhfuil cóimhiotail nicil thart ar 950 céim , tá cóimhiotail iarainn-bhunaithe<850℃, that is, nickel-based alloys are correspondingly 150℃ higher. to about 250℃. So people call nickel alloy the heart of the engine. At present, in advanced engines, nickel alloys account for half of the total weight. Not only turbine blades and combustion chambers, but also turbine disks and even later compressor blades have begun to use nickel alloys. Compared with iron alloys, the advantages of nickel alloys are: higher working temperature, stable structure, fewer harmful phases, and greater resistance to oxidation and corrosion. Compared with cobalt alloys, nickel alloys can operate at higher temperatures and stresses, especially in moving blade applications.
Baineann na buntáistí thuasluaite a bhaineann le cóimhiotal nicil le cuid dá airíonna den scoth. Is ciúb aghaidh-lárnach é nicil le struchtúr an-chobhsaí agus ní dhéantar claochlú allotrópach ó theocht an tseomra go teocht ard; tá sé seo an-tábhachtach chun an t-ábhar maitrís a roghnú. Tá a fhios go maith go bhfuil sraith buntáistí ag struchtúr austenític thar struchtúr ferrite.
Tá cobhsaíocht cheimiceach ard ag nicil, beagnach aon ocsaídiú faoi bhun 500 céim, agus níl tionchar ag aer te, uisce agus réitigh uiscí salainn áirithe ag teocht acadúil. Díscaoileann nicil go mall in aigéad sulfarach agus aigéad hidreaclórach, ach tuaslagann sé go tapa in aigéad nítreach.
Tá cumas cóimhiotal iontach ag nicil, agus ní bheidh aon chéim díobhálach le feiceáil fiú nuair a chuirtear níos mó ná deich n-eilimint chóimhiotalach leis, rud a thugann féidearthachtaí féideartha chun airíonna éagsúla nicil a fheabhsú.
