Inconel751 (N07751) dyodiad caledu aloi tymheredd uchel
Inconel 751/ Aloi 751/2.4694/ N07751
cyfansoddiad cemegol
C(%): Llai na neu'n hafal i 0.10
Si(%): Llai na neu'n hafal i 0.01
Mn(%): Llai na neu'n hafal i 1.00
Cr(%): 14.0-17}.{0
Ni(%): Yn fwy na neu'n hafal i 70.0
Mo(%): -
Co(%):-
W(%): -
Al (%): 0}.90-1.50
Cu(%): Llai na neu'n hafal i 0.50
Ti(%): 2.00-2.60
Fe(%): 5.{00-9.{00
Eraill (%): Nb {{0}}.70-1.20, S Llai na neu'n hafal i 0.01, Nb 2.50-3.50
Mae Inconel 751 yn aloi tymheredd uchel sy'n caledu dyddodiad tebyg i 750. Mae ganddo wrthwynebiad gwisgo da, cryfder da, ymwrthedd cyrydiad a chaledwch poeth ar dymheredd uchel. Defnyddir ar gyfer falfiau gwacáu ar beiriannau hylosgi mewnol, ac ati.
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 gradd, tra bod aloion nicel tua 950 gradd, aloion sy'n seiliedig ar haearn yw<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.
Mae manteision aloi nicel uchod yn gysylltiedig â rhai o'i briodweddau rhagorol. Mae nicel yn giwb wyneb-ganolog gyda strwythur sefydlog iawn ac nid yw'n cael ei drawsnewid yn allotropig o dymheredd ystafell i dymheredd uchel; mae hyn yn bwysig iawn ar gyfer dewis y deunydd matrics. Mae'n hysbys bod gan strwythur austenite gyfres o fanteision dros strwythur ferrite.
Mae gan nicel sefydlogrwydd cemegol uchel, bron dim ocsidiad o dan 500 gradd, ac nid yw aer cynnes, dŵr a rhai toddiannau dyfrllyd halen yn effeithio arno ar dymheredd academaidd. Mae nicel yn hydoddi'n araf mewn asid sylffwrig ac asid hydroclorig, ond mae'n hydoddi'n gyflym mewn asid nitrig.
Mae gan nicel allu aloi gwych, ac ni fydd unrhyw gamau niweidiol yn ymddangos hyd yn oed pan ychwanegir mwy na deg elfen aloi, sy'n darparu posibiliadau posibl ar gyfer gwella priodweddau amrywiol nicel.
