Mar 15, 2024 Tinggalkan pesanan

Inconel751 (N07751) pengerasan kerpasan aloi suhu tinggi

Inconel751 (N07751) pengerasan kerpasan aloi suhu tinggi

 

Inconel 751/ Aloi 751/2.4694/ N07751
komposisi kimia
C(%): Kurang daripada atau sama dengan 0.10
Si(%): Kurang daripada atau sama dengan 0.01
Mn(%): Kurang daripada atau sama dengan 1.00
Cr(%): 14.0-17.0
Ni(%): Lebih besar daripada atau sama dengan 70.0
Mo(%): -
Co(%): -
W(%): -
Al(%): 0.90-1.50
Cu(%): Kurang daripada atau sama dengan 0.50
Ti(%): 2.00-2.60
Fe(%): 5.00-9.00
Lain-lain (%): Nb {{0}}.70-1.20, S Kurang daripada atau sama dengan 0.01, Nb 2.50-3.50

Inconel751 (N07751) precipitation hardening high temperature alloy

Inconel751 (N07751) precipitation hardening high temperature alloy

Inconel 751 ialah aloi suhu tinggi pengerasan kerpasan serupa dengan 750. Ia mempunyai rintangan haus yang baik, kekuatan yang baik, rintangan kakisan dan kekerasan panas pada suhu tinggi. Digunakan untuk injap ekzos pada enjin pembakaran dalaman, dsb.
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 darjah, manakala aloi nikel adalah kira-kira 950 darjah, aloi berasaskan besi adalah<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.
Kelebihan aloi nikel yang disebutkan di atas adalah berkaitan dengan beberapa sifat unggulnya. Nikel ialah kiub berpusat muka dengan struktur yang sangat stabil dan tidak mengalami perubahan alotropik dari suhu bilik ke suhu tinggi; ini sangat penting untuk pemilihan bahan matriks. Telah diketahui umum bahawa struktur austenit mempunyai beberapa kelebihan berbanding struktur ferit.
Nikel mempunyai kestabilan kimia yang tinggi, hampir tiada pengoksidaan di bawah 500 darjah, dan tidak terjejas oleh udara suam, air dan larutan akueus garam tertentu pada suhu akademik. Nikel larut perlahan dalam asid sulfurik dan asid hidroklorik, tetapi larut dengan cepat dalam asid nitrik.
Nikel mempunyai keupayaan mengaloi yang hebat, dan tiada fasa berbahaya akan muncul walaupun lebih daripada sepuluh unsur pengaloian ditambah, yang memberikan kemungkinan potensi untuk menambah baik pelbagai sifat nikel.

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