What is the welding material of superalloy GH3030

  GH3030 chemical composition GH30 hardness GH3030 superalloy after cryogenic treatment is an early developed 80ni-20cr solid solution strengthened superalloy
It has simple chemical composition, electric arc furnace melting or electric arc furnace melting plus electroslag remelting or vacuum arc remelting, non vacuum induction furnace plus electroslag melting or vacuum electric arc furnace remelting or vacuum duplex process
It has satisfactory thermal strength and high plasticity below 800 ℃, and has good oxidation resistance, thermal fatigue, cold stamping and welding process properties
The alloy is single-phase austenite after solution treatment, and the structure is stable during use
It is mainly used for turbine engine combustion chamber components working below 800 ℃ and other high-temperature components requiring oxidation resistance but bearing little load below 1100 ℃
It has been tested for a long time in aeroengine, mainly used for combustion chamber and afterburner parts, as well as gearbox mounting edge and other parts

 
 
Physical properties: the melting temperature is in the range of 1374 ~ 1420 ℃; When the working temperature is 100, 200, 300, 400, 500, 600, 700, 800 and 900 ℃, the corresponding thermal conductivity is lambda; 15
1, 16
3, 18
0, 19
3, 20
9, 22
2, 23
4, 25
1, 26
4 w / (M & middot; ℃); When the operating temperature is 150, 200, 300, 400, 500 and 600 ℃, the corresponding specific heat capacity C is 565
2, 598
7, 674
1, 741
1, 820
6 and 971
3 J / (kg
K)

GH3030 nickel based high temperature chemical properties:
Note: 1 Bar and ring billet standard, ≤ 0
20 Cu; Standards for hot rolled plate, cold rolled plate, cold rolled strip, pipe, wire and cold drawn wire for cold heading, ≤ 1
00 Fe、≤ 0
015 P、≤ 0
010 S、≤ 0
001 Pb、≤ 0
007 Cu。
Heat treatment: the solid solution temperature is 980 ~ 1020 ℃, the hot-rolled plate, cold-rolled sheet and ring billet are air-cooled, the cold heading wire and cold drawn bar are water-cooled or air-cooled, and the pipe is water-cooled

 
Supply status: deformed products of various specifications, bars and ring billets are delivered without heat treatment; Hot rolled plate, cold rolled sheet and pipe are supplied after solid solution and pickling; The welding wire shall be delivered in disk shape in cold drawn state, solid solution and pickling state or semi-hard state; Wire for cold heading shall be delivered in the form of disk or straight strip in the state of solid solution and pickling, solid solution straight strip polishing or cold drawing; Pipes shall be delivered in solid solution and pickling state; The cold drawn bar shall be delivered in the state of annealing, annealing plus pickling, annealing plus polishing or cold drawing

 
GH3030 conclusion:
At present, the research on cryogenic treatment mainly focuses on magnesium alloy, aluminum alloy and titanium alloy, but there are few reports on cryogenic treatment of superalloys
The previous research results show that although GH3030 superalloy with high hardness can be obtained after single-step cryogenic treatment or multiple cryogenic heat treatment cycles, it takes a long time
In order to shorten the process time and improve the production efficiency, heat treatment and cryogenic treatment are combined to form high temperature gradient and large impact cryogenic treatment, so as to obtain GH3030 material with excellent mechanical properties such as hardness in a shorter time