scholarly journals Prevent Cracking in Deposition of Carbon Steel on Inconel 625

2019 ◽  
Vol 269 ◽  
pp. 03011
Author(s):  
M. A. Morsy ◽  
M. R. El Koussy ◽  
M. M. Farag
Keyword(s):  
Carbon Steel ◽  
Base Alloy ◽  
Inconel 625 ◽  
Dilution Method ◽  
Type Ii ◽  
Grain Refining ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Clad Steel ◽  
Welding Procedure

Welding procedure of clad steel including deposition of carbon steel on nickel base alloy usually gives unaccepted mechanical properties. Cracks were formed along type II boundary in nickel base alloy pass and a martensitic layer was formed in carbon steel pass. In this paper, cracks along type II boundary were prevented by lowering the martensitic start temperature (TMs) of the martensitic layer. Decreasing of TMs was obtained by two methods: Dilution method and Grain refining method. Three levels of TMs (approximately 350, 200, and 50⁰C) are obtained. The results showed that: cracks along type II boundary were prevented at TMs lower than 200⁰C; however type II boundary itself was prevented at TMs lower than 50𠜌. Also post weld heat treatment was necessary to achieve accepted impact properties.

SANDVIK SANICRO 38/4L7

Alloy Digest ◽  
1996 ◽  
Vol 45 (8) ◽  
Keyword(s):  
Carbon Steel ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Corrosion Resistant ◽  
Composite Tube ◽  
Nickel Base ◽  
Outside Diameter

Abstract Sandvik Sanicro 38/4L7 is a composite tube consisting of Sanicro 38, a corrosion-resistant nickel-base alloy on the outside diameter, and carbon steel (A210 GrA-1) for water-wetted service on the inside. The design is placed entirely on the inside tube; however, there is a contribution from both. This datasheet provides information on composition and physical properties. It also includes information on forming, heat treating, and joining. Filing Code: SA-483. Producer or source: Sandvik.

Microstructure of Bare and Sol–Gel Alumina-Coated Nickel-Base Alloy Inconel 625 After Long-Term Oxidation at 900 °C

2019 ◽  
Vol 91 (3-4) ◽  
pp. 395-416 ◽  
Author(s):  
M. Nofz ◽  
I. Dörfel ◽  
R. Sojref ◽  
R. Saliwan Neumann
Keyword(s):  
Base Alloy ◽  
Sol Gel ◽  
Inconel 625 ◽  
Nickel Base Alloy ◽  
Nickel Base

The Nature of Delta Phase Precipitation in Inconel 718

1982 ◽  
Vol 40 ◽  
pp. 724-725
Author(s):  
L. S. Lin ◽  
C. C. Law
Keyword(s):  
Inconel 718 ◽  
Base Alloy ◽  
High Strength ◽  
Physical Metallurgy ◽  
Nickel Base Alloy ◽  
Phase Precipitation ◽  
Weight Percentage ◽  
Delta Phase ◽  
The Subject ◽  
Nickel Base

Inconel 718, a precipitation hardenable nickel-base alloy, is a versatile high strength, weldable wrought alloy that is used in the gas turbine industry for components operated at temperatures up to about 1300°F. The nominal chemical composition is 0.6A1-0.9Ti-19.OCr-18.0Fe-3Mo-5.2(Cb + Ta)- 0.1C with the balance Ni (in weight percentage). The physical metallurgy of IN 718 has been the subject of a number of investigations and it is now established that hardening is due, primarily, to the formation of metastable, disc-shaped γ" an ordered body-centered tetragonal structure (DO2 2 type superlattice).

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