High Cr Ni-based alloy welding wire, shielded metal arc welding rod, and weld metal formed by shielded metal arc welding

Patent metadata

Field	Value
Publication number	US-10675720-B2
Application number	US-201213982878-A
Country	US
Kind code	B2
Filing date	Jan 27, 2012
Priority date	Feb 1, 2011
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

Provided is a high Cr Ni-based alloy welding wire with which tensile strength and weld cracking resistance of a welded portion, the integrity of the microstructure of a welded metal, and inhibition of scale generation are improved. The high Cr Ni-based alloy welding wire is configured to have an alloy composition comprising, by mass, C: 0.04% or less, Mn: 7% or less, Fe: 1 to 12%, Si: 0.75% or less, Al: 0.01 to 0.7%, Ti: 0.01 to 0.7%, Cr: 25.0 to 31.5%, Ta: 1 to 10%, and Mo: 1 to 6%, and as inevitable impurities, Ca+Mg: less than 0.002%, N: 0.1% or less, P: 0.02% or less, O: 0.01% or less, S: 0.0015% or less, H: 0.0015% or less, Cu: 0.08% or less, and Co: 0.05% or less, and the balance: Ni. Then, the high CrNi-based alloy welding wire is configured such that the contents of S, Ta, Al, and Ti satisfy the following relation (1) and the contents of Ta, Mo, and N satisfy the following relation (2):

12000S+0.58Ta−2.6Al−2Ti£19.3  (1)

Ta+1.6Mo+187N 3 5.7  (2).

First claim

The invention claimed is:

1. A high Cr Ni-based alloy welding wire comprising, by mass, C: 0.006% to 0.04%, Mn: 0.05% to 7%, Fe: 1 to 12%, Si: 0.05% to 0.75%, Al: 0.01 to 0.7%, Ti: 0.01 to 0.7%, Cr: 25.0 to 31.5%, Ta: 1 to 10%, Nb: 0%, and Mo: 1 to 6%, and as inevitable impurities, Ca+Mg: less than 0.002%, N: 0.1% or less, P: 0.02% or less, O: 0.01% or less, S: 0.0015% or less, H: 0.0015% or less, Cu: 0.08% or less, and Co: 0.05% or less, and the balance: Ni, contents of S, Ta, Al, and Ti satisfying the following relation (1) and contents of Ta, Mo, and N satisfying the following relation (2):
12000S+0.58Ta−2.6Al−2Ti≤19.3  (1)

Ta+1.6Mo+187N≥5.7  (2).

2. The high Cr Ni-based alloy welding wire according to claim 1 , wherein the content of Al is 0.26 to 0.7 mass %.

3. The high Cr Ni-based alloy welding wire according to claim 1 , wherein the content of Ti is 0.36 to 0.7 mass %.

4. The high Cr Ni-based alloy welding wire according to claim 1 , further comprising, by mass, at least one element selected from B, Zr, and rare earth elements: 0.0065% to 0.02%.

5. The high Cr Ni-based alloy welding wire according to claim 1 , wherein the content of Ca+Mg is 0.0016% or less.

6. A high Cr Ni-based alloy welding wire comprising, by mass, C: 0.006% to 0.04%, Mn: 0.05% to 7%, Fe: 1 to 12%, Si: 0.05% to 0.75%, Al: 0.01 to 0.7%, Ti: 0.01 to 0.7%, Cr: 25.0 to 31.5%, Ta: 1 to 10%, Nb: 0%, and Mo: 1 to 6%, and as inevitable impurities, N: 0.1% or less, P: 0.02% or less, O: 0.01% or less, S: 0.0015% or less, H: 0.0015% or less, Cu: 0.08% or less, and Co: 0.05% or less, and the balance: Ni, wherein Ca and Mg are not present in detectable amounts, contents of S, Ta, Al, Ti, Mo, and N satisfying the following relations (1) and (2):
12000S+0.58Ta−2.6Al−2Ti≤19.3  (1)

Ta+1.6Mo+187N≥5.7  (2).

7. The high Cr Ni-based alloy welding wire according to claim 6 , wherein the content of Al is 0.26 to 0.7 mass %.

8. The high Cr Ni-based alloy welding wire according to claim 6 , wherein the content of Ti is 0.36 to 0.7 mass %.

9. The high Cr Ni-based alloy welding wire according to claim 6 , further comprising, by mass, at least one element selected from B, Zr, and rare earth elements: 0.001% to 0.02%.

Assignees

• Kawasaki Kenji
• Kawaguchi Seiichi
• Toyoda Masahiko
• Asada Seiji
• Konishi Akira
• Sano Yusuke
• Takatsu Tamao
• Saito Teiichiro
• Sango Tetsuya
• Ogawa Norihito
• Mitsubishi Heavy Ind Ltd
• Nippon Welding Rod Co Ltd

Inventors

• Kawasaki Kenji
• Kawaguchi Seiichi
• Toyoda Masahiko
• Asada Seiji
• Konishi Akira
• Sano Yusuke
• Takatsu Tamao
• Saito Teiichiro
• Sango Tetsuya
• Ogawa Norihito

Classifications

• B23K35/304 Primary

  with Cr as the next major constituent · CPC title

• B23K35/3033

  Ni as the principal constituent · CPC title

• C22C19/05

  with chromium · CPC title

• B23K35/0261 Primary

  Rods, electrodes or wires · CPC title

• B23K35/30

  with the principal constituent melting at less than 1550°C · CPC title