Ni-cr-based alloy brazing material containing a small amount of v
A technology of base alloy and brazing material, applied in the field of Ni-Cr based alloy brazing material, can solve the problems of not necessarily sufficient corrosion resistance, high brazing temperature, etc., achieve excellent strength, low melting temperature, and reduce brazing The effect of defects
Active Publication Date: 2021-08-06
SANYO SPECIAL STEEL COMPANY
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Problems solved by technology
For example, the liquidus temperature of BNi-2 is about 1000°C, which is relatively low, but the corrosion resistance is not necessarily sufficient. BNi-5 has excellent corrosion resistance, but the liquidus temperature is about 1140°C, and high brazing is required. temperature
In addition, the liquidus temperature of BNi-7 is about 900°C, which is very low, and the corrosion resistance is relatively excellent, but expensive raw materials are required
Method used
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Embodiment
[0060] Hereinafter, the present invention will be specifically described using examples. First, in order to evaluate the influence of the most important V amount, Nb amount and formulas (1) and (2) on residual pores and other characteristics in the present invention, as shown in Tables 1 and 2, Ni(bal.)-29 %Cr-6%P-4%Si, Ni(bal.)-25%Cr-11%P-0.05%Ti-0.005%Al, Ni(bal.)-16%Cr-4%P-0.05%Ti -0.04%Zr-0.009%Al as the basic composition, the alloy samples (No.1-53) with the composition of C, V, Nb and the formula (1) and (2) changed, and the characteristics of the alloy samples were evaluated .
[0061] Next, alloy samples (Nos. 54 to 99) having the composition shown in Tables 3 and 4 were produced, and the effects of the above-mentioned elements on various characteristics were evaluated.
[0062] Production of samples (centrifugal casting materials) of the examples of the present invention and comparative examples and evaluation of various characteristics were performed as follows.
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Abstract
The present invention provides a Ni-Cr-based alloy brazing material, which comprises in mass %: Cr: more than 15% and less than 30%, P: more than 3% and less than 12%, Si: less than 8% (including 0%) ), C: more than 0.01% and less than 0.06%, Ti+Zr: less than 0.1% (including 0%), V: more than 0.01% and less than 0.1%, Al: less than 0.01% (including 0%), O: more than 0.005 % and less than 0.025%, N: more than 0.001% and less than 0.050%, and Nb: less than 0.1% (including 0%), the balance is composed of Ni and unavoidable impurities, and the formula (1) is satisfied when Nb is not added: 0.2 ≤0.24V% / C%≤1.0, and the formula (2) is satisfied when Nb is added: 0.2≤(0.24V%+0.13Nb%) / C%≤1.0. According to the present invention, a Ni-Cr-based alloy brazing material to which a small amount of V is added can be obtained, which is used for manufacturing stainless steel heat exchangers and the like, has a low melting temperature, is inexpensive, and is excellent in corrosion resistance and strength.
Description
technical field [0001] The present invention relates to a Ni-Cr-based alloy brazing material, and particularly relates to a Ni-Cr-based alloy brazing material used for manufacturing stainless steel heat exchangers and the like. Background technique [0002] In the past, the brazing of stainless steel used Ni-based alloy brazing materials with excellent corrosion resistance and oxidation resistance. In particular, BNi-2 (Ni-Cr-Fe-B-Si alloy) and BNi- 5 (Ni-Cr-Si alloy), BNi-7 (Ni-Cr-P alloy). The above three kinds of Ni-based brazing materials have their own advantages and disadvantages, and they are used according to the application. For example, the liquidus temperature of BNi-2 is about 1000°C, which is relatively low, but the corrosion resistance is not necessarily sufficient. BNi-5 has excellent corrosion resistance, but the liquidus temperature is about 1140°C, and high brazing is required. temperature. In addition, BNi-7 has a very low liquidus temperature of about ...
Claims
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IPC IPC(8): B23K35/30C22C19/05B23K1/00
CPCB23K35/304B23K35/3033C22C19/058C22C19/056C22C19/055B23K1/0012B23K1/19B23K1/008B23K2101/14B23K2101/006B23K2103/05B23K1/00B23K35/30C22C19/051B23K1/002
Inventor 泽田俊之福本新吾
Owner SANYO SPECIAL STEEL COMPANY