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Cu-Added Ni-Cr-Fe-Based Alloy Brazing Material

a technology of fe-based alloy brazing and cu-added ni-cr-fe-based alloy, which is applied in the direction of manufacturing tools, solvents, other domestic objects, etc., can solve the problem of relatively less available materials, and achieve excellent corrosion resistance and strength, and low melting temperature

Inactive Publication Date: 2016-06-23
SANYO SPECIAL STEEL COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new brazing filler material made of a Ni-Cr-Fe-based alloy with added copper that has excellent corrosion resistance and strength. This material has a low melting point and is inexpensive, making it ideal for use in the manufacturing of stainless-steel heat exchangers and other similar products. Overall, the patent provides a solution for meeting the high strength requirements of modern brazing materials while still maintaining their low-temperature melting point and affordability.

Problems solved by technology

However, a Ni—P alloy base material is used for adding P, and the base material is relatively less available to thereby raise a supply concern.

Method used

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examples

[0067]The present invention is explained in detail below with reference to examples.

[0068]First, in order to examine in detail the amount of added Cu influencing various properties including bending strength, the bending strength, liquidus line, and solidus line of Ni-30% Cr-20% Fe-x % Cu-7% P-3% Si were evaluated with a test piece cut out of a produced centrifugal cast steel. Furthermore, SUS304 as a base material was brazed with a specimen cut out of the centrifugation cast steel. The bending strength and corrosion resistance of the brazed test piece were evaluated (Experiment A).

[0069]Then, centrifugal cast steels in which each alloy composition was varied were produced, the bending strength, liquidus line, and solidus line of a test piece cut out of each centrifugal cast steel were evaluated, and the bending strength and corrosion resistance of a test piece obtained by brazing SUS304 as a base material with a specimen cut out of the centrifugal cast steel were evaluated (Experim...

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Abstract

There is provided a Ni—Cr—Fe-based alloy brazing filler material to which Cu is added, and which has a low melting temperature, and is inexpensive and excellent in corrosion resistance and in strength, for use in manufacture of stainless-steel heat exchangers or the like, specifically, a Ni—Cr—Fe-based alloy brazing filler material, including, in mass %, Cr: 15 to 30%; Fe: 15 to 30%; Cu: 2.1 to 7.5%; P: 3 to 12%; and Si: 0 to 8%; and the balance being Ni and unavoidable impurities, wherein the total content of Cr and Fe is 30 to 54%, and the total content of P and Si is 7 to 14%.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of priority from Japanese Patent Application No. 2013-162961 filed on Aug. 6, 2013, and Japanese Patent Application No. 2014-123074 filed on Jun. 16, 2014, the entire disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a Ni—Cr—Fe-based alloy brazing filler material to which Cu is added, and which has a low melting temperature, and is inexpensive and excellent in corrosion resistance and in strength, for use in manufacture of stainless-steel heat exchangers or the like.[0004]2. Background Art[0005]Ni-based alloy brazing filler materials superior in corrosion resistance and oxidation resistance have been conventionally used for brazing stainless steel, and in particular, BNi-2 (Ni—Cr—Fe—B—Si alloy), BNi-5 (Ni—Cr—Si alloy), and BNi-7 (Ni—Cr—P alloy) as JIS standards have been frequently used. The a...

Claims

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Application Information

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IPC IPC(8): B23K35/30C22C30/02C22C19/05
CPCB23K35/304C22C19/058B23K35/30B23K35/3033C22C30/02B23K35/0222B23K2101/14C22C19/05C22C19/055C22C19/056C22C30/04C22C30/06
Inventor SAWADA, TOSHIYUKIFUKUMOTO, SHINGO
Owner SANYO SPECIAL STEEL COMPANY
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