阅读说明：本技术 一种钎焊组合物及其制备方法 (Brazing composition and preparation method thereof ) 是由 蓝添财 于 2021-09-11 设计创作，主要内容包括：本发明公开了一种钎焊组合物,该钎焊组合物由A组分、B组分、C组分以及D组分加工组成,其中A组分包括铝基钎料、铜基钎料、锰基钎料、镍基钎料,B组分包括硼砂、硼酸、氟化物、活性二氧化硅,C组分包括锂、硼、磷、松香酒精溶液,D组分包括氧化锌、氯化铵、凡士林、纳米硼酸锌；所述A组分制成钎焊基料；所述B组分制成钎焊加强料；所述C组分制成润湿剂；所述D组分制成辅助钎剂；由上述材料制备的钎焊组合物成本低、适用范围广、加工难度低,有利于钎焊接头组织细化、提高接头强度,且在钎焊过程中能够有效去除氧化膜并提高润湿性能,该钎焊组合物不含有贵金属、毒元素,符合环保要求。(The invention discloses a brazing composition, which is formed by processing a component A, a component B, a component C and a component D, wherein the component A comprises an aluminum-based brazing filler metal, a copper-based brazing filler metal, a manganese-based brazing filler metal and a nickel-based brazing filler metal, the component B comprises borax, boric acid, fluoride and active silicon dioxide, the component C comprises lithium, boron, phosphorus and rosin alcohol solution, and the component D comprises zinc oxide, ammonium chloride, vaseline and nano zinc borate; the component A is prepared into a brazing base material; the component B is prepared into a brazing reinforcing material; preparing the component C into a wetting agent; the component D is prepared into auxiliary soldering flux; the brazing composition prepared from the materials has the advantages of low cost, wide application range and low processing difficulty, is beneficial to refining the structure of a brazed joint and improving the joint strength, can effectively remove an oxidation film and improve the wettability in the brazing process, does not contain noble metals and toxic elements, and meets the requirement of environmental protection.)

1. A brazing composition is characterized by being formed by processing a component A, a component B, a component C and a component D, wherein the component A comprises an aluminum-based brazing filler metal, a copper-based brazing filler metal, a manganese-based brazing filler metal and a nickel-based brazing filler metal, the component B comprises borax, boric acid, fluoride and active silicon dioxide, the component C comprises lithium, boron, phosphorus and rosin alcohol solution, and the component D comprises zinc oxide, ammonium chloride, vaseline and nano zinc borate; the component A is prepared into a brazing base material; the component B is prepared into a brazing reinforcing material; preparing the component C into a wetting agent; and the component D is prepared into auxiliary soldering flux.

2. The component A comprises the following materials in parts by weight: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal;

the component B comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide;

the C component comprises the following materials in parts by weight: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution;

the D component comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate;

a brazing composition according to claim 1, wherein: the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal are all powdery brazing filler metals and are prepared by a gas atomization powder preparation method.

3. A brazing composition according to claim 1, wherein: the fluoride comprises 20-40 parts of sodium fluoride, 10-20 parts of tetrabutylammonium fluoride and 5-15 parts of fluoborate.

4. A brazing composition according to claim 3, wherein: the fluoride comprises 30 parts of sodium fluoride, 15 parts of tetrabutylammonium fluoride and 10 parts of fluoborate.

5. A brazing composition according to claim 1, wherein: the component A comprises the following materials in parts by weight: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal; the component B comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide; the C component comprises the following materials in parts by weight: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution; the D component comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate.

6. A method of making a brazing composition, wherein the brazing composition of any one of claims 1 to 5 is processed to produce a brazing composition, the method comprising the steps of:

step 1: the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal are placed into a reaction furnace, and the reaction furnace is used for stirring the component A to prepare a brazing base material for later use;

step 2: the borax, the boric acid, the fluoride and the active silicon dioxide are placed into a reaction furnace, and the reaction furnace is used for stirring the component B to prepare a brazing reinforcing material for later use;

and step 3: putting the lithium, boron, phosphorus and rosin alcohol solution into a reaction furnace, and stirring the component C by the reaction furnace to prepare a wetting agent for later use;

and 4, step 4: putting the zinc oxide, ammonium chloride, vaseline and nano zinc borate into a reaction furnace, and stirring the component D by the reaction furnace to prepare an auxiliary soldering flux for later use;

and 5: and mixing the component A, the component B, the component C and the component D to prepare a prefabricated brazing filler metal, and processing the prefabricated brazing filler metal into the foil brazing filler metal by adopting a single-roller rapid cooling tape making method.

7. The method of making a brazing composition according to claim 6, wherein: the single-roller quenching belt-making method in the step 5 comprises the following preparation steps:

(A) the method comprises the following steps The prefabricated brazing filler metal is processed into blocks and is placed in a quartz crucible with a gap type nozzle at the bottom, and the distance between the nozzle and a quenching roller is about 2-3 mm;

(B) the method comprises the following steps Heating a quartz crucible by an induction coil to melt the massive prefabricated brazing filler metal into a solution, and simultaneously adjusting the rotating speed of quenching to 1500 revolutions per minute;

(C) the method comprises the following steps Quenching and solidifying the brazing filler metal and centrifugally throwing the brazing filler metal out along the tangential direction of the wheel roller to obtain the foil brazing filler metal.

8. The method of making a brazing composition according to claim 6, wherein: the brazing composition is applied to brazing of parts such as stainless steel, heat-resistant steel and high-temperature alloy.

Technical Field

The invention relates to the technical field of brazing processes, in particular to a brazing composition and a preparation method thereof.

Background

Brazing is a metal joining process in which two or more metal articles are joined together by melting and flowing a brazing material (which may be a metal or metal alloy) into a joint defined between the metal articles. More specifically, brazing is a thermally induced metal bonding process that occurs below the melting points of the metals to be joined that have an introduction between the metals in the joint of the brazing material that has a lower melting point than the metals to be joined.

The existing brazing composition generally has the defects of low joint strength, low capacity of removing an oxide film and low wetting capacity; most of the traditional brazing filler metals contain precious metals and toxic elements, do not meet the environmental protection requirement and have higher preparation cost; to this end, we propose a method of preparing a brazing composition.

Disclosure of Invention

The invention provides a brazing composition and a preparation method thereof, which have the advantages of low cost, wide application range and low processing difficulty, and are beneficial to refining the structure of a brazed joint and improving the strength of the joint.

The invention adopts the following technical means for solving the technical problems:

a brazing composition is formed by processing a component A, a component B, a component C and a component D, wherein the component A comprises an aluminum-based brazing filler metal, a copper-based brazing filler metal, a manganese-based brazing filler metal and a nickel-based brazing filler metal, the component B comprises borax, boric acid, fluoride and active silicon dioxide, the component C comprises lithium, boron, phosphorus and rosin alcohol solution, and the component D comprises zinc oxide, ammonium chloride, vaseline and nano zinc borate; the component A is prepared into a brazing base material; the component B is prepared into a brazing reinforcing material; preparing the component C into a wetting agent; and the component D is prepared into auxiliary soldering flux.

The component A comprises the following materials in parts by weight: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal;

the component B comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide;

the C component comprises the following materials in parts by weight: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution;

the D component comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate;

further, the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal are all powdery brazing filler metals and are prepared by a gas atomization powder preparation method.

Further, the fluoride comprises 20-40 parts of sodium fluoride, 10-20 parts of tetrabutylammonium fluoride and 5-15 parts of fluoborate.

Further, the fluoride includes 30 parts of sodium fluoride, 15 parts of tetrabutylammonium fluoride and 10 parts of fluoroborate.

Further, the dosage of each material of the component A is respectively as follows: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal; the component B comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide; the C component comprises the following materials in parts by weight: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution; the D component comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate.

A method of making a brazing composition, the method comprising the steps of:

step 1: the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal are placed into a reaction furnace, and the reaction furnace is used for stirring the component A to prepare a brazing base material for later use;

step 2: the borax, the boric acid, the fluoride and the active silicon dioxide are placed into a reaction furnace, and the reaction furnace is used for stirring the component B to prepare a brazing reinforcing material for later use;

and step 3: putting the lithium, boron, phosphorus and rosin alcohol solution into a reaction furnace, and stirring the component C by the reaction furnace to prepare a wetting agent for later use;

and 4, step 4: putting the zinc oxide, ammonium chloride, vaseline and nano zinc borate into a reaction furnace, and stirring the component D by the reaction furnace to prepare an auxiliary soldering flux for later use;

and 5: and mixing the component A, the component B, the component C and the component D to prepare a prefabricated brazing filler metal, and processing the prefabricated brazing filler metal into the foil brazing filler metal by adopting a single-roller rapid cooling tape making method.

Further, the single-roller quenching strip making method in the step 5 comprises the following preparation steps:

(A) the method comprises the following steps The prefabricated brazing filler metal is processed into blocks and is placed in a quartz crucible with a gap type nozzle at the bottom, and the distance between the nozzle and a quenching roller is about 2-3 mm;

(B) the method comprises the following steps Heating a quartz crucible by an induction coil to melt the massive prefabricated brazing filler metal into a solution, and simultaneously adjusting the rotating speed of quenching to 1500 revolutions per minute;

(C) the method comprises the following steps Quenching and solidifying the brazing filler metal and centrifugally throwing the brazing filler metal out along the tangential direction of the wheel roller to obtain the foil brazing filler metal.

Further, the brazing composition is applied to brazing of parts such as stainless steel, heat-resistant steel and high-temperature alloy.

The invention provides a brazing composition and a preparation method thereof, which have the following beneficial effects:

the invention provides a brazing composition, which is formed by processing a component A, a component B, a component C and a component D, wherein the component A comprises an aluminum-based brazing filler metal, a copper-based brazing filler metal, a manganese-based brazing filler metal and a nickel-based brazing filler metal, the component B comprises borax, boric acid, fluoride and active silicon dioxide, the component C comprises lithium, boron, phosphorus and a rosin alcohol solution, and the component D comprises zinc oxide, ammonium chloride, vaseline and nano zinc borate; the component A is prepared into a brazing base material; the component B is prepared into a brazing reinforcing material; preparing the component C into a wetting agent; the component D is prepared into auxiliary soldering flux; the brazing composition prepared from the materials has the advantages of low cost, wide application range and low processing difficulty, is beneficial to refining the structure of a brazed joint and improving the joint strength, can effectively remove an oxidation film and improve the wettability in the brazing process, does not contain noble metals and toxic elements, and meets the requirement of environmental protection.

Drawings

FIG. 1 is a schematic flow chart of one embodiment of a brazing composition and method of making the same according to the invention.

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to FIG. 1, a schematic flow diagram of the brazing composition preparation in one embodiment of the invention is shown.

The invention provides a brazing composition, which is formed by processing a component A, a component B, a component C and a component D, wherein the component A comprises an aluminum-based brazing filler metal, a copper-based brazing filler metal, a manganese-based brazing filler metal and a nickel-based brazing filler metal, the component B comprises borax, boric acid, fluoride and active silicon dioxide, the component C comprises lithium, boron, phosphorus and a rosin alcohol solution, and the component D comprises zinc oxide, ammonium chloride, vaseline and nano zinc borate; preparing the component A into a brazing base material; b, preparing a brazing reinforcing material from the component B; preparing the component C into a wetting agent; and the component D is prepared into auxiliary soldering flux.

The dosage of each material of the component A is respectively as follows: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal;

the B component comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide;

the dosage of each material of the component C is respectively as follows: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution;

the component D comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate;

in one embodiment, the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal are all powdered brazing filler metals and are prepared by a gas atomization powder preparation method.

In one embodiment, the fluoride comprises sodium fluoride 20-40 parts, tetrabutylammonium fluoride 10-20 parts, and fluoroborate 5-15 parts.

Specifically, the fluoride comprises 30 parts of sodium fluoride, 15 parts of tetrabutylammonium fluoride and 10 parts of fluoborate.

In one embodiment, the amounts of the materials of the component A are respectively as follows: 30-40 parts of aluminum-based brazing filler metal, 20-30 parts of copper-based brazing filler metal, 10-20 parts of manganese-based brazing filler metal and 5-10 parts of nickel-based brazing filler metal; the B component comprises the following materials in parts by weight: 10-20 parts of borax, 10-20 parts of boric acid, 5-10 parts of fluoride and 3-5 parts of active silicon dioxide; the dosage of each material of the component C is respectively as follows: 2-4 parts of lithium, 3-5 parts of boron, 1-3 parts of phosphorus and 4-8 parts of rosin alcohol solution; the component D comprises the following materials in parts by weight: 12-16 parts of zinc oxide, 8-12 parts of ammonium chloride, 3-6 parts of vaseline and 2-5 parts of nano zinc borate.

The invention also provides a preparation method of the brazing composition, which comprises the following steps:

step 1: putting the aluminum-based brazing filler metal, the copper-based brazing filler metal, the manganese-based brazing filler metal and the nickel-based brazing filler metal into a reaction furnace, and stirring the component A by the reaction furnace to prepare a brazing base material for later use;

step 2: putting borax, boric acid, fluoride and active silicon dioxide into a reaction furnace, and stirring the component B by the reaction furnace to prepare a brazing reinforcing material for later use;

and step 3: putting the lithium, boron, phosphorus and rosin alcohol solution into a reaction furnace, and stirring the component C by the reaction furnace to prepare a wetting agent for later use;

and 4, step 4: putting zinc oxide, ammonium chloride, vaseline and nano zinc borate into a reaction furnace, and stirring the component D by the reaction furnace to prepare an auxiliary soldering flux for later use;

and 5: and mixing the component A, the component B, the component C and the component D to prepare a prefabricated brazing filler metal, and processing the prefabricated brazing filler metal into the foil brazing filler metal by adopting a single-roller rapid cooling tape making method.

In one embodiment, the single-roll quench strip making process in step 5 is prepared as follows:

(A) the method comprises the following steps Processing the prefabricated brazing filler metal into blocks, and placing the blocks in a quartz crucible with a gap type nozzle at the bottom, wherein the distance between the nozzle and a quenching roller is about 2-3 mm;

(B) the method comprises the following steps Heating a quartz crucible by an induction coil to melt the massive prefabricated brazing filler metal into a solution, and simultaneously adjusting the rotating speed of quenching to 1500 revolutions per minute;

(C) the method comprises the following steps Quenching and solidifying the brazing filler metal and centrifugally throwing the brazing filler metal out along the tangential direction of the wheel roller to obtain the foil brazing filler metal.

In one embodiment, the brazing composition is used for brazing parts such as stainless steel, heat resistant steel, and high temperature alloys.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.