阅读说明：本技术 一种焊料及通过该焊料焊接的保温容器 (Solder and heat-insulating container welded by same ) 是由 胡华成 彭利泉 于 2020-05-22 设计创作，主要内容包括：本发明涉及一种焊料及通过该焊料焊接的保温容器。该焊料按照重量百分比包括,银40-80%、铜10-30%、钛5-30%。该保温容器包括钛材料内胆和不锈钢外壳；该内胆和外壳之间装配后留有焊接容腔,使用如上所述的焊料进行真空钎焊焊接,焊接后实现内胆和外壳的连接。本发明可以实现保温容器的钛内胆和不锈钢外壳之间焊接连接,其焊接部位的抗拉强度高,致密性好,确保保温容器的质量并延长其使用寿命。(The invention relates to a solder and a heat-insulating container welded by the solder. The solder comprises, by weight, 40-80% of silver, 10-30% of copper and 5-30% of titanium. The heat preservation container comprises a titanium material inner container and a stainless steel shell; a welding cavity is reserved between the inner container and the shell after assembly, the welding flux is used for vacuum brazing welding, and the inner container and the shell are connected after welding. The titanium inner container and the stainless steel shell of the heat-insulating container can be welded and connected, the welding part has high tensile strength and good compactness, the quality of the heat-insulating container is ensured, and the service life of the heat-insulating container is prolonged.)

1. A solder for effecting a vacuum brazing weld between titanium and stainless steel, characterized by: the solder comprises, by weight, 40-80% of silver, 10-30% of copper and 5-30% of titanium.

2. The solder according to claim 1, wherein: the silver, the copper and the titanium are ground into powder according to the proportion, and the fineness of the powder is 300-800 meshes.

3. A heat-insulating container comprises a titanium material inner container and a stainless steel shell; the method is characterized in that: a welding cavity is reserved between the inner container and the shell after assembly, the welding flux of claim 1 or 2 is used for vacuum brazing welding, and the inner container and the shell are connected after welding.

4. The thermal container according to claim 3, characterized in that: the temperature of the vacuum brazing is 750-890 ℃.

5. The thermal container according to claim 3, characterized in that: the width of the welding cavity is 0.1-3.0 mm.

6. The thermal container according to claim 3, characterized in that: the vacuum brazing part adopts overlap welding or edge rolling welding.

7. The thermal container according to claim 4, characterized in that: the heat preservation time of the vacuum brazing is 50-70 min.

Technical Field

The invention relates to a heat-insulating container and a processing technology thereof, in particular to a solder and a heat-insulating container welded by the solder.

Background

At present, many people can fill water in a thermos cup and also can fill acidic drinks such as fruit juice, fruit tea, fruit powder granules, carbonated beverages and the like. The main material of the existing heat preservation container (especially the vacuum cup) is stainless steel, namely, the inner container and the outer shell of the vacuum cup are both made of stainless steel. The stainless steel has a high melting point and does not release undesirable substances due to high-temperature melting. However, stainless steel is most afraid of strong acid, and if drinks with strong acid are loaded for a long time, the inner container of the stainless steel is likely to be damaged. The damaged inner container of the stainless steel vacuum cup can cause the chromium, nickel and manganese elements contained in the stainless steel to migrate rapidly, and more heavy metals are likely to migrate in a short time. Moreover, the migration is often unrecognizable to the naked eye, which brings hidden dangers to the health of the user. Some people also like to soak the traditional Chinese medicine in a vacuum cup, so that the traditional Chinese medicine is convenient to carry and drink. However, a large amount of acidic substances are dissolved in the decocted traditional Chinese medicine, and the acidic substances are easy to react with chemical substances contained in the inner wall of the vacuum cup and are dissolved in the decoction, so that adverse effects are generated on the human body. The titanium vacuum cup has the advantages that strong acid and strong alkali resistance is not needed, the titanium vacuum cup is in contact with the traditional Chinese medicine, any chemical reaction is not generated, and the safety and the convenient carrying of the traditional Chinese medicine can be realized. No matter what the cup is, the cup can be filled with coffee, fruit juice, fruit tea, fruit powder granules, carbonated beverage and milk, no heavy metal is separated out, and the cup is not limited to what the cup wants to drink, and even people with metal allergy can use the cup without worry. Secondly, the method comprises the following steps: titanium is beneficial to the human body, and this light metal has the ability to regulate the body's natural electrical current through cell ionization. Titanium has special current characteristics, has beneficial physiological effect on human body, is chemically stable, cannot change or deteriorate with time, and is beneficial to physical and psychological health of human body. Therefore, the titanium product can achieve the effects of relaxing spirit, relaxing muscles and improving motor function. Thirdly, the method comprises the following steps: titanium oxide is an inorganic compound of titanium and oxygen and is generally used as food additives, paint, cosmetic additives and the like. Titanium oxide is classified into rutile type and anatase type according to its crystal structure. Among them, anatase type has a bactericidal effect. The titanium oxide thin film oxidized at the positive electrode has a temperature characteristic in the chemical synthesis treatment, and this characteristic causes the titanium oxide thin film to be anatase crystals and formed on the surface of titanium. The titanium surface is an oxide film, so that the iron rust taste of metal products is not felt, the peculiar smell of the beverage is not generated, and the taste can be fresh and cool. The mechanism of the photo-antibacterial action is that after the titanium oxide receives light, positive holes and negative electrons on the surface of the titanium oxide are released. This energy dissolves with oxygen contained in water to form active oxygen, and hydrogen and oxygen are produced by decomposing water. In this process, the beverage is further mellow in taste because the organic substances are sterilized and decomposed by the action of hydrogen and active oxygen, and also the foreign germs, sour taste, and the like are decomposed. Fourthly: titanium is known as biological metal, widely used for medical appliances and human body implantation, is a universally recognized healthy and nontoxic element in the world, has no influence on the vegetative nerve and gustatory nerve of people, and is resistant to strong acid and strong alkali. Therefore, the titanium vacuum cup is slightly expensive, but has obvious benefits for human bodies.

In order to solve the problems, the Chinese patent application publication (publication number: CN 110432727A) discloses a vacuum cup with outer steel and inner titanium and a vacuumizing process. It comprises the following steps: manufacturing a double-layer inner container, a titanium alloy inner container layer and a stainless steel inner container layer. Manufacturing a shell, comprising the following steps: a stainless steel layer: stainless steel pipe material, cutting pipe, water expanding, forming, rolling thread after products are complete, and forming the outer shell; and (5) stamping the outsole to form and vacuumizing holes. Manufacturing a finished cup body, comprising the following steps: the inner container shell is matched with a buckle for welding, and the outer bottom is welded (the upper air suction sheet is welded); placing glass cement after welding; the glass cement is heated and melted by vacuum equipment to reach a high vacuum state after being cooled. The vacuum interlayer sealing performance of the vacuum cup is greatly improved and the service life of the vacuum cup is prolonged by adopting the double-layer inner titanium alloy as the inner container, the stainless steel of the outermost shell, the 3-layer process and the hollow position vacuum layer in the inner container and the shell.

However, at present, the titanium material and the stainless steel have poor welding fastness, even the titanium material and the stainless steel cannot be welded together by adopting a common welding mode, and the quality of the heat preservation container of the titanium inner container and the stainless steel shell is poor.

Disclosure of Invention

The invention aims to provide a solder and a heat preservation container welded by the solder, which mainly solve the problems in the prior art, can realize the welding connection between a titanium inner container and a stainless steel shell of the heat preservation container, has high tensile strength and good compactness of the welding part, ensures the quality of the heat preservation container and prolongs the service life of the heat preservation container.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a solder for effecting a vacuum brazing weld between titanium and stainless steel, characterized by: the solder comprises, by weight, 40-80% of silver, 10-30% of copper and 5-30% of titanium.

The solder is characterized in that: the silver, the copper and the titanium are ground into powder according to the proportion, and the fineness of the powder is 300-800 meshes.

A heat-insulating container comprises a titanium material inner container and a stainless steel shell; the method is characterized in that: a welding cavity is reserved between the inner container and the shell after assembly, the welding flux is used for vacuum brazing welding, and the inner container and the shell are connected after welding.

The heat preservation container is characterized in that: the temperature of the vacuum brazing is 750-890 ℃.

The heat preservation container is characterized in that: the width of the welding cavity is 0.1-3.0 mm.

The heat preservation container is characterized in that: the vacuum brazing part adopts overlap welding or edge rolling welding.

The heat preservation container is characterized in that: the heat preservation time of the vacuum brazing is 50-70 min.

By the technical scheme, the invention has the advantages that:

the invention can realize the effective connection between the titanium inner container and the stainless steel shell of the heat-insulating container through the solder, the surface of the welding line close to the stainless steel forms nickel-silver-copper alloy (nickel comes from the stainless steel) through the solder, and the tensile strength of the side reaches about 50MPa-110 MPa. One side of the welding line close to the titanium liner is formed with a diffusion layer alloy of TiCu and TiCu2 through welding materials, and the tensile strength of the side reaches about 50MPa-110 MPa. The lowest mid-hardness of the weld is due to the strength of the solder not forming an alloy.

Drawings

FIG. 1 is a schematic view of the structure of the insulated container of the present invention.

FIG. 2 is a schematic view of the structure of a vacuum brazing portion of the heat insulating container of the present invention 1.

FIG. 3 is a schematic view of the structure of the vacuum brazing portion of the heat insulating container of the present invention 2.

FIG. 4 is another schematic view of the vacuum brazing site of the thermal container of the present invention.

FIG. 5 is a schematic view showing still another structure of the vacuum brazing portion of the heat insulating container of the present invention.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention.

Referring to fig. 1-3, the present invention discloses a thermal container. As shown in the figure: the titanium-based stainless steel water heater comprises a titanium material inner container 1 and a stainless steel shell 2; a welding containing cavity 3 is reserved between the inner container and the shell after assembly, vacuum brazing welding is carried out between the welding containing cavities 3 through a welding flux 4, and the inner container and the shell are connected after welding.

The invention provides a solder 4 which is beneficial to vacuum fiber welding between a titanium inner container 1 and a stainless steel shell 2. The solder comprises, by weight, 40-80% of silver, 10-30% of copper and 5-30% of titanium. During preparation, the silver, the copper and the titanium are ground into powder according to the proportion, the fineness of the powder is 300-800 meshes, and the powder is mixed to form the solder.

During welding, as shown in fig. 2 and 3, the width of a welding cavity reserved at the cup mouth is 0.1-3.0mm, and then the welding flux is adopted to carry out vacuum brazing by adopting the common vacuum brazing process steps. The temperature of the vacuum brazing is 750-890 ℃, the vacuum brazing part adopts overlap welding or edge rolling welding, and the heat preservation time of the vacuum brazing is 50-70 min.

Referring to fig. 3, 4 and 5, there are three structural schematic diagrams of the welding chambers that can be used in the present invention.