Soldering preparation method for stainless steel laminate type inspirator

A stainless steel layer and injector technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of plastic deformation of the circulation channel, and reduce the possibility of plastic deformation and the possibility of plastic deformation of the circulation channel. the effect of short welding time

Inactive Publication Date: 2011-09-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a brazing preparation method for a stainless steel laminate injector. By controlling the thickness of the brazing material and the process par

Method used

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  • Soldering preparation method for stainless steel laminate type inspirator
  • Soldering preparation method for stainless steel laminate type inspirator
  • Soldering preparation method for stainless steel laminate type inspirator

Examples

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preparation example Construction

[0037] A brazing preparation method of a stainless steel laminate injector provided by the invention, such as figure 1 As shown, it specifically includes the following steps:

[0038] Step 1: Plating a nickel layer of 0.01 to 0.02 mm on the upper and lower surfaces of the laminates to be welded for each layer of the laminate injector to be brazed, respectively, using an electroplating process.

[0039] Step 2: Process the 0.03-0.06mm thick foil-shaped solder according to the shape between the two adjacent layers in the laminate injector to obtain n-1 layers of foil-shaped solder, where n is to be brazed The number of layers of the laminate structure of the laminate injector. The composition of the foil-shaped brazing filler metal is as follows: 20-30% copper, 0.1-5% manganese, 0.1-3% nickel, and the rest is silver.

[0040] Step 3: Place n-1 pieces of foil-shaped solder between the n laminate parts of the laminate injector, and assemble the laminate injector according to the...

Embodiment 1

[0050] Example 1: Brazing stainless steel laminate injector with Ag-20Cu-0.1Mn-0.1Ni solder

[0051] When applying the brazing preparation method of the stainless steel laminate injector provided by the invention to the brazing preparation of the gas-oxygen / methane small-thrust engine laminate injector (having a five-layer laminate structure), it specifically includes the following steps :

[0052] Step 1: For the fuel plate, oxidant plate, top plate, splitter plate A and splitter plate B of the gas-oxygen / methane small-thrust engine laminate injector, the surfaces to be welded are plated with a nickel layer of 0.01mm on the surface by electroplating.

[0053] Step 2: Process the 0.03mm thick foil-shaped brazing filler metal according to the shape between the top layer plate, splitter plate A, splitter plate B, fuel plate and oxidizer plate of the laminate injector, and obtain 4 Block foil solder. The composition of the foil-like solder is as follows: 20% copper, 0.1% mang...

Embodiment 2

[0057] Example 2: Using Ag-28Cu-0.1Mn-0.1Ni brazing material to braze the stainless steel laminate injector

[0058] When applying the brazing preparation method of the stainless steel laminate injector provided by the present invention to brazing the oxygen / methane small-thrust engine laminate injector (having a five-layer laminate structure), it specifically includes the following steps :

[0059] Step 1: Plating a nickel layer of 0.02 mm on the surfaces of the five stainless steel laminates to be welded by electroplating.

[0060] Step 2: Process the 0.03mm foil-shaped solder into the desired pattern according to the assembled position to obtain four layers of foil-shaped solder. The composition of the foil-shaped solder is 28% copper and 0.1% copper by weight. Manganese, 0.1% nickel, the remainder silver;

[0061] Step 3: Place the foil-like solder between the fuel plate, oxidant plate, top plate, splitter plate A and splitter plate B of the gas-oxygen / methane small-th...

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Abstract

The invention provides a soldering preparation method for a stainless steel laminate type inspirator. The method comprises the following steps of: 1, plating nickel layers on the upper and lower surfaces of each laminate required to be soldered of a laminate type inspirator to be soldered; 2, machining a foil-shaped brazing filler metal according to the shapes of two adjacent layers in the laminate type inspirator; 3, placing the foil-shaped brazing filler metal between laminate parts of the laminate type inspirator; and 4, placing the laminate type inspirator into a vacuum chamber, heating and pressurizing to perform soldering. By the method, the technical problem of plastic deformation of a hole and a circulation channel between the surfaces of laminates due to overhigh temperatures andpressure in the soldering preparation process in the prior art is successfully solved by controlling the thickness and the process parameters of the brazing filler metal. In the invention, a stainless steel laminate is well dampened by the brazing filler metal, so that the probability of soldering quality problems caused by non-uniform pressure existing in the diffusion soldering process can be reduced.

Description

technical field [0001] The invention belongs to the technical field of liquid rocket engine preparation, and in particular relates to a brazing preparation method of a stainless steel laminate injector. Background technique [0002] With the continuous development of manned spaceflight technology, more stringent environmental protection requirements and the intensification of competition in the international commercial rocket market, the use of conventional toxic propellant systems will be limited, and non-toxic, non-polluting, high-performance, low-cost space propulsion The system is becoming the main direction of technological research in countries in the 21st century. In the process of developing a non-toxic small-thrust engine, injector design is one of the key technologies, which has a great impact on indicators such as combustion efficiency, thermal protection and response characteristics. Compared with the traditional injector, the laminate injector has the advantage...

Claims

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Application Information

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IPC IPC(8): B23K1/20B23K35/14B23K35/24
Inventor 李家文曲文卿蔡国飙
Owner BEIHANG UNIV
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