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Brazing filler metal adding and welding method for nozzle assembly

A welding method and brazing material technology, which is applied in the field of aerospace, can solve the problems of solder easy to separate from the main body, uneven weld seam, low pass rate, etc., and achieve the effect of solving welding quality problems, uniform weld seam, and reducing scrap rate

Pending Publication Date: 2020-05-08
TIANJIN CHENGLI AVIATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of the existing technology are that the solder is easy to separate from the main body during processing, the weld seam is uneven, the pass rate of 0.7 size is low, the cost is high, the efficiency is low, and the pass rate is low

Method used

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  • Brazing filler metal adding and welding method for nozzle assembly
  • Brazing filler metal adding and welding method for nozzle assembly

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Embodiment Construction

[0019] A brazing filler metal addition and welding method for a spout assembly, comprising the following steps:

[0020] 1) Select B-Ni52MnCoNbSi(Fe,B)-S thin strip brazing filler metal, and process it into a brazing filler metal ring by laser cutting;

[0021] 2) The thin strip brazing material is vacuum brazed in the brazing temperature range of 1170-1190°C and the brazing holding time range of 12-22 minutes, which meets the brazing technical requirements;

[0022] 3) Inspection after welding is completed:

[0023] ① A single air hole ≤ 0.2, the number is not counted;

[0024] ② Surface pores ≤ 0.5, number ≤ 2, spacing ≥ 3mm;

[0025] ③ Visually check that there should be a round root in each hole K on the gas cover, and there should be solder at the butt joint;

[0026] ④ The surface of the part is allowed to have solder accumulation.

[0027] In the step (1), the thickness of the thin strip brazing material selected is t=0.4-0.6mm.

[0028] According to the brazing fi...

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Abstract

The invention provides a brazing filler metal adding and welding method for a nozzle assembly. The brazing filler metal adding and welding method for the nozzle assembly comprises the following steps:1) selecting B-Ni52MnCoNbSi(Fe,B)-S thin-strip brazing filler metal, and machining the thin-strip brazing filler metal into a brazing filler metal ring through laser cutting; 2) carrying out vacuum brazing on the thin-strip brazing filler metal in a brazing temperature interval of 1170-1190 DEG C and a brazing heat-insulation time interval of 12-22min, and meeting the technical requirements of brazing; and 3) detecting after welding is completed. According to the brazing filler metal adding and welding method for the nozzle assembly, the brazing filler metal is not liable to separate from a main body, a welding joint is uniform, and a high dimension pass percent and stable quality are achieved; and according to the method, the rejection rate of products is greatly lowered, high efficiencyis achieved, and the welding quality problem of the products is effectively solved.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a solder adding and welding method for a spout assembly. Background technique [0002] In the field of aerospace technology, the nozzle equipped on the nozzle is brazed and machined after the gas cover and the nozzle are assembled. The requirements for dimensional accuracy, position accuracy and surface roughness are high. The material of the nozzle is 0Cr15Ni5Cu2Ti, and the material of the gas cover is It is GH4648. There are 12 small holes of ￠2.5(K) evenly distributed along the circumference of the gas shield near the weld, and the solder is B-Ni52MnCoNbSi(Fe,B)-S. The joint length of the weld joint surface of the nozzle and the gas cover in the axial direction is only 2.5mm. Due to the influence of the part structure, and the material of the part is similar to the material of the solder, it is not suitable to judge the welding depth during X-ray inspection, and After weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/14
CPCB23K1/0008B23K1/14
Inventor 熊成红陈立任金茹
Owner TIANJIN CHENGLI AVIATION TECH CO LTD
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