Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for brazing in vacuum state

A brazing method and technology in vacuum state, applied in the field of brazing under vacuum state, can solve the problems of substandard brazing strength, high operator skill level, uneven thermal stress distribution, etc. The effect of uniform thermal stress distribution, reducing the probability of oxides and impurities, and improving the efficiency of brazing

Inactive Publication Date: 2013-04-24
昆山众备机械设备有限公司
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the brazing products commonly used in the market are obtained by artificial intermediate frequency and high frequency brazing to fix the alloy, but the products obtained in this way have certain problems, such as: the appearance of the product is rough, the brazing strength is not up to the standard, The thermal stress distribution is uneven, and the open working environment makes oxides form on the surface of the product; in addition, this brazing method has low work efficiency and requires high skill level of the operator. The temperature during brazing is controlled by visual inspection, It is not accurate enough, and the open working environment is likely to have a greater adverse impact on the operator and the surrounding environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Brazing of advance knife under vacuum

[0018] (1) Welding parts cleaning: remove oil, oxide, burrs and other debris on the surface of the leading knife to ensure that the leading knife is clean and dry. The main purpose is to avoid introducing impurities during brazing and to ensure the brazing of the leading knife quality.

[0019] (2) Brazing filler metal fixation: The brazing filler metal is fixed on the surface of the leading knife with a wire with a melting point above 1300℃. In this embodiment, the metal wire is a wire of Cr25Ni20 with a diameter of 0.1 mm, and the brazing filler metal is imported HT series filler metal.

[0020] (3) Vacuum heating of the vacuum brazing furnace: Put the advance knife fixed with the brazing filler metal into the vacuum brazing furnace, so that the vacuum brazing furnace can be heated-heat preservation-heating-heat preservation within the range of 2-3 hours Multi-step heating method finally heats up to 1050 -1120 ℃, specif...

Embodiment 2

[0023] Example 2 Brazing of shell knives under vacuum

[0024] (1) Welding parts cleaning: remove oil stains, oxides, burrs and other debris on the surface of the shell knife to ensure that the shell knife is clean and dry. The main purpose is to avoid introducing impurities during brazing and to ensure the brazing of the shell knife. quality.

[0025] (2) Brazing filler metal fixation: The brazing filler metal is fixed on the surface of the shell knife with a wire with a melting point above 1300℃. In this embodiment, the metal wire is a wire of Cr25Ni20 with a diameter of 0.1 mm, and the brazing filler metal is imported HT series filler metal.

[0026] (3) Vacuum heating of the vacuum brazing furnace: Put the shell knife fixed with the brazing material into the vacuum brazing furnace, so that the vacuum brazing furnace can be heated-heat preservation-heating-heat preservation within the range of 2-3 hours Multi-step heating method finally heats up to 1050 -1120 ℃, specificall...

Embodiment 3

[0029] Example 3 Brazing of the main cutting tool under vacuum

[0030] (1) Welding parts cleaning: remove oil stains, oxides, burrs and other sundries on the surface of the main cutter to ensure that the main cutter is clean and dry. The main purpose is to avoid the introduction of impurities during brazing and ensure the main cutter Brazing quality.

[0031] (2) Brazing filler metal fixation: The brazing filler metal is fixed on the surface of the main cutter with a wire with a melting point above 1300℃. In this embodiment, the metal wire is a wire of Cr25Ni20 with a diameter of 0.1 mm, and the brazing filler metal is imported HT series filler metal.

[0032] (3) Vacuum heating of the vacuum brazing furnace: Put the main cutting knife fixed with the brazing material into the vacuum brazing furnace, so that the vacuum brazing furnace can be heated-heat preservation-heating-heat preservation within the range of 2-3 hours The stepped heating method is finally heated to 1050 -1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Shear strengthaaaaaaaaaa
Shear strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for brazing in a vacuum state. The method includes steps of weldment cleaning, brazing filler metal fixing, vacuumizing heating of a vacuum brazing furnace, heat insulation, and weldment cooling. The vacuumizing heating of the vacuum brazing furnace specifically includes steps of heating to the temperature ranging from 1050 DEG C to 1120 DEG C in a manner of heating, insulating heat, heating and insulating heat within 2-6 hours, insulating for 10-60 minutes within the temperature range, heating and insulating heat at the same time of vacuumizing the brazing furnace. The method for brazing in the vacuum state has the advantages that by vacuum heating equipment, brazing is realized in the vacuum state, and work efficiency of brazing is improved. Meanwhile, artificial uncontrollable factors are converted into stable states controlled by the equipment, brazing products obtained is high in strength, flat in appearance and uniform in thickness of a brazing layer and heat stress distribution, and brazing environment is kept clean, and oxide and impurity generation rate on the product surface and in the brazing layer is decreased. Further, products are stable in quality and suitable for batch production.

Description

technical field [0001] The invention relates to a brazing method, in particular to a brazing method in a vacuum state. Background technique [0002] At present, most of the brazing products commonly used in the market are obtained by artificial intermediate frequency and high frequency brazing to fix the alloy, but the products obtained in this way have certain problems, such as: the appearance of the product is rough, the brazing strength is not up to the standard, The thermal stress distribution is uneven, and the open working environment makes oxides form on the surface of the product; in addition, this brazing method has low work efficiency and requires high skill level of the operator. The temperature during brazing is controlled by visual inspection, It is not accurate enough, and the open working environment is likely to have a relatively large adverse effect on the operator and the surrounding environment. Contents of the invention [0003] In order to solve the d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K1/008
Inventor 贾明
Owner 昆山众备机械设备有限公司