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

A welding method for ferrous metals

A ferrous metal, welding method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of difficult to fuse interface stably, low strength of brazed joints, difficult to meet actual working conditions, etc. The effect of eliminating equipment investment and reducing process costs

Active Publication Date: 2016-01-20
CHANGSHA VIBO WEARABLE MATERIAL CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrous metal composite materials are widely used due to their excellent performance. Brazing is an important method to realize the preparation of ferrous metal composite materials. At present, reducing atmosphere and vacuum copper brazing processes are commonly used. Due to the interface between ferrous metals during brazing Stable fusion is difficult, either there is low strength of brazed joints, which is difficult to meet the needs of actual working conditions, or it requires a large amount of equipment investment and high cost of surface cleaning, resulting in high production costs, and the product size is also affected by the vacuum welding furnace. size limit

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

[0015] (I) The natural graphite with a carbon content of more than 99% is ground by mechanical ball milling, and then sieved-classified, and the average particle size is 100-120 μm Graphite powder, then add forming agent-rubber to the graphite powder, then granulate, and punch it into a sheet with a thickness of 0.05 mm on a punching machine to obtain a sheet-shaped graphite solder.

[0016] (II) Place the obtained flake graphite brazing material between carbon steel-cast iron welded parts to form a shape similar to a "sandwich", and then place the whole in a high-temperature furnace that has been filled with helium, Continuously inject helium gas, heat to 1100°C, keep it warm for more than 3 hours, and then take it out of the furnace after cooling to achieve good welding of the two materials. The welded material is inspected by ultrasonic flaw detection, and no defective spot is found in the weld. After testing, the strength of the welded joint can reach more than 350MPa.

Embodiment 2

[0018] Adopt the method substantially identical with embodiment 1 to weld stainless steel---high chromium cast iron, following parameter has difference: adopt the graphite product waste material that carbon content is more than 90% to make raw material, the average particle diameter of the graphite powder after grinding is 150 ~200μm; the thickness of flake graphite solder is 0.085mm; the heat preservation is over 10 hours.

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a welding method of a ferrous metal. The welding method comprises the following steps: (I) adding a high-molecular polymer plasticizer to a graphite granule material with the carbon content greater than 90%, and stamping into flakes to obtain flake solder; (II) placing the flake solder between ferrous metal pieces to be welded, and then placing the whole body into a high-temperature container into which an inert gas is introduced, continuously introducing the inert gas, and cooling after keeping the heat for a certain period of time. By adopting the welding method disclosed by the invention, ferrous metal (homogeneous and heterogenous) materials can be welded well. Any cleaning and special surface pre-treatment processes are not required to be performed on the welded pieces, the equipment investment is reduced, and the process cost is reduced. Meanwhile, solder graphite is wide in source, so that the cost of the raw materials can also be reduced.

Description

technical field [0001] The invention relates to a metal welding method, in particular to a welding method between ferrous metals. Background technique [0002] At present, in the field of metal industry, metals are usually divided into ferrous metals and non-ferrous metals. Ferrous metals mainly refer to iron, manganese, chromium and their alloys, such as steel, pig iron, iron alloys, cast iron, etc. Ferrous metal composite materials are widely used due to their excellent performance. Brazing is an important method to realize the preparation of ferrous metal composite materials. At present, reducing atmosphere and vacuum copper brazing processes are commonly used. Due to the interface between ferrous metals during brazing Stable fusion is difficult, either there is low strength of brazed joints, which is difficult to meet the needs of actual working conditions, or it requires a large amount of equipment investment and high cost of surface cleaning, resulting in high producti...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/19B23K1/008
CPCB23K1/008B23K1/19
Inventor 王韩希邱娟
Owner CHANGSHA VIBO WEARABLE MATERIAL CO LTD