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

Sandwiched alloy powder block used for built-up welding and its preparation method and application

A technology of alloy powder and surfacing metal, which is applied in the field of sandwich alloy powder for surfacing and its preparation, can solve the problems of limited alloy content in the surfacing layer, only applicable, complex manufacturing process, etc., to reduce production costs and improve Production efficiency and the effect of reducing equipment investment

Inactive Publication Date: 2009-10-28
SHANDONG UNIV
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN86106019B "heat-resistant and wear-resistant surfacing electrode", CN1116574A "a kind of high-chromium cast iron surfacing material and technology", CN1003430B "high hardness and wear-resistant no preheating surfacing electrode" and other surfacing electrodes; and CN1238154C "a A kind of flux such as sintered flux for surfacing welding of continuous casting rollers and its production method”; welding rod and flux have the advantages of flexible use and convenient manufacture, but the transition coefficient of alloying elements is low, the composition of surfacing metal is not stable and uniform enough, and surfacing welding The number of layer alloys is limited by the process method, and it is only suitable for low and medium alloy surfacing metals
[0006] Chinese patent CN1415453A "a cored wire for surfacing", CN1775454A "high crack resistance and wear-resistant high chromium cast iron type surfacing flux-cored wire" and other surfacing flux-cored wires have the disadvantages of complex manufacturing process, high cost, It affects its large-scale promotion, and due to the limitation of the filling factor of the welding wire itself (generally less than 35%), the alloy content of the surfacing layer is also limited and will not be too high
[0007] Chinese patent CN1015523B "alloy for surfacing welding" proposes a welding piece for surfacing welding. The welding piece is smelted in a vacuum induction furnace and made by precision casting. The shape of the welding piece can be determined according to the shape of the surface to be surfacing. Using TIG arc cladding to the surface of the workpiece, the manufacturing process of the welding sheet is relatively complicated
The deposited alloy powder or powder of this patent must contain self-fluxing alloy powder with a low melting point so that it can be melted during induction heating. Obviously, the composition of the alloy powder or powder is greatly limited, and it has great advantages in the design of the wear-resistant layer. Larger limitations, only applicable to self-fluxing alloy powders

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sandwiched alloy powder block used for built-up welding and its preparation method and application
  • Sandwiched alloy powder block used for built-up welding and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: Martensitic steel surfacing welding metal sandwich alloy powder block, the alloy system is C-Si-Mn-Cr-Mo.

[0069] The mass percent of the metal and alloy powder formula is 3.5% high-carbon ferrochrome (containing 65% Cr, 7% C, 3% Si), 3.5% medium-carbon ferromanganese (containing 79% Mn, 1.2% C), 1.9% ferrosilicon (containing 45% Si, 3% Mn), 1.8% ferromolybdenum (containing 57% Mo, 0.5% Si, 0.2% C), 0.14% graphite, and the rest is iron powder. The particle size of the powder is 50-300 mesh. Prepare the alloy powder according to the above ratio, and mix evenly, add 10% of the powder mass of sodium silicate binder and 4% of titanium dioxide, the modulus of the above-mentioned sodium silicate is 3.0, and the Baume degree is 50. Choose an equilateral triangle sizing die with a side length of 10mm, press the alloy powder block according to the production regulations of the welding rod, and send a H08A welding core with a diameter of 2.5mm and a length of 350mm d...

Embodiment 2

[0071] Embodiment 2: Austenitic high manganese steel surfacing welding metal alloy powder block (strip), the alloy system is C-Mn-Si-W.

[0072] The mass percent of metal and alloy powder formula is, 25.2% medium carbon ferromanganese (containing 79% Mn, 1.2% C), 3.5% ferrosilicon (containing 45% Si, 3% Mn), 1.1% graphite, 3.8% % of tungsten iron (containing 70% W, 0.4% C, 1.0% Si), and the rest is iron powder. The particle size of the powder is 50-300 mesh. Prepare the alloy powder according to the above ratio, and mix evenly, add 10% sodium silicate binder and 4% white mud accounting for the mass of the powder. The above-mentioned water glass has a modulus of 3.0 and a Baume degree of 50. Rectangular sizing dies with side lengths of 14mm and 8mm were selected, and the alloy powder blocks were pressed according to the welding rod production regulations. During the pressing process, H08A welding cores with a diameter of 4.0mm and a length of 350mm were sent. The pressed san...

Embodiment 3

[0074] Embodiment 3: Austenitic chromium-manganese steel surfacing welding metal alloy powder block (strip), the alloy system is C-Mn-Cr.

[0075] The mass percent of metal and alloy powder formula is, 25.6% medium carbon ferromanganese (containing 79% Mn, 1.2% C), 2.0% ferrosilicon (containing 45% Si, 3% Mn), 0.6% graphite, 21.0% % of metal chromium, the rest is iron powder. The particle size of the powder is 50-300 mesh. Prepare the alloy powder according to the above ratio, and mix evenly, add 10% sodium silicate binder and 4% titanium dioxide accounting for the mass of the powder. The above-mentioned water glass has a modulus of 3.0 and a Baume degree of 50. Select an isosceles trapezoidal sizing die with upper and lower bases of 8mm and 16mm respectively, and a height of 8mm, and press the alloy powder block according to the production regulations of the welding rod. During the pressing process, send two H08A welding cores with a diameter of 2.5mm and a length of 350mm...

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
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sandwich alloy powder block for surfacing welding, which is made of a coating and a metal core, the sandwich alloy powder block is in any geometric shape; the coating is made of metal and iron alloy powder required by the surfacing metal , adhesive, and plasticizer; the metal cores are steel cores for the production of welding rods or steel strips for the production of flux-cored wires, and the distance between the metal cores is 0-3 mm, symmetrically distributed across the alloy powder block The geometric center of the section, and the minimum thickness of the coating around the metal core is not less than 1mm. The weight ratio of the metal core to the coating is 1:0.3-12. The sandwich alloy powder block for surfacing is prepared by molding or welding rod hydraulic powder coating machine. The invention overcomes the disadvantages of poor electrical conductivity and thermal conductivity of the non-sandwich powder block, and is difficult to melt during induction heating. The problem of melting and being easily blown away by the plasma flow force of the arc greatly improves the production efficiency.

Description

technical field [0001] The invention relates to a welding material for surfacing welding and its preparation method and application, in particular to a novel sandwich alloy powder block for surfacing welding and its preparation method and application. Background technique [0002] In industrial production and processing, mechanical parts often work under extremely complex and harsh conditions, and a large number of mechanical equipment are often scrapped due to wear, corrosion or abrasion. This requires that the surface of mechanical equipment under the working conditions of high temperature and high pressure, high load, oxidation, and corrosion has good properties such as wear resistance, corrosion resistance, high temperature resistance, and oxidation resistance. Surfacing welding is widely used to prepare metal layers with special properties on the surface of parts because of its simple process, low equipment investment, flexible operation and wide adaptability. [0003]...

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): B23K35/02B23K35/22B23K35/30B23K35/40B23K13/01B23K9/04
Inventor 孙俊生
Owner SHANDONG UNIV