Fluxes for Cast Iron Welding and How to Use Them

Abstract

The invention provides a soldering flux for cast iron welding and a use method of same. The soldering flux is prepared mainly by mixing powder and a liquid additive, wherein the powder is obtained mainly by mixing the following components with 100-200-mesh particle size: yttrocalcite powder, calcite powder, celestite powder, hornblende asbestos plaster, ferromolybdenum powder and ferrosilicon powder; the liquid additive is obtained by mixing an emulsifier and a wetting agent; and the mass percentages of all the components in the soldering flux are as follows: 25-30 percent of yttrocalcite powder, 20-30 percent of calcite powder, 10-12 percent of celestite powder, 10-20 percent of ferrosilicon powder, 3-5 percent of ferromolybdenum powder, 2-5 percent of ferrosilicon powder, 3-5 percent of emulsifier and 4-6 percent of wetting agent. The soldering flux and the use method thereof are simple, quick and convenient; heating is not needed before welding, and heat preservation is not needed after welding; the obtained weld metal has a beautiful appearance, and has no hot crack, cold crack, gas pores or fracture structures; and the welding technology is simple, the quality is stable and reliable, the cost is low, machining can be performed after welding, and pressure tests can achieve the index requirements.

Description

technical field

[0001] The invention relates to the technical field of metal welding, in particular to a flux for cast iron welding and a method for using the same. Background technique

[0002] The most commonly used cast iron electrodes in daily operations are nickel-based cast iron electrodes. However, when encountering iron castings with water pressure, air pressure and oil pressure requirements, nickel-based cast iron electrodes cannot meet the requirements for use. In the case of iron castings with high carbon or magnesium content, the droplets do not wet the groove, become small balls and fly away, which is very difficult to weld; at the same time, when using nickel-based cast iron electrodes to weld iron castings, the weld metal has the following defects: (1) When nickel-based cast iron electrodes are welded to iron castings working at high temperatures, the yield point of the weld metal will increase, the plasticity will decrease, and the notch sensitivity will incr...

Examples

Embodiment 1

[0028] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 30 parts yttrium fluorite powder, 30 parts calcite powder, 12 parts Celestine powder, 10 parts of amphibole asbestos ash, 5 parts of ferromolybdenum powder and 2 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0029] According to the weight ratio, take 5 parts of emulsifier and 6 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0030] A binder is also added to the flux, and according to the weight ratio, 10 parts of the binder are taken for later use.

[0031] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0032] How to use the flux of this product: Weigh the above-mentioned raw materials by weight, mix them evenly to make this product, put it in a container, immerse the alkaline electrode in ...

Embodiment 2

[0034] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 25 parts yttrium fluorite powder, 27 parts calcite powder, 10 parts Celestine powder, 20 parts of amphibole asbestos ash, 4 parts of molybdenum and ferrosilicon powder and 5 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0035] According to the weight ratio, take 3 parts of emulsifier and 6 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0036] A binder is also added to the flux, and 15 parts of the binder are taken according to the weight ratio for use.

[0037] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0038] The flux is added to the powder for preparing the alkaline electrode coating, mixed evenly and used to make an alkaline electrode, wherein the added weight ratio of the flux an...

Embodiment 3

[0040] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 28 parts yttrium fluorite powder, 28 parts calcite powder, 12 parts Celestine powder, 15 parts of amphibole asbestos ash, 4 parts of molybdenum iron powder and 4 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0041] According to the weight ratio, take 4 parts of emulsifier and 5 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0042] A binder is also added to the flux, and according to the weight ratio, 16 parts of the binder are taken for later use.

[0043] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0044] The flux is added to the powder for preparing the alkaline electrode coating, mixed evenly and used to make an alkaline electrode, wherein the added weight ratio of the flux and the...

technical field

[0001] The invention relates to the technical field of metal welding, in particular to a flux for cast iron welding and a method for using the same. Background technique

[0002] The most commonly used cast iron electrodes in daily operations are nickel-based cast iron electrodes. However, when encountering iron castings with water pressure, air pressure and oil pressure requirements, nickel-based cast iron electrodes cannot meet the requirements for use. In the case of iron castings with high carbon or magnesium content, the droplets do not wet the groove, become small balls and fly away, which is very difficult to weld; at the same time, when using nickel-based cast iron electrodes to weld iron castings, the weld metal has the following defects: (1) When nickel-based cast iron electrodes are welded to iron castings working at high temperatures, the yield point of the weld metal will increase, the plasticity will decrease, and the notch sensitivity will incr...

Examples

Embodiment 1

[0028] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 30 parts yttrium fluorite powder, 30 parts calcite powder, 12 parts Celestine powder, 10 parts of amphibole asbestos ash, 5 parts of ferromolybdenum powder and 2 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0029] According to the weight ratio, take 5 parts of emulsifier and 6 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0030] A binder is also added to the flux, and according to the weight ratio, 10 parts of the binder are taken for later use.

[0031] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0032] How to use the flux of this product: Weigh the above-mentioned raw materials by weight, mix them evenly to make this product, put it in a container, immerse the alkaline electrode in ...

Embodiment 2

[0034] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 25 parts yttrium fluorite powder, 27 parts calcite powder, 10 parts Celestine powder, 20 parts of amphibole asbestos ash, 4 parts of molybdenum and ferrosilicon powder and 5 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0035] According to the weight ratio, take 3 parts of emulsifier and 6 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0036] A binder is also added to the flux, and 15 parts of the binder are taken according to the weight ratio for use.

[0037] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0038] The flux is added to the powder for preparing the alkaline electrode coating, mixed evenly and used to make an alkaline electrode, wherein the added weight ratio of the flux an...

Embodiment 3

[0040] Flux for cast iron welding, the flux is mainly made by mixing powder and liquid additives, wherein, according to the weight ratio, the particle size is 100-200 mesh, 28 parts yttrium fluorite powder, 28 parts calcite powder, 12 parts Celestine powder, 15 parts of amphibole asbestos ash, 4 parts of molybdenum iron powder and 4 parts of ferrosilicon powder are mixed uniformly to make powder, for use;

[0041] According to the weight ratio, take 4 parts of emulsifier and 5 parts of wetting agent and mix them uniformly to make an additive, for subsequent use;

[0042] A binder is also added to the flux, and according to the weight ratio, 16 parts of the binder are taken for later use.

[0043] The product is prepared by uniformly mixing the powder, additive and adhesive prepared above.

[0044] The flux is added to the powder for preparing the alkaline electrode coating, mixed evenly and used to make an alkaline electrode, wherein the added weight ratio of the flux and the...