Who knows what the outer skin of the welding electrode is made of??

Electrode coating refers to the coating layer applied to the surface of the welding core. The coating is decomposed and melted during the welding process to form gas and slag, which plays the role of mechanical protection, metallurgical treatment and improvement of process performance. The composition of the coating is:

Minerals (such as marble, fluorite, etc.), ferroalloys and metal powders (such as ferromanganese, ferrotitanium, etc.), organic matter (such as wood flour, starch, etc.), chemical products (such as titanium dioxide, sodium silicate, etc.).

According to different situations, there are three classification methods for welding electrodes: classification according to the use of welding rods, classification according to the main chemical components of the coating, and classification according to the characteristics of the slag after the coating is melted. According to the purpose of the electrode, the electrode can be divided into:

Structural steel electrodes, heat-resistant steel electrodes, stainless steel electrodes, hardfacing electrodes, low-temperature steel electrodes, cast iron electrodes, nickel and nickel alloy electrodes, copper and copper alloy electrodes, aluminum and aluminum alloy electrodes, and special-purpose electrodes. If the electrode is classified according to the main chemical composition of the electrode coating, the electrode can be divided into: titanium oxide electrode, titanium oxide calcium electrode, ilmenite electrode, iron oxide electrode, cellulose electrode, low hydrogen electrode, graphite electrode and salt-based electrode.

If the electrode coating is melted and the characteristics of the slag are classified, the electrode can be divided into acid electrode and alkaline electrode. The main components of acid electrode coatings are acid oxides, such as silicon dioxide, titanium dioxide, ferric oxide, etc. The main component of alkaline electrode coating is alkaline oxide, such as marble, fluorite, etc.

After the electrode is melted, it is the molten iron used for welding. The outside is not cement, but a reducing agent that protects the melted iron from oxidation during welding.

After the welding rod is melted, it is the molten iron used for welding, and there are various things on the outside.

Of course, it's not cement.

A certain temperature is required, but it needs to decompose at high temperatures to form a shielding gas layer.

There are all sorts of things out there.

Of course, it's not cement.

A certain temperature is required, but it needs to decompose at high temperatures to form a protective gas layer, which is divided into alkaline, acidic and neutral according to the coating.

At least I know of one that is cellulose electrodes (which seem to be made of paper).

The electrode is composed of a core and a coating.

The iron wire mentioned by the landlord is the welding core, and the cement on the outside is the medicine coating. Of course, the so-called wire and cement are not what you think.

The most common electrode, the core is metal, the material is different, and it is decided according to the object you want to weld.

The composition of the coating material is complex, and its main role is to form protection on the weld.

Welding plays a very important role in engineering and is a very deep practical discipline.

Hope satisfied

I'll give you just one

Rutile 40 55, titanium dioxide 0 2, marble 6 12, white mud 7 10, mica 6 10, sericite or sericite 2 5, fluorite 2 6, ferrotitanium 1 3, manganese metal 4 8, metal chromium 7 10, bamboo powder or wood powder 0 5 1 5, chromium trioxide or ferric oxide 0 3 and anti-stomatal sensitizer 1 5 5;Its anti-stomatal sensitizer also contains magnesium oxide 1 4 and rare earth oxide 0 5 2

The coating on the surface of the electrode plays an extremely important role in the welding process. If the electrode without coating is used for welding, during the welding process, the oxygen and nitrogen in the air will invade the molten metal in large quantities, and the metal iron and beneficial elements such as carbon, silicon, manganese and other oxidation and nitride will be oxidized and nitridized to form various oxides and nitrides, which will remain in the weld, causing slag inclusion or cracks in the weld. The gas fused into the molten pool may cause a large number of porosity in the weld, and these factors can greatly reduce the mechanical properties (strength, impact value, etc.) of the weld and make the weld brittle.

In addition, the use of light electrode welding, the arc is very unstable, the spatter is serious, and the weld forming is very poor.

In practice, it is found that coating a coating composed of various minerals on the outside of the light electrode can stabilize the arc combustion and improve the quality of the weld, and this kind of electrode is called coating electrode.

1) Coating type: titanium type Main ingredient of coating : titanium oxide 35%.

2) Coating type: titanium calcium type Main components of the coating : titanium oxide more than 30%, carbonate less than 20%.

3) Coating type: ilmenite type Main components of pharmaceutical coating: ilmenite 30%.

4) Coating type: iron oxide type Main components of the coating: more iron oxide and more manganese iron deoxidizer.

5) Coating type: high cellulose sodium type Main components of the coating: more than 15% organic matter, about 30% titanium oxide.

6) Coating type: high cellulose potassium type Main components of the coating: more than 15% organic matter, about 30% titanium oxide.

7) Coating type: low hydrogen sodium type Main components of the coating : calcium, magnesium carbonate and fluorite.

8) Coating type: low hydrogen potassium type Main components of the coating : calcium, magnesium carbonate and fluorite.

9) Coating type: iron powder low hydrogen type Main components of the coating : calcium, magnesium carbonate, fluorite and iron powder.

10) Coating type: graphite type Main components of coating : large amount of graphite.

11) Coating type: salt-based main components of the coating : chloride and fluoride.

There are also some special electrodes, that is, certain alloying elements are added to the coating of the welding rod, and the properties of the base metal are improved through welding operations.

Hello. The outer layer of the welding rod is mainly. The role of protection. He is based on. Distinct. Something that is welded. The outer protective layer is also different, and we call this outer layer a medicinal skin.

The weight percentage of the electrode coating composition is: marble, fluorite: titanium dioxide:

Potassium feldspar: soda ash:; Ferroalloys:

Metal powder: ferrochrome nitride:; Ferroalloys are composed of ferrosilicon and ferro-molybdenum under the condition that the total content remains unchanged; Metal powder is composed of manganese metal, chromium metal, and nickel powder under the condition that the total content of the above is unchanged.

After the raw materials of the above-mentioned coating components are mixed evenly, pure sodium sodium glass of a certain concentration of Po Mei is added, and the welding rod is pressed on the welding rod production equipment. The use of this electrode can meet the welding needs of super duplex stainless steel in domestic engineering construction, and the welded weld has excellent mechanical properties, good corrosion resistance of the weld, tensile strength up to 800MPa, and good low-temperature toughness.

Electrode coating refers to the coating layer applied to the surface of the welding core. The coating is decomposed and melted during the welding process to form gas and slag, which plays a role in mechanical protection, metallurgical treatment and improvement of process performance.

The composition of the coating includes: minerals (such as marble, fluorite, etc.), ferroalloys and metal powders (such as ferromanganese, ferrotitanium, etc.), organic substances (such as wood flour, starch, etc.), chemical products (such as titanium dioxide, sodium silicate, etc.).

The commonly used electrode coatings are titanium calcium type (J422 electrode, acid slag) and low hydrogen type (J507 electrode, alkaline slag). Different uses of welding rods, with different powders, the proportion of various things can only tell you very simple, but it is a technical secret, please do not ask.

The iron core inside the electrode is called the welding core.

The outer coating of the solder core is called the coating.

The coating contains arc stabilizers, slag forming agents, gas-making agents, etc.

Play 1 to ensure the stable combustion of the welding arc. Stabilize the welding process.

2 Protect the arc and melt pool. Prevent porosity and improve weld structure and performance.

3. The electrode coating participates in the complex metallurgical reaction, penetrates into the alloying elements required for the weld, and desulfurizes, dephosphorizes and deoxidizes.

The coating is mainly composed of reducing agent, after the successful introduction of the fox, the chemical reaction will occur at high temperature, just like the change in the steelmaking furnace, when the iron core is melted, the reducing agent in the coating will reduce the oxidized part of the iron at high temperature, and at the same time make the melted molten iron uniform, the coating can form a protective umbrella in the channel of the molten iron flow under the action of the arc to avoid the molten iron from being oxidized again.

422 electrode is a tool used for welding.

J422 electrode is a common name (also known as a brand), corresponding to the international standard electrode model E4303, is an acid electrode, coating titanium calcium type, J represents structural steel electrode, 42 is 42kg mm; The tensile strength of the weld metal, the tensile strength of the deposited metal is not less than 420MPa.

422 electrode is a tool used for welding.

Introduction to J422 carbon steel electrode: J422 electrode is a common name (also known as a grade), and the corresponding international standard electrode model is E4303. It is an acid electrode, flux coating titanium-calcium type, J means structural steel electrode, 42 is 42kg mm; The tensile strength of the weld metal, the tensile strength of the deposited metal is not less than 420MPa.

Main uses: It is used for welding the more important low-carbon steel structure and low-alloy steel with low strength grade, and is generally used for the welding of steel structures and ordinary carbon steel pipes.

J422 electrode is a common name (also known as a brand), corresponding to the international standard electrode model E4303, is an acid electrode, coating titanium calcium type, J represents structural steel electrode, 42 is 42kg mm; The tensile strength of the weld metal, the tensile strength of the deposited metal is not less than 420MPa.

Welding rod: A metal strip that melts and fills the joint of the welded workpiece during gas welding or electric welding. The material of the electrode is usually the same as that of the workpiece.

According to different situations, there are different classifications of electrodes, and the electrodes classified by performance are special electrodes manufactured according to their special use performance, such as ultra-low hydrogen electrodes, low-dust and low-toxicity electrodes, vertical downward electrodes, lying electrodes, bottom electrodes, high-efficiency iron powder electrodes, moisture-proof electrodes, underwater electrodes, gravity electrodes, etc.

Introduction to J422 carbon steel electrode: J422 electrode is a common name (also known as a grade), and the corresponding international standard electrode model is E4303. It is an acid electrode, flux coating titanium-calcium type, J means structural steel electrode, 42 is the tensile strength of 42kg mm weld metal, and the tensile strength of deposited metal is not less than 420MPa.

422 electrode: an acid electrode.

422 electrode is a tool used for welding.