Product Categories
Contact Us

Ningbo Davison Machinery Manufacture Co.,Ltd

Address: No. 199, Xinmei Road, Gaoxin Zone, Ningbo City, Zhejiang Province, China

Manager: Ms Lisa 

E-mail:export@dongxiong.com

Tel: 0086-1886-866-7352

Fax:0086-574-87630666


News

HF Welder Spare Parts Improve The Welding Process Performance

First, HF Welder Spare Parts materials

(A) manual arc HF Welder Spare Parts HF Welder Spare Parts material 1, the electrode composition of the electrode is coated with a drug supply arc HF Welder Spare Parts using the melting electrode. It is composed of two parts: the skin and the core.

(L) Welded core. The metal core covered with the coating is called the core. Welded core is generally a wire with a certain length and diameter. HF Welder Spare Parts, the HF Welder Spare Parts core has two roles: First, conduction HF Welder Spare Parts current, resulting in electric energy into heat; Second, the HF Welder Spare Parts core itself melting metal and metal filler metal to form a weld.

Special wire for HF Welder Spare Parts can be divided into carbon structural steel wire, alloy steel and stainless steel wire three categories.

(2) drug skin. The coating applied to the surface of the HF Welder Spare Parts core is called a drug coating. In the outside of the HF Welder Spare Parts electrode coated with a variety of minerals such as the composition of the skin, can make the arc combustion stability, weld quality is improved.

In the skin to add some reductant, the oxide reduction, to ensure the quality of the weld.

Due to the high temperature of the arc, some of the alloying elements contained in the weld metal are burned (oxidized or nitrided), which reduces the mechanical properties of the weld. By adding iron alloy or pure alloying elements to the electrode of the electrode, it is transferred to the weld metal as the coating melts to compensate for the burning of the alloying elements and improve the mechanical properties of the weld metal.

Improve the HF Welder Spare Parts process performance so that the arc stable combustion, less splash, weld forming, easy slagging and HF Welder Spare Parts efficiency.

In short, the role of the skin is to ensure that the weld metal to obtain the required chemical composition and mechanical properties, and the electrode has a good HF Welder Spare Parts process performance.

2, the classification of the electrode

(L) according to the use of the electrode points:

L) low carbon steel and low alloy high strength steel electrode (referred to as structural steel electrode).

2) stainless steel electrode.

3) surfacing electrodes.

4) low temperature steel electrode.

5) cast iron electrode.

6) nickel and nickel alloy electrode.

7) copper and copper alloy electrode.

8) aluminum and aluminum alloy electrode.

(2) according to the electrode coating after melting the slag characteristics:

L) Acid electrode.

Generally used for HF Welder Spare Parts low carbon steel and less important steel structure.

2) alkaline electrode.

Alkaline slag deoxidation more complete, but also can effectively eliminate the weld metal sulfur, alloying elements burn less, so the weld metal mechanical properties and crack resistance are good, can be used for alloy steel and important carbon steel Structure of the HF Welder Spare Parts.

3, the choice of HF Welder Spare Parts electrodes should be based on the composition of the composition of the chemical composition of welded steel, mechanical properties. Weldability and working environment (with or without corrosive medium, high temperature or low temperature) requirements, and the shape of the welded structure. Force and HF Welder Spare Parts equipment (whether there is a DC HF Welder Spare Parts machine) and other aspects of comprehensive consideration to determine which kind of electrode selection. In the selection of electrodes should pay attention to the following principles:

(L) the mechanical properties of weldments, chemical composition. Low carbon steel, medium carbon steel and low alloy steel according to its strength level to select the appropriate strength of the electrode.

Determine the strength of the electrode and then determine the use of acidic or alkaline electrode, mainly depends on the specific shape of the HF Welder Spare Parts structure of the complexity of the thickness of the steel, the weld load conditions (static or dynamic) and steel crack resistance And the difficulty of obtaining a DC power supply. In general, for the plastic, impact toughness and crack resistance requirements are higher, low temperature conditions of the weld should be used alkaline electrode; when subject to certain conditions and can not clean the low carbon steel weld groove at the rust The Oil and oxide and other dirt, should be used on the rust, oil and oxide skin sensitivity and resistance to strong air resistance of the electrode.

Dissimilar steel HF Welder Spare Parts such as low carbon steel and low alloy steel, different strength grades of low alloy steel HF Welder Spare Parts, the general selection and lower strength grade steel to match the electrode.

(2) HF Welder Spare Parts parts of the working conditions and performance. Pearlescent heat-resistant steel is generally used with steel chemical composition similar to the electrode, or according to the working temperature of the weldment to select.

(3) simplify the process, improve productivity and reduce costs.

4, the choice of HF Welder Spare Parts parameters Arc HF Welder Spare Parts HF Welder Spare Parts parameters are mainly electrode diameter, HF Welder Spare Parts current, arc voltage, HF Welder Spare Parts layer, power type and polarity.

(1) the choice of electrode diameter. The choice of electrode diameter depends mainly on the thickness of the weldment, joint type, weld position and HF Welder Spare Parts level and other factors. Without prejudice to the quality of HF Welder Spare Parts under the premise, in order to improve labor productivity, generally tend to choose large diameter electrode.

(2) the choice of HF Welder Spare Parts current. Mainly according to the type of electrode, electrode diameter, weldment thickness, joint type, weld space and HF Welder Spare Parts level and other factors to decide, of which the most important factor is the electrode diameter and weld space position.

(3) the choice of arc voltage. The arc voltage is determined by the length of the arc. Arc long, then the arc voltage is high; arc is short, then the arc voltage is low.

(4) the choice of HF Welder Spare Parts layer number. In the medium and thick plate electrode arc HF Welder Spare Parts, often using multi-layer HF Welder Spare Parts.

(5) the choice of power supply type and polarity. DC power supply, arc stability, splash small, good HF Welder Spare Parts quality, generally used in the important HF Welder Spare Parts structure or thick plate of the structure of the HF Welder Spare Parts. In other cases, should first consider the use of AC HF Welder Spare Parts machine.

Under normal circumstances, the use of alkaline HF Welder Spare Parts or thin plate HF Welder Spare Parts, the use of DC reverse; and acid electrode, usually selected is connected.

(B) carbon arc planing work only need to pay, DC arc HF Welder Spare Parts machine, no air compressor.

(3) submerged arc HF Welder Spare Parts materials

1, the HF Welder Spare Parts wire according to the different HF Welder Spare Parts materials, submerged arc HF Welder Spare Parts wire with carbon structural steel wire, alloy steel wire. High alloy steel wire, all kinds of non-ferrous metal HF Welder Spare Parts wire and HF Welder Spare Parts wire. According to the needs of HF Welder Spare Parts technology, in addition to stainless steel wire and non-ferrous metal wire, the wire surface are copper, in order to facilitate rust and improve the conductivity.

The same current using a smaller diameter wire, you can get to increase the weld penetration, reducing the effect of melting width. When the workpiece assembly is bad, should use thicker wire.

2. Flux submerged arc HF Welder Spare Parts flux is divided into steel flux and non-ferrous metal flux, according to the manufacturing method is divided into melting flux, sintered flux and ceramic flux.

(1) Flux should meet the following basic requirements:

L) has good metallurgical properties.

2) has a good process performance.

(2) the classification of flux. Submerged arc HF Welder Spare Parts flux in addition to its use is divided into steel flux and non-ferrous metal flux, usually according to manufacturing methods, chemical composition, chemical properties and particle structure classification.

L) According to the manufacturing method is divided into: melting flux, sintered flux and ceramic flux.

2) According to the chemical composition is divided into: alkaline flux, acid flux and neutral flux.

(3) flux and HF Welder Spare Parts wire matching.

Low carbon steel HF Welder Spare Parts can use high manganese high silicon flux, with H08MnA wire, or use low manganese, manganese-free solder with H08MnA and H10MnZ wire. Low-alloy high-strength steel HF Welder Spare Parts can be used in the manganese or low manganese silicon-type flux with steel strength to match the wire.

Heat-resistant steel, low-temperature steel, corrosion-resistant steel HF Welder Spare Parts can be used in the silicon or low-silicon flux with the corresponding alloy steel wire. Ferritic, austenitic and other high-alloy steel, the general use of higher alkalinity melting flux or sintering, ceramic flux to reduce the burning of alloying elements and more alloying elements.

Second, HF Welder Spare Parts equipment

(A) gas HF Welder Spare Parts equipment gas HF Welder Spare Parts equipment, including oxygen cylinders, acetylene generator (or dissolved acetylene bottle) and tempering fuse, etc .; gas HF Welder Spare Parts tools, including HF Welder Spare Parts torch, pressure reducer and hose.

The torch is divided into two types: the pulverized torch and the isoproteric torch. According to the number of flames, the flame is divided into single flame and flame. The combustible gas is divided into acetylene, Gasoline and other use; according to the use of methods are divided into two types of manual and mechanical.

Injective torch is also known as low pressure torch, it is suitable for low pressure and medium pressure acetylene gas (0.001-0.1MPa), the current domestic application more. Equal pressure torch is only suitable for medium pressure acetylene gas.

(B) submerged arc HF Welder Spare Parts equipment submerged arc HF Welder Spare Parts equipment by the HF Welder Spare Parts power supply, submerged arc HF Welder Spare Parts machine and auxiliary equipment.

Submerged arc HF Welder Spare Parts power can be used with AC, DC or AC and DC. Submerged arc HF Welder Spare Parts machine according to its degree of automation can be divided into semi-mechanized (semi-automatic) welder and mechanized (automatic) welder; according to the use can be divided into general and special HF Welder Spare Parts machine; by arc automatic adjustment can be divided into constant speed wire and Uniform type of HF Welder Spare Parts machine; according to the number of HF Welder Spare Parts wire can be divided into monofilament, double wire and multi-wire welder; according to the form of walking can be divided into car type, gantry and telescopic arm type.

Commonly used mechanized submerged arc HF Welder Spare Parts machine with constant speed into the wire and variable speed into the two, generally by the nose, control box, rail (or bracket) composition.

(C) CO2 gas shielded HF Welder Spare Parts equipment Semi-automatic CO2 gas shielded HF Welder Spare Parts equipment mainly by the HF Welder Spare Parts power supply, gas supply system, wire feeding mechanism and HF Welder Spare Parts torch and other components.

The gas supply system is mainly composed of CO2 cylinders and preheaters, dryers and gas flow meters, pressure reducers and valves. Dryers are divided into high pressure (gas is not dry before decompression) and low pressure (gas after decompression after drying) two, its main role is to absorb water and moisture in CO2 gas. Usually, the air only in the high pressure dryer.

Semi-automatic HF Welder Spare Parts of the wire feed method has propulsion, drawing, push-pull and lengthening push-type four, the most widely used is the propulsion system.

CO2 gas shielded HF Welder Spare Parts equipment should also have a control system.

(D) inert gas shielded HF Welder Spare Parts equipment Manual inert gas shielded HF Welder Spare Parts equipment, including HF Welder Spare Parts torch, HF Welder Spare Parts power and control devices, gas supply and water supply system four parts.

(5) Plasma arc HF Welder Spare Parts equipment Plasma arc HF Welder Spare Parts equipment mainly includes HF Welder Spare Parts power supply, control system, HF Welder Spare Parts torch, gas system and water system.

(6) resistance HF Welder Spare Parts equipment Resistance HF Welder Spare Parts equipment refers to the use of resistance heating principle of HF Welder Spare Parts operation of a device, by the mechanical device, power supply devices and control devices and other components.