Method for improving welding performance of general carbon steel covered electrodes

A welding performance, ordinary carbon steel technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem that ordinary carbon steel electrodes cannot be used for casting welding, to improve welding performance, improve chemical composition, The effect of reducing the percentage content

Inactive Publication Date: 2015-03-04
HUNAN ANHUA XIANGAN TUNGSTEN IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a method for improving the welding performance of ordinary carbon steel electrodes, which can make the commonly used ordinary carbon steel electrodes suitable for general iron castings and steel castings. welding

Method used

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  • Method for improving welding performance of general carbon steel covered electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Taking the carbon steel electrode of the E4303 brand as an example, the calcium alloy of ZG-1, ZG-2, ZG-3, ZG-4 and ZG-5 manufactured by Hangzhou Xingang Petrochemical Co., Ltd. is applied to the E4303 carbon steel electrode. Base lubricating grease, after proper drying in a far-infrared drying box dedicated to welding rods, the specific drying process is as follows: adjust the temperature at 350°C-400°C for 1-2 hours, and the E4303 carbon steel electrode after drying It can improve the hardness and strength of the weld seam when welding to castings, and improve the wear resistance of the weld seam.

[0015] For welding with ordinary carbon steel electrodes, there are fluctuations in the welding arc and intermittent arcs; the strength of the weld is insufficient, and the weld is easy to crack.

[0016] The ordinary carbon steel welding rods coated with calcium-based grease of the above-mentioned ZG-1, ZG-2, ZG-3, ZG-4 and ZG-5 types are directly baked for 1-2 hours on t...

Embodiment 2

[0018] Take the E4303 carbon steel electrode as an example, apply ZN2 or ZN3 sodium-based grease manufactured by Hangzhou Xingang Petrochemical Co., Ltd. on the E4303 carbon steel electrode, and dry it properly in a far-infrared drying box. The specific drying process is as follows: adjust the temperature at 350°C-400°C and bake for 1-2 hours. The baked E4303 carbon steel electrode can improve the welding process performance when welding castings, reduce the amount of dust generated and improve the slag removal of slag. sex.

[0019] Welding with ordinary carbon steel electrodes, the molten metal is easily affected by the external environment, the weld seam cools down too quickly, and the dust generation is relatively large, and the slag and slag removal performance is relatively poor.

[0020] The ordinary carbon steel electrode coated with the above-mentioned ZN2 and ZN3 grades of sodium-based grease, after baking for 1-2 hours, and then welding the workpiece, has gas protec...

Embodiment 3

[0022] On the carbon steel electrode of E4303 brand, apply the calcium-based grease and sodium-based grease in Example 1 and Example 2 at the same time, after 350°C-400°C heat preservation and baking for 1-2 hours, the baked E4303 carbon steel electrode The comprehensive properties possessed by the electrodes in Embodiment 1 and Embodiment 2 can be obtained, and in actual production practice, real-time adjustments can be made according to the materials available on site.

[0023] attached figure 1 The middle is the comparison diagram of the welding effect between the carbon steel electrode with the improved performance in this embodiment and the common electrode. It is a schematic diagram of the weld seam of the workpiece welded by the traditional carbon steel electrode without treatment. It can be clearly seen in the figure that there is a large crack in the weld seam on the right, which seriously affects the structural strength of the workpiece.

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Abstract

The invention discloses a method for improving a welding performance of general carbon steel covered electrodes. At least one of calcium-based lubricating grease or sodium-based lubricating grease is coated on the carbon steel covered electrodes; and then, the covered electrodes are insulated and baked for 1-2 hours in an oven of 350-400 DEG C for welding castings. The method performs the high-temperature baking after coating the lubricating grease on the carbon steel covered electrodes, so that chemical components of covered electrode coatings and the welding performance of the covered electrodes can be effectively improved, and the welding strength of workpieces is improved; and the method can replace special covered electrodes to weld general iron castings and steel castings under the condition of deficient covered electrodes.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method for improving the welding performance of common carbon steel electrodes. Background technique [0002] In the welding production process, welding electrodes are classified according to grades, and different grades are for different welding materials. The most commonly used electrodes are generally ordinary carbon steel electrodes, but they cannot be used for welding iron castings, steel castings, or welding between dissimilar metal materials. If ordinary carbon steel electrodes are used for welding the above materials, It will seriously affect the welding quality and affect the safety of production. [0003] In some mines or construction sites in mountainous areas, often due to inconvenient transportation, untimely and incomplete supply of production materials (welding rods), the most common carbon steel welding rods are often used for welding cast iron, steel castings...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40
CPCB23K35/40
Inventor 蒋艺平
Owner HUNAN ANHUA XIANGAN TUNGSTEN IND
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