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Welding process method of brass H62

A welding process and brass technology, applied in the field of brass H62 welding process, can solve problems such as deformation, poor forming, pores, etc., and achieve the effects of simple operation, improved heat utilization, and improved fluidity

Active Publication Date: 2012-10-03
CHINA NAT CHEM ENG THIRD CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For oxyacetylene welding of brass H62, in order to prevent the metal oxidation of the molten pool and other gases from invading the molten pool, and improve the fluidity of the liquid metal, the process of adding flux to the tin brass welding wire SCu6810A (HSCuZn-3) is usually selected, although The welding process is simple, the deoxidizing element Si in the welding wire can inhibit the burning loss of zinc, and the low welding temperature can reduce the evaporation of zinc in the brass base material, but it is easy to cause problems such as deformation, porosity, incomplete penetration, and poor forming

Method used

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  • Welding process method of brass H62
  • Welding process method of brass H62
  • Welding process method of brass H62

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Base material: brass tube H62, specification φ28×5mm.

[0050] (2) Welding materials: welding wire SCu6810A (HSCuZn-3), specification φ2.5mm; flux CJ301; argon purity 99.99%; cerium tungsten electrode diameter φ2.5mm.

[0051] (3) Groove processing: the pipe is cut with a lathe, and the V-shaped groove is processed with a portable grinder. The groove angle is 37.5° and the blunt edge is 0mm.

[0052] (4) Surface cleaning: Before welding, use a combination of mechanical cleaning and chemical cleaning to remove oil, moisture, and oxides on both sides of the brass H62 welding groove and on the surface of the welding wire within 30mm until the metallic luster is exposed. Specifically, first use a file and a stainless steel wire brush to machine the welding groove and its edge surface to remove oxides, and then scrub and degrease with acetone.

[0053] (5) Flux coating: Prepare the flux CJ301 with absolute ethanol into a paste, and apply it on the cleaned pipe bevel and...

Embodiment 2

[0064] (1) Base material: brass tube H62, specification φ60×5mm.

[0065] (2) Welding materials: welding wire SCu6810A (HSCuZn-3), specification φ2.5mm; flux CJ301; argon purity 99.99%; cerium tungsten electrode diameter φ3.0mm.

[0066] (3) Groove processing: the pipe is cut with a lathe, and the butt V-shaped groove is processed with a portable grinder. The groove angle is 32.5° and the blunt edge is 1.5mm.

[0067] (4) surface cleaning: with embodiment 1,

[0068] (5) Flux coating: same as in Example 1,

[0069] (6) Carry out weldment assembly, the assembly gap is 3.0mm, and it is not allowed to touch the groove with hands when welding assembly assembly.

[0070] (7) Preheating before welding: the pipe is preheated after adding paste flux, using oxyacetylene flame heating method, the preheating temperature is 250 ℃,

[0071] (8) Welding operation: first release the impure gas on the gas cylinder, and use an inverter argon arc welding machine for welding. The inner diamet...

Embodiment 3

[0079] (1) Base material: brass plate H62, specification δ=12mm.

[0080] (2) Welding materials: welding wire SCu6810A (HSCuZn-3), specification φ2.5mm; flux CJ301; argon purity 99.99%; cerium tungsten electrode diameter φ3.2mm.

[0081] (3) Groove processing: the pipe is cut with a lathe, and the X-shaped groove is processed with a portable grinder, the groove angle is 35°, and the blunt edge is 1.0mm (see figure 2 a).

[0082] (4) surface cleaning: with embodiment 1,

[0083] (5) Flux coating: same as in Example 1,

[0084] (6) Carry out weldment assembly, the assembly gap is 2.0mm, and it is not allowed to touch the groove with hands when welding assembly.

[0085] (7) Preheating before welding: the pipe is preheated after adding paste flux, using oxyacetylene flame heating method, the preheating temperature is 300°C,

[0086] (8) Welding operation: First release the impure gas on the gas cylinder, and use an inverter argon arc welding machine for welding. The inner di...

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Abstract

The invention discloses a welding process method of brass H62, which uses a welding wire Scu6810A and a soldering flux CJ301, and uses a manual argon tungsten-arc welding method. The welding process method of the brass H62 comprises the following steps of: firstly, machining a groove of a welding piece, wherein a groove angle is 32.5-37.5 degrees; controlling a truncated edge within a range of 0-1.5 mm; cleaning the welding surface of a welding piece and a welding wire; coating soldering flux paste of the soldering flux CJ301 on the groove of the clean welding piece and an area within a 30-mm range near the groove, as well as the surface of the welding wire; assembling the welding piece with an assembly clearance of 1.5-3.0 mm; pre-heating the welding piece to 200-300 DEG C before welding; welding a welding bead at a bottom layer by using a high-frequency arc striking technology; cleaning the surface of the welding bead at the bottom layer after the welding bead at the bottom layer is welded; coating the CJ301 soldering flux paste on the surface of the welding bead at the bottom layer; welding a filling layer, cleaning the surface of the filling layer after the filling layer is welded, and coating the CJ301 soldering flux paste after cleaning the surface of the filling layer; welding a cover surface layer; welding a weld joint and then pickling, and washing the weld joint with water; and drying with hot air.

Description

technical field [0001] The invention belongs to the field of brass welding, in particular to a brass H62 welding process. Background technique [0002] Brass H62 is widely used in the manufacture of industrial equipment and equipment in petroleum, chemical, food, power transportation, aerospace, aviation, weapons and other industries due to its excellent formability, thermal conductivity, corrosion resistance, ductility and certain strength. pipeline. The on-site welding methods for brass H62 equipment and pipelines mainly include argon tungsten arc welding and oxyacetylene welding. [0003] The argon tungsten arc welding method has the advantages of stable arc, concentrated energy, good protection effect, flexible operation and high welding quality, and has gradually replaced the oxyacetylene welding method. During argon tungsten arc welding, due to the low boiling point of zinc (907°C), when the brass is subjected to the high temperature of energy-concentrated argon tung...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/23B23K9/235B23K103/12
Inventor 夏节文吴明傲苏玉贤
Owner CHINA NAT CHEM ENG THIRD CONSTR
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