Metal core welding wire for submerged arc welding of A304 and A304L austenitic stainess steel

A technology of austenitic stainless steel and A304, applied in arc welding equipment, metal processing equipment, welding medium, etc., to achieve the effects of small welding current, fast welding speed and improved slag removal

Inactive Publication Date: 2007-01-03
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

There is no relevant patent report on the development of submerged arc welding metal cored wire for stainless steel at home and abroad

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specific Embodiment approach

[0033] Select several examples of metal cored wires in the present invention to compare the welding effect with the submerged arc welding solid H0Cr21Ni10 wires commonly used in production. The base metals are A304 and A304L, and their chemical composition is shown in Table 1. The submerged arc flux is HJ260, dried at 400°C before welding, and kept warm for 2 hours. Welding grooves and weld samples are selected in accordance with GB / T17854-199 and GB4334.5-90. All embodiments of the present invention are manufactured by "FCWM50 passive drawing type flux-cored welding wire machine" manufactured by Kunming Heavy Machinery Factory. The specific implementation is as follows:

[0034] 1. Select 14×0.5 (width 14mm, thickness 0.5mm) low-carbon steel strip, and first roll it into a U shape. Take the mass percentage as 57%Cr, 28%Ni, 4%Mn, 7.5%Fe, 0.5%Bi 2 o 3 , 500 grams of metal powder with 3% Al-Mg is put into the powder mixer and mixed for 10 minutes, then the mixed powder is a...

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Abstract

The metal core welding wire for submerged arc welding of A304 and A304L austenitic stainless steel belongs to the field of welding material widely used in petroleum, chemical, ship-building and other fields. The present invention features that the metal core welding wire is formed through adding metal mixture powder in 40-58 wt% into low carbon steel belt material or super low carbon steel belt material, and the metal mixture powder consists of Cr 37-57 wt%, Ni 17-28 wt%, Mn 3-9 wt%, reduced Fe 7.5-30 wt%, Bi2O3 0.5-1.5 wt%, and Al-Mg alloy 2-10 wt%. The corresponding welding specification includes welding current of 380-600 A, welding voltage of 30-40 V and welding speed of 450-800 mm/min. The metal core welding wire has simple production process and excellent post-welding slag removing performance, and is especially suitable for high speed automatic welding.

Description

technical field [0001] The invention belongs to the field of material processing engineering and is mainly used for the welding of austenitic stainless steel in the fields of petroleum, chemical industry, medicine, shipbuilding and food. Background technique [0002] There are many welding methods for austenitic stainless steel, and any method of fusion welding can be used for welding. However, from the perspective of economy, practicality and technology, the most widely used welding methods in production are electrode arc welding, flux cored wire gas shielded welding and submerged arc welding, and the corresponding welding materials are mainly stainless steel electrodes and stainless steel gas shielded flux cores. Welding wire and solid wire for submerged arc welding of stainless steel. In addition, argon tungsten arc welding is also one of the common methods for welding stainless steel, but argon tungsten arc welding can only be used for thin plate welding and root weldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/30B23K9/18
Inventor 栗卓新李国栋戴杰杨雷孙海江
Owner CHINA PETROLEUM & CHEM CORP
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