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Welding method of stainless steel thin plate

A welding method and stainless steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as complex structure, and achieve the effects of clear process parameters, convenient groove production, and good process stability.

Active Publication Date: 2013-06-12
TANGSHAN CAOFEIDIAN DISTRICT SHOUYAN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multiple ribs are set in the tank, and flanges or socket frames are set at both ends, and the structure is relatively complicated.

Method used

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  • Welding method of stainless steel thin plate
  • Welding method of stainless steel thin plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The material of the stainless steel sheet is 304L, the thickness is 6mm, and the welding length is 6m.

[0021] The following steps and process parameters are used to make:

[0022] 1) A groove is processed on a stainless steel sheet to be welded, the groove cutting angle α is 30°, the uncut thickness d is 1 / 3t, and the gap h between the other stainless steel sheet to be welded is 1 / 3t, Where t is the thickness of the welded stainless steel sheet;

[0023] 2) Wipe the processed surface of the stainless steel sheet to be welded with welding ketone to remove the oil stain on the surface;

[0024] 3) After splicing the two stainless steel sheets to be welded, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0025] 4) Use oxygen as the active shielding gas, and perform welding according to the following process parameters after the molten pool is formed, welding current I: 105A, welding s...

Embodiment 2

[0032] The material of the stainless steel sheet is 304L, the thickness is 6mm, and the welding length is 6m.

[0033] The following steps and process parameters are used to make:

[0034] 1) Process a groove on a stainless steel sheet to be welded, the groove cutting angle α is 45°, the uncut thickness d is 1 / 2t, and the gap h between the other stainless steel sheet to be welded is 1 / 2t, Where t is the thickness of the welded stainless steel sheet;

[0035] 2) Wipe the processed surface of the stainless steel sheet to be welded with welding ketone to remove the oil stain on the surface;

[0036] 3) After splicing the two stainless steel sheets to be welded, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0037] 4) Use the mixed gas of carbon dioxide and argon as the active shielding gas, and perform welding according to the following process parameters after the molten pool is formed. Weld...

Embodiment 3

[0044] The material of the stainless steel sheet is 304L, the thickness is 6mm, and the welding length is 6m.

[0045] The following steps and process parameters are used to make:

[0046] 1) Process a groove on a stainless steel sheet to be welded, the groove cutting angle α is 40°, the uncut thickness d is 1 / 2t, and the gap h between the other stainless steel sheet to be welded is 1 / 2t, Where t is the thickness of the welded stainless steel sheet;

[0047] 2) Wipe the processed surface of the stainless steel sheet to be welded with welding ketone to remove the oil stain on the surface;

[0048] 3) After splicing the two stainless steel sheets to be welded, perform spot welding at intervals of 100 mm, keep the positions of the two welded sheets fixed, and keep the gap between them even;

[0049] 4) Use the mixed gas of carbon dioxide and argon as the active shielding gas, and perform welding according to the following process parameters after the molten pool is formed. Weld...

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Abstract

The invention discloses a welding method of a stainless steel thin plate, which is between an active tungsten electrode argon arc welding method and the conventional stainless steel welding method. In the method, a mixed gas of oxygen or carbon dioxide and argon is used an active protective gas; after a molten pool is formed, welding is performed according to the following set process parameters:the welding current I is 10<5> to 11<5>A, the welding speed v is 90 to 110mm.min<-1>, the arc length L is 3.5mm, and the active protective gas flow Q is 13L.min<-1>; and the length L of the welding joint of welding of each welding rod with a length L1 is controlled between 0.85L1 and L1. The stainless steel thin plate welding method is formed by selecting various groove machining and welding process parameters and repeatedly performing process tests, and avoids requiring use of active agent, allows grooves to be machined conveniently, makes process parameter definite, ensures process stability, allows the welding quality to meet batch-production requirements and allows products to meet set technical requirements on products.

Description

Technical field: [0001] The invention relates to an automatic welding method for large stainless steel sheets. Background technique: [0002] There are many problems in the welding of large stainless steel box (or tank) products in the metallurgical industry. For example, most of the tank bodies currently produced by the applicant are scrubbing tanks used on the rolling production line, such as alkali cleaning tanks, pickling tanks, pretreatment tanks, etc. These large tanks are all welded closed box components, which are mainly welded by large-area stainless steel plates with a thickness of 6-8mm. The maximum length of the steel plate required for the stainless steel box can reach 6m, and the steel plate is often required to be butt welded. This kind of large rectangular box member is generally made of 304L stainless steel, which is very difficult to ensure the quality of the weld, ensure the penetration or the size of the weld leg, avoid the occurrence of welding defects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167
Inventor 蒲存虎赵丽琴连广东
Owner TANGSHAN CAOFEIDIAN DISTRICT SHOUYAN MACHINERY CO LTD
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