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Dedicated welding active agent for deep penetration TIG welding and using method

An active agent and deep penetration technology, which is applied in the field of welding active agent and special welding active agent for deep penetration TIG welding, to achieve the effect of avoiding coarse structure, improving mechanical properties and reducing production costs

Inactive Publication Date: 2014-08-20
ZHANGJIAGANG HUABAO MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although deep penetration TIG welding has been able to weld thicker plates, there are still great difficulties in welding carbon steel and stainless steel plates with a thickness of 14mm and above

Method used

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  • Dedicated welding active agent for deep penetration TIG welding and using method
  • Dedicated welding active agent for deep penetration TIG welding and using method
  • Dedicated welding active agent for deep penetration TIG welding and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Substrate pretreatment: The substrate is made of AISI316 stainless steel (its chemical composition is shown in Table 2). Before welding, it needs to be mechanically polished until the plate appears metallic luster, and then use absolute ethanol to clean the grease and other dirt on the surface , especially within the range of 50mm on both sides of the welded joint must ensure that the surface of the weldment is clean. Under normal circumstances, the weldment must be used in time after cleaning to avoid the influence of oil on the welding quality, otherwise it needs to be cleaned again.

[0029] Table 2 AISI316 chemical composition (mass fraction %)

[0030]

[0031] (2) Preparation of active agent powder: by mass percentage, NaCl powder 15%, CaO powder 20%, MgF 2 Powder 15%, Fe 2 o 3 Powder 10%, SiO 2 Powder 7%, TiO 2 Powder 8%, Cr 2 o 3 Powder 17%, La 2 o 3 Powder 4% and Y 2 o 3 Powder 4%, weigh various powders with an electronic scale, grind them in ...

Embodiment 2

[0035](1) Substrate pretreatment: The substrate is made of AISI316 stainless steel (its chemical composition is shown in Table 2). Before welding, it needs to be mechanically polished until the plate appears metallic luster, and then use absolute ethanol to clean the grease and other dirt on the surface , especially within the range of 50mm on both sides of the welded joint must ensure that the surface of the weldment is clean. Under normal circumstances, the weldment must be used in time after cleaning to avoid the influence of oil on the welding quality, otherwise it needs to be cleaned again.

[0036] (2) Preparation of active agent powder: by mass percentage, NaCl powder 10%, CaO powder 15%, MgF 2 Powder 17%, Fe 2 o 3 Powder 14%, SiO 2 Powder 8%, TiO 2 Powder 9%, Cr 2 o 3 Powder 18%, La 2 o 3 Powder 4.5% and Y 2 o 3 4.5% powder, use an electronic scale to weigh various powders, grind them in a mortar for half an hour to mix them evenly, and then use a sieve to se...

Embodiment 3

[0047] (1) Substrate pretreatment: The substrate is made of X70 pipeline steel (its chemical composition is shown in Table 3). Before welding, it needs to be mechanically polished until the plate appears metallic luster, and then use absolute ethanol to clean the grease and other dirt on the surface. In particular, within the range of 50mm on both sides of the welded joint, the surface of the weldment must be clean. Under normal circumstances, the weldment must be used in time after cleaning to avoid the influence of oil on the welding quality, otherwise it needs to be cleaned again.

[0048] Table 3X70 chemical composition (mass fraction %)

[0049]

[0050] (2) Preparation of active agent powder: by mass percentage, NaCl powder 5%, CaO powder 10%, MgF 2 Powder 20%, Fe 2 o 3 Powder 15%, SiO 2 Powder 10%, TiO 2 Powder 10%, Cr 2 o 3 Powder 20%, La 2 o 3 Powder 5% and Y 2 o 3 5% powder, use an electronic scale to weigh various powders, grind them in a mortar for ha...

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Abstract

The invention discloses a dedicated welding active agent for deep penetration TIG welding. The welding active agent is composed of, by mass, five percent to 15 percent of NaCl powder, 10 percent to 20 percent of CaO powder, 15 percent to 20 percent of MgF2 powder, 10 percent to 15 percent of Fe2O3 powder, seven percent to 10 percent of SiO2 powder, eight percent to 10 percent of TiO2 powder, 17 percent to 20 percent of Cr2O3 powder, four percent to five percent of La2O3 powder and four percent to five percent of Y2O3 powder. The using method of the active agent comprises the steps that calculation is carried out according to the mass percent, 92 percent to 95 percent of the powder of the dedicated welding active agent for deep penetration TIG welding is mixed with five percent to eight percent of acetone to form the pasty or grease-shaped welding active agent, the surface of a workpiece is evenly coated with the welding active agent through a brush, and welding is carried out after the acetone is fully volatilized. According to the welding active agent, complete penetration is achieved on AISI316 austenitic stainless steel and X70 pipeline steel with the thickness of 14 mm through deep penetration TIG welding, the welding process is simplified, a coarse structure is avoided, the mechanical property of a welding joint is improved, production efficiency is improved, and production cost is lowered.

Description

technical field [0001] The invention relates to a welding activator and a use method, in particular to a special welding activator for deep penetration TIG welding and a use method, and belongs to the field of welding technology. Background technique [0002] On the basis of traditional TIG welding, deep penetration TIG welding achieves a relative balance between the large arc pressure formed by high current (>300A) and the surface tension of the liquid metal in the molten pool, forming small holes to realize deep penetration welding. It can achieve single-sided welding and double-sided forming of 12mm thick stainless steel materials. The welding process is stable, the corrugation is fine, and the forming is beautiful. It is a real high-speed, high-efficiency, and low-cost welding method. Deep penetration TIG welding is a small hole welding method, which is essentially different from the principle of small hole plasma welding in the welding process. Plasma welding require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K9/167
CPCB23K9/167B23K35/3601B23K35/362
Inventor 罗震侯贤忠
Owner ZHANGJIAGANG HUABAO MACHINERY MFG
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