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Stainless steel wire for welding and method for smelting steel for wire

A smelting method and stainless steel technology are applied in the field of smelting stainless steel wire rods for welding and steel for wire rods, which can solve the problems of poor weld formation, high sensitivity to weld cracks, and large metal spatter, so as to solve the problem of large metal spatter. Effect

Active Publication Date: 2013-08-28
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes the control range of trace element content in the stainless steel wire rod for welding, which can solve the problems of large metal spatter, poor weld formation and high sensitivity to weld cracks in stainless steel welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The stainless steel wire rod for welding in this embodiment is H022Cr21Ni10 with a diameter of Φ5.5mm. After the content of trace elements is controlled, the composition of the steel is (weight percentage):

[0061] C 0.015% Si 0.15 P 0.020% Cr 20.35% Ni 10.02%

[0062] O 0.005% S 0.007% Ca 0.001% Al 0.01% B 0.002%

[0063] Co 0.01% The rest is Fe and unavoidable impurities.

[0064] Control method embodiment one

[0065] This embodiment smelted the stainless steel wire for welding in Wire Example One.

[0066] Ⅰ The pretreated molten iron with the following components by weight percentage is added to the oxygen top blowing converter:

[0067] C 0.5%; O 0.001%; ​​S 0.2%; the rest is Fe and unavoidable impurities.

[0068] 70 tons of molten iron are added to the oxygen top-blowing converter, 14 tons of ferrochrome and 7 tons of nickel-iron alloy are added according to the requirements of the chromium and nickel components of the finished product, and the oxygen gas is 550m 3 Decarbu...

Embodiment 2

[0078] The stainless steel wire for welding in this embodiment is H022Cr21Ni10Si with a diameter of 6.0mm and a trace amount

[0079] After the element content is controlled, the composition of this steel grade (weight percentage) is:

[0080] C 0.020% Si 0.55% P 0.018% Cr 20.00% Ni 9.80%

[0081] O 0.01% S 0.009% Ca 0.0025% Al 0.015% B 0.003% Co 0.02% The rest is Fe and unavoidable impurities.

[0082] Control method embodiment two

[0083] In this embodiment, the stainless steel wire used for welding in Wire Example 2 is smelted.

[0084] Ⅰ The pretreated molten iron with the following components by weight percentage is added to the oxygen top blowing converter:

[0085] C 0.6%; O 0.002%; S 0.15%; the rest is Fe and unavoidable impurities.

[0086] 70 tons of molten iron are added to the oxygen top-blowing converter, 14 tons of ferrochrome and 7 tons of nickel-iron alloy are added according to the requirements of the chromium and nickel components in the finished product, and the ...

Embodiment 3

[0094] The stainless steel wire for welding in this embodiment is H022Cr18Ni12Mo2, with a diameter of 6.5mm,

[0095] After the trace element content is controlled, the composition of the steel grade (weight percentage) is:

[0096] C 0.020% Si 0.15% P 0.018% Cr 18.50% Ni 12.50%

[0097] Mo 2.30% O 0.008% S 0.01% Ca 0.002% Al 0.02% B 0.002% Co 0.05% The rest is Fe and unavoidable impurities.

[0098] Control method embodiment three

[0099] This embodiment smelted the stainless steel wire used for welding in wire example three.

[0100] Ⅰ The pretreated molten iron with the following components by weight percentage is added to the oxygen top blowing converter:

[0101] C 0.4%; O 0.001%; ​​S 0.25%; the rest is Fe and unavoidable impurities.

[0102] 70 tons of molten iron are added to the oxygen top-blowing converter. According to the requirements of the chromium, nickel and molybdenum components in the finished product, 12 tons of ferrochrome, 9 tons of nickel-iron alloy, 1.5 tons o...

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Abstract

The invention relates to a stainless steel wire for welding and a method for smelting steel for wire. The stainless steel wire comprises the following trace elements: 0.003-0.015% of O, 0.005-0.015% of S, more than 0 and not more than 0.005% of Al, more than 0 and not more than 0.003% of B, and more than 0 and not more than 0.2% of Co. The method for smelting the steel for the wire comprises the steps of: 1, adding pretreated molten iron into an oxygen top-blown converter, adding chrome iron and ferronickel alloy according to components in a finished product, and blowing oxygen and decarburizing until the carbon content reaches 0.2-0.3%; 2, adding molten steel into a vacuum oxygen-blown smelting furnace, vacummizing, blowing oxygen, calculating the addition amount of silicon iron when thecontents of carbon, oxygen, sulfur, calcium, aluminum, boron and cobalt meet requirements, adding the silicon iron for deoxidation, and adding lime for desulfuration, blowing argon and stirring; and 3, adding molten steel into a ladle refining furnace, replenishing metal chrome and metal nickel according to the contents of chrome and nickel in the finished product until a requirement on the finished product is met, and continuing the process until the weight percentages of the components of oxygen, sulfur, aluminum, calcium, boron and cobalt in the molten steel reach the requirements on the finished product. According to the stainless steel wire for welding, provided by the invention, severe metal splattering during welding is avoided, and the formation of welded lines is good.

Description

technical field [0001] The invention relates to a stainless steel wire for welding and a method for smelting the steel for the wire. Background technique [0002] Trace elements in stainless steel wire for welding include oxygen, sulfur, aluminum, calcium, boron, and cobalt. Their influence on welding is mainly manifested in spatter during welding, weld formation, and weld crack sensitivity. In the existing stainless steel wire standards for welding, there is no regulation on the content of trace elements. The manufacturers of stainless steel wire rods for welding have to explore the content of trace elements according to the requirements of use and steel types. Since the influence of trace elements on stainless steel for welding is not clear, Moreover, there are many types of stainless steel wire rods for welding, and it is very difficult to determine the content of trace elements in specific steel types. If the trace elements in stainless steel welding materials are not p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C22C38/40C22C33/04
Inventor 王辉绵
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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