Ultrahigh-strength full-austenite stainless steel welding wire

A fully austenitic, ultra-high-strength technology, used in welding media, welding equipment, welding/cutting media/materials, etc., to achieve excellent toughness, simplified welding process, and good market prospects.

Inactive Publication Date: 2013-03-13
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an ultra-high-strength all-austenitic stainless steel welding wire, which has high welding efficiency, excellent manufacturability, and good crack resistance, solves the problems existing in existing welding wires, and is more suitable for high-strength and high-toughness requirements. High rigid structure welding and welding of high-strength and high-hardness difficult-to-weld steels

Method used

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  • Ultrahigh-strength full-austenite stainless steel welding wire
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  • Ultrahigh-strength full-austenite stainless steel welding wire

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Embodiment Construction

[0027] Below in conjunction with embodiment this patent is further explained and illustrated. But the scope of protection of this patent is not limited to the specific implementation.

[0028] The chemical composition of the welding wire used in the example is shown in Table 1, and the specification of the welding wire is φ1.0mm. The steel plate used in the test is 10CrNi5MoV steel with a thickness of 26 mm. The welding process is shown in Table 2, and 95% Ar+5% CO is used. 2 As the shielding gas, see Table 3 for the comparison data of the connection efficiency improvement.

[0029] Table 1 Chemical composition (wt%) of welding wire of the present invention

[0030] C Si mn Cr Ni Mo N V S P Fe Example 1 0.053 0.54 4.65 15.50 21.43 5.56 0.255 0.153 0.0066 0.011 margin Example 2 0.091 0.90 5.08 16.02 19.06 5.10 0.304 0.220 0.0092 0.006 margin Example 3 0.078 0.50 4.65 18.05 21.36 5.18 0....

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Abstract

The invention provides an ultrahigh-strength full-austenite stainless steel welding wire, comprising the following chemical components in mass percentage of: 0.05-0.11% of C, 0.50-0.90% of Si, 4.0-6.0% of Mn, 16.0-19.0% of Cr, 19.0-22.0% of Ni, 5.0-6.5% of Mo, 0.25-0.35% of N, 0.15-0.30% of V, less than or equal to 0.010% of S, less than or equal to 0.015% of P and the residue of Fe. The smelting metal of the welding wire not only has the ultrahigh tensile strength, but also has good toughness; the tensile strength Rm is 735-790 MPa and KV2 reaches to 110-140 J at 20 DEG C below zero; the manufacturability is good; compared with a previously-matched manual electric welding strip, the welding efficiency of the welding wire is improved by more than 100%; and the welding without pre-heating at higher than 0 DEG C is realized and a welding process is simplified.

Description

technical field [0001] The invention relates to the technical field of welding wire, in particular to a welding wire for an ultra-high-strength full austenitic stainless steel gas metal shielded welding process. Background technique [0002] 10CrNi5MoV steel is a 780MPa high-strength low-alloy steel, which is widely used in ships and weaponry. However, due to the high degree of alloying of the steel, it is very sensitive to welding heat cycles and cold cracks. In order to ensure the safety of the structure and prevent welding cold cracks, all austenitic welding consumables must be used for welding parts with high rigidity and large restraint. At present, the fully austenitic welding consumables for 10CrNi5MoV steel are manual electric welding electrodes. After years of improvement, the manufacturability of this electrode has been greatly improved, and it has been used in real ship construction. However, there are several important problems with this electrode: (1) Low weldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 霍光瑞牛继承王任甫
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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