770MPa-level high-strength steel non-preheating gas protection welding wire

A technology of gas-shielded welding wire and high-strength steel, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., and can solve the problems of reducing production efficiency, increasing welding construction costs, and difficulty in ensuring welding quality, etc.

Inactive Publication Date: 2018-09-07
上海连山金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, preheating before welding has problems such as reducing production efficiency, increasing welding construction costs, and difficulty in ensuring welding quality.

Method used

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  • 770MPa-level high-strength steel non-preheating gas protection welding wire
  • 770MPa-level high-strength steel non-preheating gas protection welding wire
  • 770MPa-level high-strength steel non-preheating gas protection welding wire

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Embodiment Construction

[0027] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with a preferred embodiment, it does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present invention. The following description contains numerous specific details in order to provide a thorough understanding of the present invention. The invention may also be practiced without these details. Also, some specific details will be omitted from the description in order to avoid obscuring or obscuring the gist of the present invent...

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Abstract

The invention provides a 770MPa-level high-strength steel non-preheating gas protection welding wire. Chemical components of the welding wire comprise 0.006wt%-0.040wt% of C, 0.500wt%-0.600wt% of Si,1.45wt%-1.49wt% of Mn, 0.800wt%-0.900wt% of Ni, 0.080wt%-0.120wt% of Ti, 0.300wt%-0.400wt% of Mo, 0.300wt%-1.80wt% of W and the balance Fe and inevitable impurity elements. The welding wire has the excellent mechanical property and processing property and the excellent welding seam metal anti-cold-cracking property and is suitable for non-preheating welding with the environment temperature not lower than 10 DEG C, the welding environment is greatly improved, the welding efficiency is improved, and the welding manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a welding material, in particular to a 770MPa high-strength steel non-preheating gas shielded welding wire. Background technique [0002] The welding application of high-strength steel has achieved very significant economic and social benefits in various fields of industrial production and national defense construction. The main characteristics of this type of steel are high strength, good toughness and plasticity, and are widely used in the manufacture of pressure vessels, engineering machinery, bridges, ships, various vehicles and other steel structures. [0003] The welding process of the production of high-strength steel is the key to the comprehensive performance of the hydraulic support, and the crack tendency of the welded joint is an important problem in the welding of high-strength steel. High-strength steel is usually preheated before welding to prevent cold cracks during welding. The preheating temperature varies d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/3073
Inventor 不公告发明人
Owner 上海连山金属材料有限公司
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