Tailored blank laser welding method for titanium micro-alloying carbon manganese steel

A technology of alloying carbon-manganese steel and laser tailor welding, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low strength and toughness in the weld zone, restricted welding environment, and increased welding cost. Achieve the effect of reducing welding cost, short high temperature residence time, and reducing usage

Inactive Publication Date: 2016-12-21
SUZHOU UNIV
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Problems solved by technology

[0004] When laser tailor welding technology is applied to titanium microalloyed carbon-manganese steel, laser welding is performed under the protection of pure inert gas, and the microstructure of the weld zone forms a

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  • Tailored blank laser welding method for titanium micro-alloying carbon manganese steel

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Embodiment Construction

[0021] The core of the present invention is to provide a laser tailor welding method for titanium microalloyed carbon-manganese steel, which improves the structural strength and toughness of the weld zone, and at the same time reduces the welding cost and the constraints of the welding environment.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] The embodiment of the present invention provides a laser tailor welding method for titanium microalloyed carbon-manganese steel, which uses laser to weld th...

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Abstract

The invention discloses a tailored blank laser welding method for titanium micro-alloying carbon manganese steel. Laser is utilized to weld welding positions of titanium micro-alloying carbon manganese steel plates in air or in shielding gas which is a mixture of inert gas and oxygen gas. Weld zones obtained through the tailored blank laser welding method contain titanium elements obtained by melting base metal, titanium elements are oxidized and bonded with oxygen element provided by oxygen in shielding gas or air, formed titanium-containing oxides in proper size can just become nucleation points of acicular ferrite, full penetration welds of a mixed structure of acicular ferrite and martensite are obtained finally, and the welds have higher toughness than welds of a pure martensite structure obtained from pure inert gas. Compared with a method using pure inert gas rather than inert gas and oxygen mixed shielding gas or air, the method has the advantages that usage of inert gas is lowered, welding cost is reduced, and laser welding in air is unrestricted by welding surroundings.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser tailor welding method for titanium microalloyed carbon-manganese steel. Background technique [0002] Microalloyed steel is a typical high-strength steel, which has been widely used in automobiles, construction machinery, bridges, high-rise buildings and other fields. This type of steel mainly uses the characteristics of fine grain strengthening, precipitation strengthening, and solid solution strengthening of microalloying elements Nb, V, Ti, Mo, etc. to improve the strength of the steel. [0003] Welding is one of the main ways of joining this steel. As a welding technology with high energy density, laser tailor welding technology has the advantages of small heat input, high welding speed, large depth-to-width ratio of weld seam, high welding quality, and no need to add welding wire. Compared with traditional welding methods such as arc welding, Argon arc weldin...

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Application Information

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IPC IPC(8): B23K26/24B23K26/12B23K26/32B23K26/60
CPCB23K26/24B23K26/125B23K26/32B23K26/60
Inventor 王晓南张敏曾盼林章顺虎郑知陈长军胡增荣
Owner SUZHOU UNIV
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