Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of steel/niobium laser welding method

A technology of laser welding and welding process, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., it can solve the problems of low joint strength and complex process, and achieve high production efficiency, simple process and small heat input. Effect

Active Publication Date: 2017-09-15
HUAWEI TEHCHNOLOGIES CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to solve the problems of low joint strength and complicated process in the existing steel / niobium welding method, the present invention provides a steel / niobium laser welding method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of steel/niobium laser welding method
  • A kind of steel/niobium laser welding method
  • A kind of steel/niobium laser welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) The base metal is Nb521 alloy and 304 austenitic stainless steel (304ss), with a size of 50mm×25mm×2mm;

[0023] (2) Polish the surface of the stainless steel plate and niobium plate with 80# water-resistant sandpaper to remove the surface oxide film and oil stains, and then use absorbent cotton to dip acetone and alcohol to clean the surface of the test piece to ensure that the surface of the material is clean and free of pollution;

[0024] (3) Place the stainless steel plate and the niobium plate horizontally to form the part to be welded, clamp and fix the part to be welded at both ends, so that the gap between the steel / niobium butt surface is less than 0.15mm;

[0025] (3) The partial beam welding process is used for welding, that is, the center of the laser beam spot is biased from the steel / niobium butt joint to the stainless steel side for welding: partial beam distance d a =0.5mm, laser power P=2kW, welding speed v=1.2m / min, defocus △f=0; welding main shie...

Embodiment 2

[0028] The welding method of this embodiment is basically the same as that of Embodiment 1, the difference is that the deflection distance d in this embodiment a = 0.3 mm. According to the tensile test, the tensile strength of the joint welded in this embodiment is 187MPa.

Embodiment 3

[0030] The welding method of this embodiment is basically the same as that of Embodiment 1, the difference is that the deflection distance d in this embodiment a = 0.2 mm. According to the tensile test, the tensile strength of the joint welded in this embodiment is 199MPa.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a steel / niobium laser welding method, belongs to the field of dissimilar metal welding, and is used for solving the problems of low joint strength and complex process in a traditional steel / niobium welding method. According to the method, firstly, a steel plate and a niobium plate are placed in a horizontal butt joint manner to form a part to be welded; then, the part to be welded is clamped and fixed from the two ends; and an offset beam welding process is adopted for welding the part to be welded, that is, the light spot center of a laser beam is deflected to the side, facing the steel plate part, of the steel / niobium butt joint surface for welding the part to be welded . The steel / niobium laser welding method is simple in process and high in production efficiency, and is a novel steel / niobium welding method having high development potential. The steel / niobium laser welding method is suitable for steel and niobium or niobium alloy welding.

Description

technical field [0001] The invention belongs to the field of dissimilar metal welding, and in particular relates to a steel / niobium laser welding method. Background technique [0002] The steel / niobium composite welded structure can increase the working temperature of the aero-engine, reduce its weight, make the aero-engine have a higher thrust-to-weight ratio, and has broad application prospects in the aerospace field. However, niobium is an active metal, and when it is welded with most metals, a large number of continuously distributed brittle intermetallic compounds are easily formed in the joint. The difference in thermophysical properties leads to greater thermal stress on the joints. The combination of the above two factors will significantly reduce the strength of the joint, and even cracks will occur after welding. At present, the method of presetting the intermediate layer is generally used to improve the joint strength. However, this method has a limited effect ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/14B23K26/323
CPCB23K26/14B23K2103/18
Inventor 石铭霄陈书锦周方明马纪龙李慧
Owner HUAWEI TEHCHNOLOGIES CO LTD