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Method of laser cutting a steel

A laser cutting and laser technology, which is applied in laser welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems such as the degradation of the cutting quality of experimental boards

Pending Publication Date: 2021-07-30
ARCELORMITTAL INVESTIGACION Y DESARROLLO SL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, contrary to the results of rolled and blasted mill plates, Cr was found to degrade the cut quality of the experimental plates even when Cu and Ni were present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] One mild steel that is commonly cut by laser is ASTM A36 type steel for structural applications. The composition specifications of A36 mild steel plate are in weight %: C: up to 0.29; Mn: 0.80 to 1.20; P: up to 0.04; S: up to 0.05; Si: up to 0.40, (preferably for thicker plates 0.15 to 0.40). The steel must have a minimum yield strength of 250 MPa.

[0011] Another type of steel that can be cut by laser is ASTM A572 type steel. The composition specifications of A572 are in weight %: C: up to 0.26; Mn: 0.50 to 1.35; P: up to 0.04; S: up to 0.05; Si: up to 0.40, (preferably 0.15 to 0.40 for thicker plates). The steel must have a minimum yield strength of 290 MPa.

[0012] The present invention is a method for laser cutting improved laser cutable versions of such A36 and A572 steels. The method of the present invention includes providing a steel cutting laser, and providing a steel sheet or steel plate having the following broad compositional ranges: C: 0.01 to 0.29; Mn...

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PUM

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Abstract

A method for laser cutting a steel alloy sheet / plate having a composition comprising, in wt. %: C: 0.01 - 0.29; Mn: 0.50 -1.35; P: 0.04 max; S: 0.05 max; Si: 0.40 max; Cr: 0.5 - 0.75, and the remainder being iron and impurities, the steel alloy is free from intentional additions of Cu and Ni and containing less than 0.05% of total cumulated amounts of Cu and Ni.

Description

technical field [0001] The present invention relates to methods of laser cutting soft / low alloy steels, and more particularly to methods of cutting soft / low alloy steels suitable for laser cutting. In particular, the invention relates to a method for laser cutting soft / low alloy steels suitable for laser cutting with improved cut quality. Background technique [0002] Laser cutting and laser fine cutting are suitable for different kinds of materials where complex contours need to be processed precisely, quickly and force-free. The laser produces narrow kerfs (slits formed by cutting) and thus enables high-precision cutting. Because components experience little heat input and can often be cut without dross, this method results in minimal distortion and in many cases requires no post-processing. [0003] Almost all kinds of metals can be laser cut: mild steel, stainless steel and aluminum are the most common applications. Other laser-cut parts are made of wood, plastic, gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02B23K26/00B23K26/38C22C38/04C22C38/18B23K26/40B23K103/04
CPCB23K26/38B23K26/40B23K2103/04C22C38/02C22C38/04C22C38/18C22C38/002C22C38/42
Inventor 穆拉利·马诺哈尔
Owner ARCELORMITTAL INVESTIGACION Y DESARROLLO SL