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A 3D printing repair ink material and method suitable for rolling steel

A technology of 3D printing and repairing method, applied in the field of 3D printing, can solve the problems that the effect of repair welding is difficult to meet the requirements of raw materials, the mechanical properties of the substrate are reduced, and the quality of steel is affected, so as to reduce the solidification temperature range, prevent liquefaction cracks and prevent liquefaction cracks. The effect of reheating cracks and avoiding solidification cracks

Active Publication Date: 2021-08-10
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the quality of rolled steel in China is relatively good, but due to the influence of environment, raw materials, operation and other factors in actual production, individual defects (porosity, porosity, slag inclusion, etc.) will still appear on the surface, body and edge of the steel. This will have a certain impact on the quality of the steel, and it is more difficult to perform conventional repairs (such as repair welding); for some special steels, the effect of repair welding ), the mechanical properties of the base material will decrease accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Ink material preparation: Weigh the powder materials of various components, and then mix them so that the final ink material contains C: 0.4wt%, Fe: 89wt%, Si: 0.2wt%, Mn: 3wt%, Cr: 2wt% %, V: 0.4wt%, W: 1wt%, Ti: 1wt%, the rest are impurities, of which P≤0.002wt%, S≤0.001wt%;

[0020] 2. Pretreatment: Grinding and cleaning the defects of the rolled steel to eliminate impurities on the defect surface that affect the printing quality, such as rust, oil, dust, water mist, etc.

[0021] 3. Repair: Put the ink material into the powder supply box of the 3D printing equipment ProX100 (DMP) printer, and use the selective laser sintering technology to form metal condensation on the ink material at the steel defect to fill the defect.

[0022] The specific method is: spread the ink material powder on the surface of the steel defect, and scrape it flat; use a high-intensity CO2 laser to scan the section of the part on the new layer just laid. Using the computer to control the...

Embodiment 2

[0026] 1. Ink material preparation: Weigh the powder materials of various components, and then mix them so that the final ink material contains C: 0.4wt%, Fe: 89wt%, Si: 0.2wt%, Mn: 3wt%, Cr: 2wt% %, V: 0.4wt%, W: 1wt%, Ti: 1wt%, the rest are impurities, of which P≤0.002wt%, S≤0.001wt%;

[0027] 2. Pretreatment: Grinding and cleaning steel defects to eliminate impurities that affect printing quality, such as rust, oil, dust, water mist, etc.;

[0028] 3. Repair: Put the ink material into the powder supply cylinder of the 3D printing equipment EOSINTM270 printer, and use the laser selective melting technology to form metal condensation on the ink material at the defect of the steel to fill the defect.

[0029] The specific method is: first spread the ink material powder on the surface of the steel defect, start scanning with the laser beam, and then the laser beam will selectively melt the powder on the substrate according to the information of the current layer, process the ou...

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PUM

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Abstract

The invention discloses a 3D printing repair ink material and method suitable for rolling steel products. The ink material is a powder material, which is characterized in that it contains: C: 0.4wt%, Fe: 89wt%, Si: 0.2wt%, Mn : 3wt%, Cr: 2wt%, V: 0.4wt%, W: 1wt%, Ti: 1wt%, and the rest are impurities. The 3D printing process uses a selective laser sintering process or a laser selective melting process. The invention uses a reasonable 3D printing process to clad the metal powder on the repaired surface, restore the geometric size of the base material without changing the physical and chemical properties.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for repairing defects in rolled steel. Background technique [0002] 3D printing technology (additive manufacturing technology) is an emerging manufacturing technology based on digital models that accumulate materials layer by layer to produce physical objects. It reflects the close combination of information network technology, advanced material technology and digital manufacturing technology. It is an advanced manufacturing technology. important part of the industry. After years of development, my country's additive manufacturing technology has basically synchronized with the world's advanced level, and has reached the international advanced level in some technical fields such as additive manufacturing of high-performance complex large-scale metal load-bearing components. Melting, laser near-net forming, fused deposition forming, electron beam selective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B22F1/00B22F7/06C22C38/02C22C38/22C22C38/24C22C38/28C22C38/38C23C24/10B33Y70/00
CPCB22F1/0003C22C38/02C22C38/22C22C38/24C22C38/28C22C38/38C23C24/103B22F7/062B33Y70/00B22F10/00B22F10/28Y02P10/25
Inventor 李松李东晖汪晶洁吴君明田浩
Owner NANJING IRON & STEEL CO LTD
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