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A kind of additive manufacturing method of cast iron roll

A cast iron roll and additive manufacturing technology, which is applied in the field of metal surface treatment, can solve problems such as the inability to complete the additive manufacturing of cast iron rolls and cracks on the surface of cast iron rolls, and achieve the effects of increased service life, small heat input, and material saving

Active Publication Date: 2020-05-19
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for additive manufacturing of cast iron rolls, which solves the problems in the prior art that the surface of cast iron rolls is cracked due to the large heat input in the welding process, and the work of additive manufacturing of cast iron rolls cannot be completed.

Method used

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  • A kind of additive manufacturing method of cast iron roll
  • A kind of additive manufacturing method of cast iron roll
  • A kind of additive manufacturing method of cast iron roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Turning to remove the wear fatigue layer on the surface of the scrapped cast iron roll, the amount of unilateral turning is 0.5mm; use absolute ethanol to clean the surface of the turned cast iron roll to remove impurities such as oil stains; conduct non-destructive testing on the cast iron roll, using magnetic particle inspection and ultrasonic flaw detection , check whether there are defects such as surface and internal cracks in the cast iron roll; after the inspection is qualified, the surface of the cast iron roll that has undergone the above pretreatment is welded by CMT technology (the welding wire adopts D506 welding wire, the diameter of the welding wire is 1.2mm, and the wire feeding speed is 4.5mm / min, welding speed is 24mm / min, torch angle is 0°, dry elongation is 12mm, gap is 1.2mm, shielding gas is 90% argon + 10% CO 2, the gas flow rate is 15L / min), through multi-layer welding, a surface weld layer is formed on the cast iron roll, so that the thickness of...

Embodiment 2

[0042] The wear and fatigue layer on the surface of the scrapped cast iron roll is removed by turning, and the amount of unilateral turning is 1mm; the surface of the cast iron roll after turning is cleaned with absolute ethanol to remove impurities such as oil stains; non-destructive testing is carried out on the cast iron roll, using magnetic particle inspection and ultrasonic flaw detection, Check whether there are defects such as surface and internal cracks in the cast iron roll; after the inspection is qualified, the surface of the cast iron roll that has undergone the above pretreatment is welded by CMT technology (the welding wire adopts D506 welding wire, the diameter of the welding wire is 1.2mm, and the wire feeding speed is 4.5mm / min. The welding speed is 30mm / min, the torch angle is 0°, the dry elongation is 15mm, the gap is 1.2mm, and the shielding gas is 90% argon + 10% CO 2 , the gas flow rate is 15L / min), through multi-layer welding, a surface welding layer is f...

Embodiment 3

[0044] Turning to remove the wear fatigue layer on the surface of the scrapped cast iron roll, the amount of unilateral turning is 0.5mm; use absolute ethanol to clean the surface of the turned cast iron roll to remove impurities such as oil stains; conduct non-destructive testing on the cast iron roll, using magnetic particle inspection and ultrasonic flaw detection , check whether there are defects such as surface and internal cracks in the cast iron roll; after the inspection is qualified, the surface of the cast iron roll that has undergone the above pretreatment is welded by CMT technology (the welding wire adopts D506 welding wire, the diameter of the welding wire is 1.2mm, and the wire feeding speed is 4.5mm / min , the welding speed is 26mm / min, the torch angle is 0°, the dry elongation is 13mm, the gap is 1.2mm, and the shielding gas is 90% argon + 10% CO 2 , the gas flow rate is 15L / min), through multi-layer welding, a surface welding layer is formed on the cast iron ro...

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Abstract

The invention belongs to the technical field of metal surface treatment, in particular to an additive manufacturing method for cast iron rolls. The invention adopts a composite additive manufacturing process combining CMT technology and laser cladding, the heat input in the welding process is small, and the manufactured cast iron roll has a uniform surface cladding layer, and the surface cladding layer has a sequential arrangement and a dense crystal structure. The cast iron roll after material addition has better corrosion resistance and high temperature resistance, and significantly improves the service life of the cast iron roll; as can be seen from the examples, the wear resistance of the cast iron roll manufactured by the method of the present invention is better than that of the quenched 45 steel test The wear resistance of the sample is 8 times higher.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an additive manufacturing method for cast iron rolls. Background technique [0002] In recent years, with the rapid development of modern industry and large-scale infrastructure construction, the demand for steel (especially high-quality steel) is increasing day by day. As a key component of the rolling mill, rolls play a pivotal role in improving the quality of steel products, especially cast iron rolls, which are widely used in roll production, because they have good comprehensive mechanical properties, lower prices than forged steel and semi-steel, and wear-resistant Due to its excellent performance, it has been widely used. In the normal rolling process, the consumption of cast iron rolls is mainly due to wear and fatigue. After one cycle of work, cast iron rolls need to be turned or ground before they can be used again. After several times of turning and gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105C22C38/02C22C38/22C23C24/10B33Y10/00B23K9/04B23K9/16B23K9/235
CPCC23C24/103C22C38/02C22C38/22B33Y10/00B23K9/044B23K9/16B23K9/235B22F10/00B22F10/36B22F10/25B22F10/38B22F10/50Y02P10/25
Inventor 付宇明付晨张钰郑丽娟
Owner 合肥九州龙腾科技成果转化有限公司
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