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High-crack-resistance nickel-based surfacing alloy

A high crack resistance, nickel-based technology, applied in the direction of welding medium, welding equipment, metal processing equipment, etc., to achieve the effect of improved thermal expansion coefficient, excellent resistance to crack initiation, and improved service life

Inactive Publication Date: 2018-09-14
张宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a nickel-based surfacing alloy that resists surface fatigue cracks, thereby solving the problem of surface cracks on the compression rollers of the crystallizer sector, and can significantly improve the service life of the compression rollers

Method used

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  • High-crack-resistance nickel-based surfacing alloy
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  • High-crack-resistance nickel-based surfacing alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0043] The powdered material was prepared, and the chemical composition is shown in Table 1.

[0044] The continuous surfacing test was carried out on a continuous casting roll with a diameter of 180mm and a length of 1200mm. The continuous casting roll rotated 1.4 times per minute, the heating temperature was 500°C, and the water cooling temperature was set at 300°C. The crack resistance performance is shown in Table 2.

[0045] Examples 1 and 2 respectively adopt laser and arc heat sources for surfacing welding.

[0046] The samples were taken for high-temperature wear and strength tests, and the results are shown in Tables 3 and 4.

Embodiment 3-4

[0048] The surfacing welding wire was made, and the chemical composition is shown in Table 1.

[0049] The continuous surfacing test was carried out on a continuous casting roll with a diameter of 180mm and a length of 1200mm. The continuous casting roll rotated 1.4 times per minute, the heating temperature was 500°C, and the water cooling temperature was set at 300°C. The crack resistance performance is shown in Table 2.

[0050] Examples 3 and 4 respectively adopt submerged arc welding and gas shielded welding for surfacing welding.

[0051] The samples were taken for high-temperature wear and strength tests, and the results are shown in Tables 3 and 4.

Embodiment 5-6

[0053]The surfacing welding strip is made, and the chemical composition is shown in Table 1.

[0054] The continuous surfacing test was carried out on a continuous casting roll with a diameter of 180mm and a length of 1200mm. The continuous casting roll rotated 1.4 times per minute, the heating temperature was 500°C, and the water cooling temperature was set at 300°C. The crack resistance performance is shown in Table 2.

[0055] Examples 5 and 6 adopt submerged arc and electroslag surfacing methods for surfacing respectively.

[0056] The samples were taken for high-temperature wear and strength tests, and the results are shown in Tables 3 and 4.

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PUM

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Abstract

The invention relates to high-crack-resistance nickel-based surfacing alloy, comprising, by weight, 9-15% of Mo, 5-12% of Co, 5-12% of Cr, 0.3-1.2% of Al, 0.5-2.0% of Ti, 0.05-0.3% of Nb, and the balance of Ni and impurity elements, with (Al+Nb)< / =Ti / 2, W=1.5-4%, and Mo / 6< / =W< / =Mo / 3. The high-crack-resistance nickel-based surfacing alloy may be in powder, line, or sheet shape, and is applicable tosurfacing repairing of parts that bear high-temperature high-pressure service environments, such as continuous casting rollers.

Description

technical field [0001] The invention relates to a high-crack-resistant nickel-based surfacing alloy, which belongs to the field of welding technology, in particular to a nickel-based surfacing alloy for high-temperature and high-pressure service environments Background technique [0002] Many work rolls are used in the steel manufacturing process, such as for the work of compressing continuous casting billets in the mold, rolls for steel rolling, and various backup rolls and auxiliary rolls that do not come into direct contact with the steel. The continuous casting billet compression roller in the crystallizer needs to withstand the high temperature of up to 1400°C due to direct contact with the high temperature billet; at the same time, it also needs to withstand the strong spray from the cooling water, so the continuous casting billet compression roller will withstand high temperature and low temperature The cyclic heat action will easily produce thermal fatigue cracks on ...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/3033
Inventor 张宇
Owner 张宇
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