阅读说明：本技术 一种激光复合制造炉卷辊抗高温氧化功能层合金材料及工艺方法 (High-temperature oxidation resistant functional layer alloy material for laser composite manufacturing furnace roller and process method ) 是由 王晓佳 陈海涛 董思远 于 2021-08-18 设计创作，主要内容包括：本发明属于表面处理技术领域,涉及一种激光熔覆合金功能层材料,特别是涉及一种激光复合制造炉卷辊抗高温氧化功能层合金材料及工艺方法。一种激光复合制造炉卷辊抗高温氧化功能层合金材料,该合金材料包括以下质量百分数的组分组成：Cr：18.0%～29.0%,Al：5.0%～10.0%,Y：0.1%～1.0%,Si：0.5%～1.0%,Ni：余量。本发明提供一种激光复合制造炉卷辊抗高温氧化功能层合金材料,该合金材料以镍基合金为基体,加入Al和Y元素,使合金表面形成一层致密的氧化膜,同时加入Cr元素保证耐腐蚀性,再加上采用激光熔覆的方法,可以细化组织,进而提升炉卷辊表面抗高温氧化结瘤能力。(The invention belongs to the technical field of surface treatment, relates to a laser cladding alloy functional layer material, and particularly relates to a high-temperature oxidation resistant functional layer alloy material for a laser composite manufacturing furnace roller and a process method. The high-temperature oxidation resistant functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0%, Ni: and (4) the balance. The invention provides a high-temperature oxidation resistant functional layer alloy material for a laser composite manufacturing furnace roller, which takes a nickel-based alloy as a matrix, and is added with Al and Y elements to form a layer of compact oxide film on the surface of the alloy, and simultaneously added with Cr elements to ensure corrosion resistance.)

1. The high-temperature oxidation resistant functional layer alloy material for the laser composite manufacturing furnace roller is characterized by comprising the following components in percentage by mass: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0%, Ni: and (4) the balance.

2. The preparation method of the high-temperature oxidation resistant functional layer of the laser composite manufacturing furnace roller is characterized by comprising the following steps of:

step 1, presetting a layer of transition layer material with the thickness of 1.2-1.5mm on the surface of a furnace roller in a mode of presetting Ni-Cr-Mo alloy powder, selecting a fiber laser for scanning cladding, and then processing to reserve the thickness of the transition layer to be 1.0-1.2 mm;

and 2, selecting a fiber laser, and performing laser cladding on functional layer alloy powder on the transition layer in a powder presetting mode, wherein the cladding process comprises the following steps: power: 2000-: 3.0mm, a focal length of 280-350mm, a scanning speed of 1000-1200mm/min, a single-layer thickness of 0.6-0.8mm, and a lap joint rate of 40-60%.

3. The method for preparing the high-temperature oxidation resistant functional layer of the laser composite manufacturing furnace roller according to claim 2, wherein the Ni-Cr-Mo alloy powder in the step 1 comprises the following components: c: 0.05% -0.2%, Cr: 18.0% -25.0%, Mo: 5.0% -10.0%, Al: 0.1% -1.0%, Nb: 3.0% -5.0%, Cu: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 0.1% -1%, Fe: 4.0% -6.0%, Ni: and (4) the balance.

4. The method for preparing the high-temperature oxidation resistant functional layer of the laser composite manufacturing furnace roller according to claim 2, wherein the functional layer alloy powder in the step 2 comprises the following components: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0% and the balance of Ni.

Technical Field

The invention belongs to the technical field of surface treatment, relates to a laser cladding alloy functional layer material, and particularly relates to a high-temperature oxidation resistant functional layer alloy material for a laser composite manufacturing furnace roller and a process method.

Background

The furnace roller is a key part when rolling the plate coil, and because the furnace roller is in contact with the steel coil for a long time at high temperature, the roller surface has a large number of defects such as cracks, oxidation, nodulation, pits and the like, thereby directly influencing the surface quality of the steel coil, particularly causing the scrapping of the head and the tail of the plate coil and reducing the yield. Therefore, the high-temperature oxidation-resistant furnace coil roller has great significance for improving the product quality and developing the steel plate coil rolling technology.

At present, the furnace roller which is off-line and needs to be repaired is mainly repaired in a surfacing mode and also repaired in a spraying mode. However, the roller surface repaired by the surfacing mode has obvious stress cracks, even closed cracks, and incompact tissues, is easy to peel off, and has poor high-temperature oxidation resistance. The roller surface is repaired in a spraying mode, although some materials with strong oxidation resistance can be sprayed, the interface bonding force is weak, the coating is thin, and the coating is easy to crack and peel under the action of high temperature and contact with the plate coil.

The laser cladding technology is an efficient and convenient surface modification technology and has the following advantages: (1) the dilution rate of the cladding layer is low; (2) the heat influence on the base material is small; (3) the thickness of the cladding layer is controllable; (4) the interface bonding force is strong; (5) the tissue is fine and compact. The laser cladding process is adopted to clad the functional layer, so that the coating has high interface binding force, the coating is prevented from peeling off, a compact tissue structure can be obtained, and the oxidation resistance and the anti-adhesion nodulation capability are improved. More importantly, the high-temperature oxidation-resistant functional layer of the laser composite manufacturing furnace roller can meet the requirement of long-time use at high temperature, the oxidation nodulation of the roller surface is reduced, and the head and tail quality of the rolled plate is further improved.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a high-temperature oxidation resistant functional laminated alloy material for a laser composite manufacturing furnace roller through repeated research and a large number of experiments.

In order to achieve the purpose, the invention adopts the following technical scheme.

The high-temperature oxidation resistant functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0%, Ni: and (4) the balance.

A preparation method of a high-temperature oxidation resistant functional layer of a laser composite manufacturing furnace roller comprises the following steps:

step 1, presetting a layer of transition layer material with the thickness of 1.2-1.5mm on the surface of a furnace roller in a mode of presetting Ni-Cr-Mo alloy powder, selecting a fiber laser to carry out scanning cladding, and then processing and reserving the thickness of the transition layer to be 1.0-1.2 mm.

And 2, selecting a fiber laser, and performing laser cladding on functional layer alloy powder on the transition layer in a powder presetting mode, wherein the cladding process comprises the following steps: power: 2000-: 3.0mm, a focal length of 280-350mm, a scanning speed of 1000-1200mm/min, a single-layer thickness of 0.6-0.8mm, and a lap joint rate of 40-60%.

Further, the Ni-Cr-Mo alloy powder in the step 1 comprises the following components: c: 0.05% -0.2%, Cr: 18.0% -25.0%, Mo: 5.0% -10.0%, Al: 0.1% -1.0%, Nb: 3.0% -5.0%, Cu: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 0.1% -1%, Fe: 4.0% -6.0%, Ni: and (4) the balance.

Further, the functional layer alloy powder in the step 2 comprises the following components: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0% and the balance of Ni.

Compared with the prior art, the invention has the beneficial effects of.

(1) The functional layer alloy material has a certain content of Al element, so that a layer of compact oxide film is formed on the surface of the alloy, and the high-temperature oxidation resistance of the roller surface at high temperature can be improved; the grain of the functional layer can be refined by a certain content of Y element, and the strength is improved.

(2) By adopting a laser cladding mode, good metallurgical bonding with a matrix can be formed, the structure is refined, the interface bonding force is improved, and the defects of peeling, crack reduction and the like are avoided.

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The high-temperature oxidation resistant functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0%, Ni: and (4) the balance.

A preparation method of a high-temperature oxidation resistant functional layer of a laser composite manufacturing furnace roller comprises the following steps:

step 1, presetting a layer of transition layer material with the thickness of 1.2-1.5mm on the surface of a furnace roller in a mode of presetting Ni-Cr-Mo alloy powder, selecting a fiber laser to carry out scanning cladding, and then processing and reserving the thickness of the transition layer to be 1.0-1.2 mm.

And 2, selecting a fiber laser, and performing laser cladding on functional layer alloy powder on the transition layer in a powder presetting mode, wherein the cladding process comprises the following steps: power: 2000-: 3.0mm, a focal length of 280-350mm, a scanning speed of 1000-1200mm/min, a single-layer thickness of 0.6-0.8mm, and a lap joint rate of 40-60%.

Further, the Ni-Cr-Mo alloy powder in the step 1 comprises the following components: c: 0.05% -0.2%, Cr: 18.0% -25.0%, Mo: 5.0% -10.0%, Al: 0.1% -1.0%, Nb: 3.0% -5.0%, Cu: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 0.1% -1%, Fe: 4.0% -6.0%, Ni: and (4) the balance.

Further, the functional layer alloy powder in the step 2 comprises the following components: cr: 18.0% -29.0%, Al: 5.0% -10.0%, Y: 0.1% -1.0%, Si: 0.5% -1.0% and the balance of Ni.

Example 1.

1. Removing factors influencing cladding quality such as oil stain, oxides, fatigue layers, surface cracks and the like on the surface of the furnace roller, cladding a layer of transition layer alloy material at a specified position by using a fiber laser, and keeping the thickness of 1.0mm after processing.

2. Scanning and cladding a functional layer on the transition layer by using a laser cladding technology and a powder presetting mode, wherein the functional layer comprises the following alloy components in percentage by mass: cr: 25.0%, Al: 7.5%, Y: 0.4%, Si: 0.8%, Ni: and (4) the balance. Cladding thickness is 0.8 mm.

3. And processing the functional layer after cladding, and keeping the thickness of 0.6 mm.

Example 2.

1. Removing factors influencing cladding quality such as oil stain, oxides, fatigue layers, surface cracks and the like on the surface of the furnace roller, cladding a layer of transition layer alloy material at a specified position by using a fiber laser, and keeping the thickness of 1.0mm after processing.

2. Scanning and cladding a functional layer on the transition layer by using a laser cladding technology and a powder presetting mode, wherein the functional layer comprises the following alloy components in percentage by mass: cr: 23.0%, Al: 8.0%, Y: 0.5%, Si: 0.7%, Ni: and (4) the balance. Cladding thickness is 0.7 mm.

3. And processing the functional layer after cladding, and keeping the thickness of 0.5 mm.

The furnace roller after cladding the functional layer has good metallurgical bonding and uniform hardness. After the roll is used in a machine, after the roll is used at a high temperature for a long time, the surface oxidation resistance is good, no crack defect exists, the probability of roll surface nodulation is reduced, the quality of the head and the tail of the plate roll is obviously improved, the rejection rate is reduced, and the using effect is more than 3 times that of the original method for repairing the roll surface.