阅读说明：本技术 一种激光复合制造炉卷辊抗高温氧化、防压入结瘤功能层合金材料及工艺方法 (High-temperature oxidation-resistant and press-in nodule-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,特别是涉及一种激光复合制造炉卷辊抗高温氧化、防压入结瘤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、防压入结瘤功能层合金材料,该合金材料包括以下质量百分数的组分组成：C：1.5%～2.5%,Cr：20.0%～30.0%,Ta：5.0%～10.0%,Al：5.0%～10.0%,Y：0.5%～1.0%,Si：0.5%～1.0%,Co：余量。本发明提供一种激光复合制造炉卷辊抗高温氧化、防压入结瘤功能层合金材料,该合金材料以钴基合金为基体,加入Ta元素,增加C元素,形成硬度较高的碳化物,增加合金的高温红硬性,同时加入Al元素,形成高温氧化膜,再加入适量Si元素提升抗氧化能力,Y元素可以细化组织,Cr元素提升炉卷辊表面抗高温腐蚀能力。(The invention belongs to the technical field of surface treatment, and particularly relates to a high-temperature oxidation resistant and press-in nodule resistant functional layer alloy material for a laser composite manufacturing furnace roller and a process method. The high-temperature oxidation resistant and anti-pressing-in nodulation functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance. The invention provides a high-temperature oxidation resistant and anti-pressing nodule functional layer alloy material for a laser composite manufacturing furnace roller, which takes a cobalt-based alloy as a matrix, adds Ta element, increases C element, forms carbide with higher hardness, increases the high-temperature red hardness of the alloy, simultaneously adds Al element, forms a high-temperature oxidation film, adds a proper amount of Si element to improve the oxidation resistance, adds Y element to refine the structure, and improves the high-temperature corrosion resistance of the surface of the furnace roller by Cr element.)

1. The high-temperature oxidation resistant and anti-pressing-in nodulation functional layer alloy material for the laser composite manufacturing furnace roller is characterized by comprising the following components in percentage by mass: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

2. The preparation method of the high-temperature oxidation resistant and anti-pressing-in nodulation 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 Co-Cr-W alloy powder presetting mode, 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 and anti-pressing-in nodulation functional layer of the laser composite manufacturing furnace roller according to claim 2, wherein the Co-Cr-W alloy powder in the step 1 comprises the following components: c: 1.0% -2.0%, Cr: 25.0% -30.0%, W: 1.0% -5.0%, Mo: 0.5% -1.5%, Al: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 1.0% -1.5%, Fe: 1.0% -5.0%, Ni: 1.0% -5.0%, Co: and (4) the balance.

4. The method for preparing the high-temperature oxidation resistant and anti-pressing-in nodulation 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: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

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 and press-in nodule 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 steel 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 head and the tail of the steel coil rolling plate. Therefore, the furnace roller has good high-temperature red hardness, oxidation resistance and bonding resistance, and has important significance for improving the quality of the product, reducing the rejection rate 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 peeling phenomena, and has poor high-temperature oxidation resistance and high-temperature red hardness, a large amount of oxides and pits appear on the roller surface, and the roller surface reacts with a plate coil at high temperature to form nodules, so that the quality of the plate surface of the plate coil is influenced. The roller surface is repaired by a spraying mode, although some materials with high-temperature oxidation resistance and high-temperature red hardness can be sprayed, the interface bonding force is weak, the coating is thin, the coating is easy to crack and peel under the action of high temperature and plate coil contact, and the rolled plate is scraped to cause roller surface nodulation, rolled plate pits and pockmarks when the coating is peeled off and used.

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) fine and compact structure and excellent performance. The laser cladding process is adopted to clad the functional layer, so that the interface binding force is high, the coating is prevented from peeling off, a compact tissue structure can be obtained, the performance of the functional layer is improved, and the coating is pure. More importantly, the functional layer for resisting high-temperature oxidation and preventing the press-in of the laser composite manufacturing furnace roller can meet the oxidation resistance and red hardness of the furnace roller when the furnace roller is used at a high temperature for a long time, prevent the generation of roller surface pits, reduce the roller surface nodulation probability and further improve the head and tail quality of the rolled plate.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a functional laminated alloy material for resisting high-temperature oxidation and preventing press-in nodulation 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 and anti-pressing-in nodulation functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

A preparation method of a high-temperature oxidation resistant and anti-pressing-in nodulation 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 Co-Cr-W alloy powder presetting mode, selecting a fiber laser to carry out 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%.

Further, the components of the Co-Cr-W alloy powder in the step 1 are as follows: c: 1.0% -2.0%, Cr: 25.0% -30.0%, W: 1.0% -5.0%, Mo: 0.5% -1.5%, Al: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 1.0% -1.5%, Fe: 1.0% -5.0%, Ni: 1.0% -5.0%, Co: and (4) the balance.

Further, the functional layer alloy powder in the step 2 comprises the following components: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

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

(1) Ta element is added, C element is added, carbide with higher hardness is formed, the high-temperature red hardness of the functional layer alloy can be greatly improved, and oxides and impurities are prevented from being pressed into the surface of the roller.

(2) The Al element is added to form a high-temperature-resistant oxidation film, so that the high-temperature-resistant oxidation performance of the functional layer alloy can be greatly improved, the functional layer crystal grains can be refined by the Y element with a certain content, the adhesion is prevented, and the strength is improved.

(3) The addition of Si element can play a role in deoxidation and slagging during deposition, purify the functional layer and improve the oxidation resistance of the functional layer.

(4) 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 coating is prevented from peeling off.

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 and anti-pressing-in nodulation functional layer alloy material for the laser composite manufacturing furnace roller comprises the following components in percentage by mass: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

A preparation method of a high-temperature oxidation resistant and anti-pressing-in nodulation 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 Co-Cr-W alloy powder presetting mode, selecting a fiber laser to carry out 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%.

Further, the components of the Co-Cr-W alloy powder in the step 1 are as follows: c: 1.0% -2.0%, Cr: 25.0% -30.0%, W: 1.0% -5.0%, Mo: 0.5% -1.5%, Al: 0.1% -1.0%, Mn: 0.1% -1.0%, Si: 1.0% -1.5%, Fe: 1.0% -5.0%, Ni: 1.0% -5.0%, Co: and (4) the balance.

Further, the functional layer alloy powder in the step 2 comprises the following components: c: 1.5-2.5%, Cr: 20.0% -30.0%, Ta: 5.0% -10.0%, Al: 5.0% -10.0%, Y: 0.5% -1.0%, Si: 0.5% -1.0%, Co: and (4) the balance.

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: c: 2.0%, Cr: 24.0%, Ta: 10.0%, Al: 7.5%, Y: 0.8%, Si: 0.8%, Co: 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.

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: c: 1.9%, Cr: 25.0%, Ta: 9.0%, Al: 8.0%, Y: 1.0%, Si: 1.0%, Co: 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.

The metallurgical bonding of the surface of the furnace roller coated with the functional layer is good, the surface has no crack defect, and the hardness is higher than that of the original base material. After the roll is used on line, after the roll is used at high temperature for a long time, the surface oxidation resistance is good, the roll surface has no pits, and the nodulation condition is greatly reduced compared with the original roll surface, so that the quality of the head and the tail of the roll is obviously improved, the using effect is more than 3 times that of surfacing repair of the roll surface, and the rejection rate is greatly reduced.