Preparation method of high-wear-resistance material based on titanium-melting integrated penetration technology

Abstract

The invention relates to the technical field of modified metal materials, in particular to a preparation method of a high-wear-resistance material based on titanium-melting integrated penetration. Aiming at the problems that in the prior art, a stainless steel material is poor in wear resistance, and a modified coating is prone to falling off, the preparation method of the high-wear-resistance material based on the titanium-melting integrated penetration technology is provided and comprises the steps that a stainless steel base material is subjected to surface cleaning and transferred into a plasma nitriding furnace, the temperature is increased to 950-1050 DEG C, and heat preservation is conducted for 60-120 min; the negative bias voltage of 500 to 800 V is maintained for 60 to 120 minutes; the negative bias voltage is reduced to 200-400 V, nitrogen is introduced, and a reaction is carried out for 120-360 min; and introducing argon, cooling to below 150 DEG C along with the furnace under the argon atmosphere, then transferring to the outside of the plasma nitriding furnace, and naturally cooling to room temperature to obtain the high-wear-resistance material. The stainless steel base material is modified by adopting a modification method based on a titanium-melting integrated penetration technique, so that the wear resistance of the stainless steel material is improved, and meanwhile, the problem that a coating material falls off can be avoided.

Description

Technical Field

[0001] This invention relates to the field of modified metal materials technology, and in particular to a method for preparing a high wear-resistant material based on titanium fusion infiltration technology. Background Technology

[0002] Stainless steel is the mainstream material used in current technology for kitchen utensils such as knives and cookware. However, stainless steel has poor wear resistance, which means that the lifespan of knives, cookware, and other kitchen utensils made from it needs to be improved. Existing technologies also include improving wear resistance by applying wear-resistant coatings, but these coatings are prone to peeling and failure during subsequent use, and the improvement in wear resistance has not reached the ideal level.

[0003] For example, a Chinese invention patent application discloses a wear-resistant tool coating [application number: 202411874974.2]. The wear-resistant tool coating provided by this invention application is composed of three sublayers with different compositions and structures. The sublayer closely connected to the substrate is an AlCrBN layer. The sublayer closely connected above the AlCrBN sublayer is a TiAlN / AlCrBN nano-multilayer coating. The sublayer closely connected above the TiAlN / AlCrBN nano-multilayer coating is a TiAlSiN / AlCrBN nano-multilayer coating. The thicknesses of the three sublayers from bottom to top are 0.4~0.8μm, 0.6~1.2μm and 0.5~2μm, respectively. The thickness of the wear-resistant tool coating is 1.5~4μm.

[0004] This invention application employs a method of coating the surface of a knife with a wear-resistant coating to improve the overall wear resistance of the knife. However, as mentioned above, the coating is prone to peeling off during use, so this solution still needs further improvement. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a method for preparing a highly wear-resistant material based on titanium fusion infiltration technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: A method for preparing a high wear-resistant material based on titanium fusion infiltration technology includes the following steps: Step 1: Clean the surface of the stainless steel substrate to obtain a clean substrate; Step 2: Transfer the clean substrate obtained in Step 1 to a plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, then start the heating system, raise the temperature to 950-1050℃, and hold for 60-120 minutes. Step 3: Turn on the arc evaporation source of the titanium target and maintain a negative bias of 500-800V for 60-120 minutes; Step 4: Reduce the negative bias voltage to 200-400V and introduce nitrogen gas. React for 120-360 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0007] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, the specific steps for cleaning the stainless steel substrate surface in step one include: grinding the substrate surface until it is flat, then ultrasonically cleaning it with acetone and anhydrous ethanol in sequence, with each cleaning time being 15-20 minutes, and then transferring it to an oven for drying.

[0008] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, the surface roughness of the stainless steel substrate after surface polishing is 0.2-0.8 μm.

[0009] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, the surface roughness of the stainless steel substrate after surface polishing is 0.4 μm.

[0010] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, step two, after heating, also includes a step of activating the substrate surface using plasma.

[0011] In the above-mentioned method for preparing a high-wear-resistant material based on titanium fusion infiltration, the step of activating the substrate surface includes: introducing argon gas into a plasma nitriding furnace and turning on a pulsed bias power supply to apply a negative bias voltage of 500-1000V. At this time, the high-energy argon plasma can bombard the substrate surface, sputtering away trace amounts of oxide film and contaminants, resulting in an activated metal surface, thereby promoting the subsequent titanium fusion infiltration step.

[0012] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration, the pressure inside the plasma nitriding furnace after argon gas is introduced is 0.5-8.0 Pa.

[0013] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, the titanium target is a titanium plate with a purity of 99.9% or higher.

[0014] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, in step two, the temperature is first raised to 600℃ at a heating rate of 5-10℃ / min, and then raised to the target temperature at a heating rate of 80-100℃ / min.

[0015] In the above-mentioned method for preparing a high wear-resistant material based on titanium fusion infiltration technology, in step four, after reacting at a temperature of 950-1050℃ for 60-120 minutes, the temperature is lowered to 900-950℃ and reacted for 60-240 minutes.

[0016] Compared with existing technologies, the advantages of this invention are: 1. This invention uses a modification method based on Uni-Titanium infusion to modify stainless steel substrates, thereby improving the wear resistance of stainless steel materials and avoiding the problem of coating material peeling off.

[0017] 2. This invention found that the stainless steel substrate retains a certain roughness after surface polishing, which is beneficial to the performance of the final modified product. This is because an overly smooth surface may reduce the effective surface area for diffusion, thereby reducing the initial bonding force. An appropriately rough surface can increase the mechanical interlocking area, thereby promoting diffusion. However, an overly rough surface will form peak-valley differences, leading to unevenness in the diffusion process.

[0018] 3. The present invention also includes a step of activating the substrate surface using argon plasma. The high-energy argon plasma can bombard the substrate surface, sputtering away trace amounts of oxide film and contaminants to obtain an activated metal surface, thereby promoting the subsequent titanium melting penetration step.

[0019] 4. This invention employs a two-step method for titanium melting and infiltration. In the initial stage, a higher temperature is used to achieve rapid titanium infiltration, while in the later stage, the temperature is appropriately reduced to allow for diffusion reaction, while avoiding excessively large grains that could affect the overall strength of the modified material. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to specific embodiments.

[0021] Example 1 This embodiment provides a method for preparing a high wear-resistant material based on titanium fusion infiltration technology, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.2μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 15 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 5°C / min, and then heat it to 950°C at a heating rate of 80°C / min. Hold the temperature for 60 minutes. Introduce argon gas into the plasma nitriding furnace and turn on the pulse bias power supply to apply a negative bias voltage of 500V. The pressure inside the plasma nitriding furnace after introducing argon gas is 0.5Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 500V for 60 minutes. Step 4: Reduce the negative bias voltage to 200V and introduce nitrogen gas. React at 950℃ for 60 minutes, then cool to 900℃ and react for another 60 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0022] Example 2 This embodiment provides a method for preparing a high wear-resistant material based on titanium fusion infiltration technology, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.8μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 20 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600℃ at a heating rate of 10℃ / min, and then heat it to 1050℃ at a heating rate of 100℃ / min. Hold the temperature for 120 min, introduce argon gas into the plasma nitriding furnace, and turn on the pulse bias power supply to apply a negative bias voltage of 1000V. The pressure inside the plasma nitriding furnace after introducing argon gas is 8.0 Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 800V for 120 minutes. Step 4: Reduce the negative bias voltage to 400V and introduce nitrogen gas. React at 1050℃ for 120 minutes, then cool to 950℃ and react for 240 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0023] Example 3 This embodiment provides a method for preparing a high wear-resistant material based on titanium fusion infiltration technology, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.4μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 18 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 8°C / min, and then heat it to 1000°C at a heating rate of 90°C / min. Hold the temperature for 90 minutes. Introduce argon gas into the plasma nitriding furnace and turn on the pulse bias power supply to apply a negative bias voltage of 750V. The pressure inside the plasma nitriding furnace after introducing argon gas is 4.0Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 650V for 90 minutes. Step 4: Reduce the negative bias voltage to 300V and introduce nitrogen gas. React at 1000℃ for 90 minutes, then cool to 920℃ and react for 150 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0024] Comparative Example 1 This comparative example provides a method for preparing a high wear-resistant material, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.1μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 18 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 8°C / min, and then heat it to 1000°C at a heating rate of 90°C / min. Hold the temperature for 90 minutes. Introduce argon gas into the plasma nitriding furnace and turn on the pulse bias power supply to apply a negative bias voltage of 750V. The pressure inside the plasma nitriding furnace after introducing argon gas is 4.0Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 650V for 90 minutes. Step 4: Reduce the negative bias voltage to 300V and introduce nitrogen gas. React at 1000℃ for 90 minutes, then cool to 920℃ and react for 150 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0025] Comparative Example 2 This comparative example provides a method for preparing a high wear-resistant material, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 1.2μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 18min. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 8°C / min, and then heat it to 1000°C at a heating rate of 90°C / min. Hold the temperature for 90 minutes. Introduce argon gas into the plasma nitriding furnace and turn on the pulse bias power supply to apply a negative bias voltage of 750V. The pressure inside the plasma nitriding furnace after introducing argon gas is 4.0Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 650V for 90 minutes. Step 4: Reduce the negative bias voltage to 300V and introduce nitrogen gas. React at 1000℃ for 90 minutes, then cool to 920℃ and react for 150 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0026] Comparative Example 3 This comparative example provides a method for preparing a high wear-resistant material, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.4μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 18 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to a plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 8°C / min, and then heat it to 1000°C at a heating rate of 90°C / min. Hold the temperature for 90 minutes. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 650V for 90 minutes. Step 4: Reduce the negative bias voltage to 300V and introduce nitrogen gas. React at 1000℃ for 90 minutes, then cool to 920℃ and react for 150 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0027] Comparative Example 4 This comparative example provides a method for preparing a high wear-resistant material, including the following steps: Step 1: Grind the stainless steel substrate to a surface roughness of 0.4μm, then use acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 18 minutes. Then transfer it to an oven for drying to obtain a clean substrate. Step 2: Transfer the clean substrate obtained in Step 1 to the plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, and then start the heating system. First, heat the substrate to 600°C at a heating rate of 8°C / min, and then heat it to 1000°C at a heating rate of 90°C / min. Hold the temperature for 90 minutes. Introduce argon gas into the plasma nitriding furnace and turn on the pulse bias power supply to apply a negative bias voltage of 750V. The pressure inside the plasma nitriding furnace after introducing argon gas is 4.0Pa. Step 3: Turn on the arc evaporation source of the titanium target. The titanium target is a titanium plate with a purity of 99.9% or higher. Maintain a negative bias of 650V for 90 minutes. Step 4: Reduce the negative bias voltage to 300V and introduce nitrogen gas. React at 1000℃ for 240 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

[0028] Application Example 1 Using the high wear-resistant materials prepared in Example 3 and Comparative Examples 1-4 as test objects, and following the test method of GB / T 12444-2006 "Metallic Materials Wear Test Method - Test Ring-Block Sliding Wear Test", the wear quality of each high wear-resistant material after the experiment was recorded. The results are shown in the table below: Results Analysis: The test results above show that the high wear-resistant material provided by the present invention has the best wear resistance, thus achieving the expected purpose of the present invention.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for preparing a high wear-resistant material based on titanium fusion infiltration technology, characterized in that, Includes the following steps: Step 1: Clean the surface of the stainless steel substrate to obtain a clean substrate; Step 2: Transfer the clean substrate obtained in Step 1 to a plasma nitriding furnace, seal it, start the vacuum system to remove oxygen, then start the heating system, raise the temperature to 950-1050℃, and hold for 60-120 minutes. Step 3: Turn on the arc evaporation source of the titanium target and maintain a negative bias of 500-800V for 60-120 minutes; Step 4: Reduce the negative bias voltage to 200-400V and introduce nitrogen gas. React for 120-360 minutes to obtain the crude product. Step 5: Introduce argon gas and cool the furnace to below 150°C under argon atmosphere. Then transfer it outside the plasma nitriding furnace and allow it to cool naturally to room temperature to obtain a high wear-resistant material.

2. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 1, characterized in that: The specific steps for cleaning the stainless steel substrate surface in step one include: grinding the substrate surface until it is flat, then using acetone and anhydrous ethanol for ultrasonic cleaning in sequence, with each cleaning time being 15-20 minutes, and then transferring it to an oven for drying.

3. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 2, characterized in that: The surface roughness of the stainless steel substrate after surface polishing is 0.2-0.8 μm.

4. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 3, characterized in that: The surface roughness of the stainless steel substrate after surface polishing is 0.4 μm.

5. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 1, characterized in that: In step two, after heating is completed, the process also includes activating the substrate surface using plasma.

6. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 5, characterized in that: The step of activating the substrate surface includes: introducing argon gas into the plasma nitriding furnace and turning on the pulse bias power supply to apply a negative bias voltage of 500-1000V.

7. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 6, characterized in that: The pressure inside the plasma nitriding furnace after argon gas is introduced is 0.5-8.0 Pa.

8. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 1, characterized in that: The titanium target is a titanium plate with a purity of 99.9% or higher.

9. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 1, characterized in that: In step two, the temperature is first increased to 600℃ at a rate of 5-10℃ / min, and then increased to the target temperature at a rate of 80-100℃ / min.

10. The method for preparing a high wear-resistant material based on titanium fusion infiltration technology as described in claim 1, characterized in that: In step four, after reacting at a temperature of 950-1050℃ for 60-120 minutes, the temperature is lowered to 900-950℃ and the reaction continues for 60-240 minutes.

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