润滑科技信息平台

专利摘要

提供了一种具有耐磨保护涂层的钛合金刀尖及其制备方法。该方法包括:(1)采用高速氧燃料(HVOF)喷涂方式将MCrAlY合金粉末喷涂在钛合金叶尖表面,喷涂距离为300-400mm,得到表面具有MCrAlY层的钛合金叶尖。表面; 其中M是Ni和NiCo之一; (2)预镀Ni,电流密度4-10A/dm 2 ; (3)将预镀钛合金刀尖置于瓦特溶液中,在步骤(2)得到的预镀钛合金刀尖表面覆盖磨粒,然后进行复合电镀,电流密度为 0.5-2安/分米 2 。本发明在钛合金刀尖上制备了高附着强度的耐磨保护涂层,该耐磨保护涂层具有良好的耐磨性。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US18/512227
申请日期:
2023-11-17
专利申请人:
分类号:
F01D5/28 ; B05D1/12 ; C23C28/02 ; C25D7/00 ; F01D11/12
发明/设计人:
YU, YUEGUANG ， HUANG, LINGFENG ， LIU, JIANMING ， WANG, SHUAI ， LU, XIAOLIANG ， CAI, YINGHUI ， GUO, RUI ， LIU, TONG ， GUO, DAN ， WU, CHAO
权利要求: 1. A preparation method of a titanium alloy blade tip with a wear-resistant protective coating, comprising:step (1) spraying M-chromium-aluminum-yttrium (MCrAlY) alloy powder on a surface of a titanium alloy blade tip by a high velocity oxygen fuel (HVOF) spraying process at a spraying distance in a range of 300-400 millimeters (mm) to obtain the titanium alloy blade tip with a MCrAlY layer on the surface; wherein M is one of nickel (Ni) and nickel-cobalt (NiCo);step (2) pre-plating Ni at a current density in a range of 6-10 amperes per square decimeter (A/dm2) on the titanium alloy blade tip with the MCrAlY layer to obtain a pre-plated titanium alloy blade tip;step (3) placing the pre-plated titanium alloy blade tip in a Watt solution, covering a surface of the pre-plated titanium alloy blade tip obtained in the step (2) with abrasive particles, and then performing composite electroplating at a current density in a range of 0.5-2 A/dm2, so as to obtain the titanium alloy blade tip with the wear-resistant protective coating.2. The preparation method according to claim 1, wherein in the step (1), a thickness of the MCrAlY layer is in a range of 10-100 micrometers (μm), and a particle size of the MCrAlY alloy powder is in a range of 270-500 μm.3. The preparation method according to claim 1, wherein in the step (1), conditions of the high velocity oxygen fuel spraying process comprise: 40-60 grams per minute (g/min) of powder feeding rate, 16-30 liter per minute (L/min) of kerosene flow rate, and 600-1000 L/min of oxygen flow rate;wherein in the step (2), pre-plating time is in a range of 2-6 min, and a pre-plating solution used in the pre-plating of the Ni comprises 80-160 grams per liter (g/L) of nickel chloride, 20-40 g/L of boric acid and 0-100 milliliters per liter (mL/L) of hydrochloric acid, where a content of hydrogen chloride (HCl) in the hydrochloric acid is 30-40 weight percentage (wt %).4. The preparation method according to claim 1, wherein in the step (1), conditions of the high velocity oxygen fuel spraying process comprise: 40-60 g/min of powder feeding rate, 20-30 L/min of kerosene flow rate, and 800-1000 L/min of oxygen flow rate;wherein in the step (2), a pre-plating solution used in the pre-plating of the Ni comprises 120-160 g/L of nickel chloride and 36-40 g/L of boric acid.5. The preparation method according to claim 1, wherein in the step (3), time of the composite electroplating is in a range of 0.5-3 hours (h); the Watt solution comprises 280-350 g/L of nickel sulfate, 40-150 g/L of nickel chloride and 36-40 g/L of boric acid;wherein a thickness of a composite coating formed in the step (3) is in a range of 5-30 μm;wherein in the step (3), the abrasive particles are selected from at least one of cubic boron nitride, aluminum oxide, and silicon carbide; and particle sizes of the abrasive particles are in a range of 50-300 μm.6. The preparation method according to claim 1, further comprising:step (4) removing unfixed abrasive particles after the composite electroplating in step (3) is completed; then filling a thickened coating of single metal or multi-metal between the fixed abrasive particles by electroplating; wherein a thickness of the thickened coating is in a range of 20-200 μm.7. The preparation method according to claim 6, wherein an electroplating solution used for the composite electroplating comprises 280-350 g/L of nickel sulfate, 40-150 g/L of nickel chloride and 36-40 g/L of boric acid; or the electroplating solution comprises 300-400 g/L of the nickel sulfate, 50-150 g/L of cobalt sulfate, and 36-40 g/L of the boric acid;wherein electroplating conditions comprise: the current density is in a range of 1.5-2 A/dm2, and electroplating time is in a range of 1-4 h.8. A titanium alloy blade tip with a wear-resistant protective coating, prepared by the preparation method according to claim 1, wherein the wear-resistant protective coating comprises the MCrAlY layer and a metal-abrasive composite coating sequentially bonded on the surface of the titanium alloy blade tip; and the metal-abrasive composite coating comprises a nickel coating and the abrasive particles at least partially dispersed in the nickel coating.9. The titanium alloy blade tip according to claim 8, wherein a thickness of the MCrAlY layer is in a range of 10-100 μm, and a thickness of the metal-abrasive composite coating is in a range of 5-300 μm;wherein a bonding strength between the wear-resistant protective coating and the titanium alloy blade tip through an adhesive-tensile test is greater than 65 megapascals (MPa); in a scraping and grinding test with a zirconia spray-coated outer ring segment with a hardness value HR15Y of 80-85, under conditions of ambient temperature of 600° C., linear velocity of 350 meters per second (m/s), relative radial velocity of 50 micrometer per second (μm/s) and radial grinding depth of 500 μm, a thickness reduction of the wear-resistant protective coating on the titanium alloy blade tip is less than 0.01 mm.