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Composite coating for titanium alloy casting graphite casting mold as well as preparation method and application of composite coating
The invention provides a composite coating for a titanium alloy casting graphite casting mold and a preparation method and application thereof.The composite coating is composed of a metal bonding layer and a ceramic layer, the ceramic layer is divided into an upper ceramic layer and a lower ceramic layer, the lower ceramic layer is made of Al2O3, the upper ceramic layer is made of ZrO2, Y2O3, CaO, MgO and CeO2, and the composite coating is prepared from, by mass, 28%-32% of Y2O3, 4%-8% of CaO, 2%-4% of MgO, 1%-2% of CeO2 and the balance Al2O3. ZrO2: the balance; the graphite casting mold and the ceramic lower layer are arranged on the two sides of the metal bonding layer respectively. The composite coating and a graphite casting mold base body have better combinability, the coatings are good in adaptability, low in porosity, free of interlayer cracks and more excellent in heat insulation effect, a titanium alloy casting with more excellent surface quality can be obtained through the graphite casting mold coated with the composite coating, the surface roughness Ra of the obtained titanium alloy casting is smaller than or equal to 3.2 micrometers, the thickness of a pollution layer is smaller than or equal to 10 micrometers, and the hardness of the titanium alloy casting is larger than or equal to 100. No surface crack exists.
本发明提供了一种钛合金铸造石墨铸型用复合涂层及其制备方法和应用，所述复合涂层由金属粘结层和陶瓷层组成，所述陶瓷层分为陶瓷上层和陶瓷下层，陶瓷下层由Al2O3制成，陶瓷上层由ZrO2、Y2O3、CaO、MgO和CeO2制成，按质量百分比记，其组成为：Y2O3：28％～32％，CaO：4％～8％，MgO：2％～4％，CeO2：1％～2％，ZrO2：余量；所述金属粘结层两侧分别为石墨铸型和陶瓷下层。该复合涂层与石墨铸型基体具有更好的结合性，各涂层之间适配性好，孔隙率低，无层间裂纹，绝热效果更优异，采用涂覆有复合涂层的石墨铸型可获得表面质量更优异的钛合金铸件，所得钛合金铸件表面粗糙度Ra≤3.2μm，污染层厚度≤10μm，无表面裂纹。
Composite coating for titanium alloy casting graphite casting mold as well as preparation method and application of composite coating
The invention provides a composite coating for a titanium alloy casting graphite casting mold and a preparation method and application thereof.The composite coating is composed of a metal bonding layer and a ceramic layer, the ceramic layer is divided into an upper ceramic layer and a lower ceramic layer, the lower ceramic layer is made of Al2O3, the upper ceramic layer is made of ZrO2, Y2O3, CaO, MgO and CeO2, and the composite coating is prepared from, by mass, 28%-32% of Y2O3, 4%-8% of CaO, 2%-4% of MgO, 1%-2% of CeO2 and the balance Al2O3. ZrO2: the balance; the graphite casting mold and the ceramic lower layer are arranged on the two sides of the metal bonding layer respectively. The composite coating and a graphite casting mold base body have better combinability, the coatings are good in adaptability, low in porosity, free of interlayer cracks and more excellent in heat insulation effect, a titanium alloy casting with more excellent surface quality can be obtained through the graphite casting mold coated with the composite coating, the surface roughness Ra of the obtained titanium alloy casting is smaller than or equal to 3.2 micrometers, the thickness of a pollution layer is smaller than or equal to 10 micrometers, and the hardness of the titanium alloy casting is larger than or equal to 100. No surface crack exists.
本发明提供了一种钛合金铸造石墨铸型用复合涂层及其制备方法和应用，所述复合涂层由金属粘结层和陶瓷层组成，所述陶瓷层分为陶瓷上层和陶瓷下层，陶瓷下层由Al2O3制成，陶瓷上层由ZrO2、Y2O3、CaO、MgO和CeO2制成，按质量百分比记，其组成为：Y2O3：28％～32％，CaO：4％～8％，MgO：2％～4％，CeO2：1％～2％，ZrO2：余量；所述金属粘结层两侧分别为石墨铸型和陶瓷下层。该复合涂层与石墨铸型基体具有更好的结合性，各涂层之间适配性好，孔隙率低，无层间裂纹，绝热效果更优异，采用涂覆有复合涂层的石墨铸型可获得表面质量更优异的钛合金铸件，所得钛合金铸件表面粗糙度Ra≤3.2μm，污染层厚度≤10μm，无表面裂纹。
Composite coating for titanium alloy casting graphite casting mold as well as preparation method and application of composite coating
一种钛合金铸造石墨铸型用复合涂层及其制备方法和应用
XIE HUASHENG (author) / ZHAO JUN (author) / LIU SHIBING (author) / SHI KUN (author) / LIU HONGYU (author) / NI JIA (author) / LIU TIANYU (author) / LI CHONGYANG (author) / WANG YANPENG (author)
2023-05-09
Patent
Electronic Resource
Chinese
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