阅读说明：本技术 一种控制单晶叶片荧光显示的工艺方法 (Process method for controlling fluorescent display of single crystal blade ) 是由 乐献刚 张鸿 白景晨 黄秋 高力秋 于 2021-08-25 设计创作，主要内容包括：一种控制单晶叶片荧光显示的工艺方法,步骤为：腐蚀前,对已完成热处理的单晶叶片表面进行干粉吹砂处理,去除凝固过程和热处理过程中形成的表面附着物；对单晶叶片的缘板部位进行局部封蜡保护；对单晶叶片进行晶粒度腐蚀,需要对腐蚀过程的时间进行控制；去除单晶叶片缘板部位的局部封蜡；对单晶叶片进行荧光检验,荧光检验前利用磨头对单晶叶片缘板部位表面进行打磨处理,用以提高一次荧光检验通过率。本发明的控制单晶叶片荧光显示的工艺方法,成功解决了困扰单晶叶片多年的荧光显示问题,一次荧光检验的通过率可达80％以上,二次荧光检验的通过率可达99％,大幅度提高了单晶叶片的生产效率,同时降低了劳动强度。(A process method for controlling the fluorescent display of a single crystal blade comprises the following steps: before corrosion, carrying out dry powder sand blasting treatment on the surface of the single crystal blade subjected to heat treatment, and removing surface attachments formed in the solidification process and the heat treatment process; carrying out local wax sealing protection on the edge plate part of the single crystal blade; carrying out grain size corrosion on the single crystal blade, wherein the time of the corrosion process needs to be controlled; removing local sealing wax at the edge plate part of the single crystal blade; and (3) carrying out fluorescence inspection on the single crystal blade, and polishing the surface of the edge plate part of the single crystal blade by using a grinding head before the fluorescence inspection so as to improve the primary fluorescence inspection pass rate. The technological method for controlling the fluorescence display of the single crystal blade successfully solves the problem of fluorescence display puzzling the single crystal blade for many years, the passing rate of primary fluorescence inspection can reach more than 80%, and the passing rate of secondary fluorescence inspection can reach 99%, so that the production efficiency of the single crystal blade is greatly improved, and the labor intensity is reduced.)

1. A process method for controlling the fluorescent display of a single crystal blade is characterized by comprising the following steps:

the method comprises the following steps: before corrosion, carrying out dry powder sand blasting treatment on the surface of the single crystal blade subjected to heat treatment, and removing surface attachments formed in the solidification process and the heat treatment process;

step two: carrying out local wax sealing protection on the edge plate part of the single crystal blade;

step three: carrying out grain size corrosion on the single crystal blade, wherein the time of the corrosion process needs to be controlled;

step four: removing local sealing wax at the edge plate part of the single crystal blade;

step five: and (3) carrying out fluorescence inspection on the single crystal blade, and polishing the surface of the edge plate part of the single crystal blade by using a grinding head before the fluorescence inspection so as to improve the primary fluorescence inspection pass rate.

2. The process method for controlling the fluorescent display of the single crystal blade according to claim 1, wherein the process method comprises the following steps: in the second step, the local wax sealing protection implementation process is as follows: heating and melting the dyed wax material to 130 ℃ for heat preservation, brushing the upper end surface of the edge plate part of the single crystal blade by using wax oil dipped by a brush, and controlling the thickness of the wax seal to be 0.15-3 mm.

3. The process method for controlling the fluorescent display of the single crystal blade according to claim 1, wherein the process method comprises the following steps: in the third step, the grain size corrosion process of the single crystal blade is as follows: when FeCl is used₃:HCl:H₂When the grain size of the single crystal blade is corroded by 150g, 200ml and 300ml of corrosive liquid, the corrosion time is controlled to be 2-5 min; in order to accurately control the corrosion time, 2 pieces of comparison blades with mixed crystal defects are placed before corrosion, and the surfaces of the parts with the mixed crystal defects on the comparison blades need to be polished and subjected to sand blowing treatment; and (4) taking out the comparison blade every 1min for observation after the corrosion starts for 2min, and ending the corrosion until the dendrites and the mixed crystals of the comparison blade are clearly displayed.

4. The process method for controlling the fluorescent display of the single crystal blade according to claim 1, wherein the process method comprises the following steps: in the third step, the grain size corrosion process of the single crystal blade is as follows: when using H₂O₂When the crystal grain size of the single crystal blade is corroded by the HCl (0.5-1) and 10 of corrosive liquid, controlling the corrosion time to be 30-90 s; in order to accurately control the corrosion time, 2 pieces of comparison blades with mixed crystal defects are placed before corrosion, and the surfaces of the parts with the mixed crystal defects on the comparison blades need to be polished and subjected to sand blowing treatment; after 30s from the beginning of the erosion, the comparative leaves were taken out every 15s and observed until the erosion was observedIf the corrosion is more clearly shown than the dendrite and the mixed crystal of the blade, the corrosion is over.

5. The process method for controlling the fluorescent display of the single crystal blade according to claim 1, wherein the process method comprises the following steps: and in the fourth step, a high-pressure dewaxing kettle is adopted to remove the local wax sealing of the single crystal blade edge plate part, the upper end face of the single crystal blade edge plate part is needed during dewaxing, and after dewaxing is finished, the residual wax oil on the upper end face and the tenon surface of the single crystal blade edge plate part is immediately wiped off by using clean cotton cloth.

Technical Field

The invention belongs to the technical field of single crystal blade preparation, and particularly relates to a process method for controlling fluorescence display of a single crystal blade.

Background

The single crystal blade solidification process is sequential solidification, and surface fluorescence caused by dendrite outcrop is shown to be a common problem in single crystal blade fluorescence inspection. In the process of solidifying the single crystal blade, after the primary dendrite is solidified, because the secondary dendrite between dendrite trunks at the outcrop part can not be supplied by molten metal during solidification, a microscopic 'pit' can be generated on the surface of the outcrop part. This "crater" is deepened by subsequent erosion due to the difference in texture between the primary and secondary dendrites. The fluorescence sensitivity at the present stage can find secondary micro-porosity, so that the outcrop crystals can cause surface fluorescence display, and particularly, the fluorescence display caused by outcrop of dendrites at the solidification tail end which is vertical to the solidification direction of the single crystal, such as the parts of a leaf crown, a flange plate and the like, is more serious.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a process method for controlling the fluorescence display of the single crystal blade, which successfully solves the fluorescence display problem puzzling the single crystal blade for many years, the passing rate of primary fluorescence inspection can reach more than 80%, and the passing rate of secondary fluorescence inspection can reach 99%, thereby greatly improving the production efficiency of the single crystal blade and simultaneously reducing the labor intensity.

In order to achieve the purpose, the invention adopts the following technical scheme: a process method for controlling the fluorescent display of a single crystal blade comprises the following steps:

the method comprises the following steps: before corrosion, carrying out dry powder sand blasting treatment on the surface of the single crystal blade subjected to heat treatment, and removing surface attachments formed in the solidification process and the heat treatment process;

step two: carrying out local wax sealing protection on the edge plate part of the single crystal blade;

step three: carrying out grain size corrosion on the single crystal blade, wherein the time of the corrosion process needs to be controlled;

step four: removing local sealing wax at the edge plate part of the single crystal blade;

step five: and (3) carrying out fluorescence inspection on the single crystal blade, and polishing the surface of the edge plate part of the single crystal blade by using a grinding head before the fluorescence inspection so as to improve the primary fluorescence inspection pass rate.

In the second step, the local wax sealing protection implementation process is as follows: heating and melting the dyed wax material to 130 ℃ for heat preservation, brushing the upper end surface of the edge plate part of the single crystal blade by using wax oil dipped by a brush, and controlling the thickness of the wax seal to be 0.15-3 mm.

In the third step, the grain size corrosion process of the single crystal blade is as follows: when FeCl is used₃:HCl:H₂When the grain size of the single crystal blade is corroded by 150g, 200ml and 300ml of corrosive liquid, the corrosion time is controlled to be 2-5 min; in order to accurately control the corrosion time, 2 pieces of comparison blades with mixed crystal defects are placed before corrosion, and the surfaces of the parts with the mixed crystal defects on the comparison blades need to be polished and subjected to sand blowing treatment; and (4) taking out the comparison blade every 1min for observation after the corrosion starts for 2min, and ending the corrosion until the dendrites and the mixed crystals of the comparison blade are clearly displayed.

In the third step, the grain size corrosion process of the single crystal blade is as follows: when using H₂O₂When the crystal grain size of the single crystal blade is corroded by the HCl (0.5-1) and 10 of corrosive liquid, controlling the corrosion time to be 30-90 s; in order to accurately control the corrosion time, 2 pieces of comparison blades with mixed crystal defects are placed before corrosion, and the surfaces of the parts with the mixed crystal defects on the comparison blades need to be polished and subjected to sand blowing treatment; and after the corrosion starts for 30s, taking out the comparative blade every 15s for observation until the dendrite and the mixed crystal of the comparative blade are clearly displayed, and finishing the corrosion.

And in the fourth step, a high-pressure dewaxing kettle is adopted to remove the local wax sealing of the single crystal blade edge plate part, the upper end face of the single crystal blade edge plate part is needed during dewaxing, and after dewaxing is finished, the residual wax oil on the upper end face and the tenon surface of the single crystal blade edge plate part is immediately wiped off by using clean cotton cloth.

The invention has the beneficial effects that:

the technological method for controlling the fluorescence display of the single crystal blade successfully solves the problem of fluorescence display puzzling the single crystal blade for many years, the passing rate of primary fluorescence inspection can reach more than 80%, and the passing rate of secondary fluorescence inspection can reach 99%, so that the production efficiency of the single crystal blade is greatly improved, and the labor intensity is reduced.

Drawings

FIG. 1 is a schematic view of a single crystal blade;

in the figure, 1-single crystal blade, 2-dense point fluorescent display part at the edge plate part and corresponding wax sealing protection area.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

A process method for controlling the fluorescent display of a single crystal blade comprises the following steps:

the method comprises the following steps: before corrosion, carrying out dry powder sand blasting treatment on the surface of the single crystal blade subjected to heat treatment, and removing surface attachments formed in the solidification process and the heat treatment process;

step two: the method comprises the following steps of carrying out local wax sealing protection on the edge plate part of the single crystal blade shown in the figure 1, wherein the implementation process of the local wax sealing protection comprises the following steps: heating and melting a dyeing wax material (red wax material is recommended, and the dyeing wax material can be prepared by mixing red dye and white paraffin) to 130 ℃ for heat preservation, coating the upper end surface (the solidification tail end vertical to the solidification direction) of the edge plate part of the single crystal blade by using wax oil which is dipped and melted by a brush, and controlling the thickness of sealing wax to be 0.15-3 mm;

step three: the single crystal blade is subjected to grain size corrosion, the time of the corrosion process needs to be controlled, and the grain size corrosion process of the single crystal blade is as follows:

when FeCl is used₃:HCl:H₂When the grain size of the single crystal blade is corroded by 150g, 200ml and 300ml of corrosive liquid, the corrosion time is controlled to be 2-5 min; in order to accurately control the etching time, 2 comparative blades with mixed crystal defects are placed before etching, and the comparative blades are provided with the mixed crystal defectsPolishing and sand blowing treatment are required to be carried out on the surface of the sunken part; after the corrosion begins for 2min, taking out the comparison blade every 1min for observation until the dendritic crystals and the mixed crystals of the comparison blade are clearly displayed, and corroding the junction;

when using H₂O₂When the crystal grain size of the single crystal blade is corroded by the HCl (0.5-1) and 10 of corrosive liquid, controlling the corrosion time to be 30-90 s; in order to accurately control the corrosion time, 2 pieces of comparison blades with mixed crystal defects are placed before corrosion, and the surfaces of the parts with the mixed crystal defects on the comparison blades need to be polished and subjected to sand blowing treatment; after the corrosion starts for 30s, taking out the comparison blade every 15s for observation until the dendritic crystals and the mixed crystals of the comparison blade are clearly displayed, and finishing the corrosion;

step four: removing local wax sealing at the edge plate part of the single crystal blade, removing the local wax sealing at the edge plate part of the single crystal blade by using a pressure dewaxing kettle, wherein the upper end surface (namely, a tenon is downward) of the edge plate part of the single crystal blade is required during dewaxing, and immediately wiping off residual wax oil on the upper end surface and the surface of the tenon at the edge plate part of the single crystal blade by using clean cotton cloth after dewaxing is finished;

step five: and (3) carrying out fluorescence inspection on the single crystal blade, and polishing the surface of the edge plate part of the single crystal blade by using a grinding head before the fluorescence inspection so as to improve the primary fluorescence inspection pass rate.

The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.