CN105401111B - It is a kind of to improve the method for strong cubic texture nickel tungsten composite baseband surface quality - Google Patents

Abstract

Improve the method for strong cubic texture nickel tungsten composite baseband surface quality the invention discloses a kind of.It is cold rolling for 80% ~ 90% cogging that the present invention carries out total deformation to the Ni 5at.%W alloy composite plates base after hot rolling；Cold rolling, the surface defect in elimination hot rolling blank is carried out to Ni 5at.%W alloy composite basebands using the working roll of sandblasting；Then the working roll for changing light is again 80 μm ~ 95 μm to Ni 5at.%W alloy composite basebands progress finish rolling to thickness；The strong cubic texture Ni 5at.%W alloy composite basebands of great surface quality are finally obtained using recrystallization annealing.Ni 5at.%W alloy composite baseband better performances produced by the present invention, available for preparing high performance coating superconducting band.

Description

A method for improving the surface quality of nickel-tungsten alloy composite substrate with strong cubic texture

technical field

The invention belongs to the technical field of textured metal basebands for industrialized high-temperature coating conductors, and in particular relates to a method for improving the surface quality of nickel-tungsten alloy composite basebands with strong cubic texture.

Background technique

The second-generation yttrium-based high-temperature coated superconducting tape is expected to achieve large-scale applications in the fields of superconducting transformers, superconducting motors, and superconducting current limiters because of its superior performance compared to the first-generation bismuth-based superconducting materials. . The second-generation high-temperature superconducting materials represented by YBCO are usually obtained by thin-film epitaxial growth technology to obtain high-performance high-temperature coated superconducting strips due to the effect of weak connections between grains and the brittleness caused by the ceramic structure of YBCO. The calendering-assisted biaxial texturing technology, or RABiTS technology, is an important research direction for yttrium-based high-temperature coated conductors. RABiTS technology grows a thin film layer on a base template material with biaxial orientation, so that the YBCO film can epitaxially align the template, thereby A high critical current density is obtained. For the textured base tape for YBCO coated conductors prepared by the RABiTS route, not only a high degree of texture is required, but also a good surface quality is one of the keys to obtain high-performance high-temperature superconducting tapes. The patent with the publication number CN102140670A discloses a continuous electrolytic polishing device and method for alloy base strips for coated conductors. A variety of strong acids are used as the components of the electrolytic polishing liquid for the base strip with a length of 100 meters. The manufacturing cost is relatively high in industrial production and It will cause serious pollution to the environment and is not an ideal way to improve the surface quality of the baseband. Therefore, improving the surface quality of textured metal substrates with cheap, environmentally friendly and efficient technology can lay a good practical foundation for the industrial production of high-performance textured metal substrates for second-generation coated superconductors.

Contents of the invention

The technical problem solved by the invention is to provide a low-cost and environment-friendly method for improving the surface quality of nickel-tungsten alloy composite substrate with strong cubic texture.

In order to solve the above technical problems, the present invention adopts the following technical scheme, a method for improving the surface quality of a nickel-tungsten alloy composite substrate with a strong cubic texture, characterized in that the specific steps are:

Step S100: performing cold rolling on the hot-rolled Ni-5at.%W alloy composite slab

Step S101: The Ni-5at.%W alloy composite slab with the surface scale removed after hot rolling is subjected to blanking and cold rolling with a four-high rolling mill. The deformation of each pass is 15%~20%, and the total deformation is 80%~ 90%, the rolling speed is controlled at 30~60m/min;

Step S200: Finish rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using a 20-high rolling mill

Step S201: Sandblasting the roll body of the 20-high rolling mill with brown corundum sand, and the particle size of the sand material is 70-140 mesh;

Step S202: cold rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using the 20-high rolling mill treated in step S201, the deformation amount of each pass is 15%~20%, rolling 4~7 passes ;

Step S203: Replace the work rolls of the twenty-high rolling mill with work rolls with root mean square roughness R _ms <5nm, and cold-roll the Ni-5at.%W alloy composite base strip prepared in step S202 to a thickness of 80~ 95μm, of which the deformation amount of each pass is 15%~20%;

Step S300: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203

Step S301: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203, the heating temperature is 1000°C, the strip speed is 3m/min, and the protective atmosphere is a mixed gas of nitrogen and hydrogen, wherein the hydrogen The volume fraction is 10%.

Since the hot-rolled alloy is likely to cause a large number of defects such as scratches, strangulation, and foreign matter intrusion during the crimping process, it is difficult to remove these surface defects in the subsequent blanking and finishing rolling processes, resulting in poor surface quality of the finished base tape , which seriously affects the subsequent preparation of high-performance transition layers and superconducting layers. The present invention blasts the work rolls at the initial stage of finish rolling, increases the friction between the rolls and the surface of the base strip and controls the deformation of the sandblasting work rolls and the bright work rolls during the rolling process, so that the surface defects of the base strip can be eliminated during rolling. Elimination during the process avoids the subsequent use of electrolytic polishing technology to improve the surface quality of the baseband, saves manufacturing costs, and avoids environmental pollution problems caused by electrolytic polishing. Since the preparation of nitrogen is simple and the price is relatively cheap, the mixed gas of nitrogen and hydrogen is used, the volume ratio of hydrogen is controlled, and the reducing property of hydrogen is used to keep the baseband bright during the recrystallization heat treatment process, while saving costs.

Description of drawings

Fig. 1 is the (001) surface pole figure of the Ni-5at.%W alloy composite substrate surface that the embodiment of the present invention 1 makes;

Figure 2 is the (001) surface pole figure of the surface of the Ni-5at.%W alloy composite substrate prepared in Example 2 of the present invention.

detailed description

The above-mentioned contents of the present invention are described in further detail below through the embodiments, but this should not be interpreted as the scope of the above-mentioned themes of the present invention being limited to the following embodiments, and all technologies realized based on the above-mentioned contents of the present invention all belong to the scope of the present invention.

Example 1

Step S100: performing cold rolling on the hot-rolled Ni-5at.%W alloy composite slab

Step S101: The Ni-5at.%W alloy composite slab with the surface scale removed after hot rolling is cold-rolled with a four-high rolling mill, with a deformation of 15% per pass, a total deformation of 90%, and a rolling speed of Control at 30m/min;

Step S200: Finish rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using a 20-high rolling mill

Step S201: Sandblasting the roll body of the 20-high rolling mill with brown corundum sand, and sandblasting the working rolls with brown corundum sand, and the particle size of the sand material is 140 mesh;

Step S202: cold rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using the 20-high rolling mill processed in step S201, the deformation amount of each pass is 15%, and rolling 7 passes;

Step S203: Replace the work rolls of the 20-high rolling mill with work rolls with root mean square roughness R _ms < 5nm, and cold-roll the Ni-5at.%W alloy composite base strip prepared in step S202 to a thickness of 80 μm , where the pass deformation is 15%;

Step S300: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203

Step S301: The Ni-5at.%W alloy cold-rolled base strip obtained in step S203 is subjected to continuous recrystallization heat treatment, the heating temperature is 1000°C, the strip speed is 3m/min, and the protective atmosphere is a mixed gas of nitrogen and hydrogen, wherein the hydrogen The volume fraction is 10%, and the Ni-5at.%W alloy composite substrate with bright surface and strong cubic texture is finally obtained. The (001) plane pole figure of the strong cubic texture Ni-5at.%W alloy composite substrate surface is shown in Fig. The square root roughness R _ms is 7nm.

Example 2

Step S100: performing cold rolling on the hot-rolled Ni-5at.%W alloy composite slab

Step S101: The Ni-5at.%W alloy composite slab with the surface scale removed after hot rolling is cold-rolled with a four-high rolling mill. The deformation of each pass is 20%, the total deformation is 80%, and the rolling speed is Control at 60m/min;

Step S200: Finish rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using a 20-high rolling mill

Step S201: Sandblasting the roll body of the 20-high rolling mill with brown corundum sand, and sandblasting the working rolls with brown corundum sand, and the particle size of the sand material is 70 mesh;

Step S202: cold rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using the 20-high rolling mill processed in step S201, the deformation amount of each pass is 20%, and rolling 4 passes;

Step S203: Replace the work rolls of the 20-high rolling mill with work rolls with root mean square roughness Rms<5nm, and cold-roll the Ni-5at.%W alloy composite base strip prepared in step S202 to a thickness of 95 μm. Among them, the pass deformation is 20%;

Step S300: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203

Step S301: The Ni-5at.%W alloy cold-rolled base strip obtained in step S203 is subjected to continuous recrystallization heat treatment, the heating temperature is 1000°C, the strip speed is 3m/min, and the protective atmosphere is a mixed gas of nitrogen and hydrogen, wherein the hydrogen The volume fraction is 10%, and a strong cubic texture Ni-5at.%W alloy composite substrate with a bright surface is finally obtained. The (001) surface pole diagram of the surface of the strong cubic texture Ni-5at.%W alloy composite substrate is shown in Figure 2 As shown, it can be seen from the figure that the root mean square roughness R _ms of the Ni-5at.%W alloy composite substrate surface is 7nm.

The above embodiments have described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What are described in the above embodiments and description are only to illustrate the principles of the present invention. Without departing from the scope of the principle of the present invention, there will be various changes and improvements in the present invention, and these changes and improvements all fall within the protection scope of the present invention.

Claims (1)

1. A method for improving the surface quality of a nickel-tungsten alloy composite substrate with a strong cubic texture, characterized in that the specific steps are: Step S100: performing cold rolling on the hot-rolled Ni-5at.%W alloy composite slab Step S101: The Ni-5at.%W alloy composite slab with the surface scale removed after hot rolling is subjected to blanking and cold rolling with a four-high rolling mill. The deformation of each pass is 15%~20%, and the total deformation is 80%~ 90%, the rolling speed is controlled at 30~60m/min; Step S200: Finish rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using a 20-high rolling mill Step S201: Sandblasting the roll body of the 20-high rolling mill with brown corundum sand, and the particle size of the sand material is 70-140 mesh; Step S202: cold rolling the Ni-5at.%W alloy composite base strip prepared in step S101 by using the 20-high rolling mill treated in step S201, the deformation amount of each pass is 15%~20%, rolling 4~7 passes ; Step S203: Replace the work rolls of the twenty-high rolling mill with work rolls with root mean square roughness R _ms <5nm, and cold-roll the Ni-5at.%W alloy composite base strip prepared in step S202 to a thickness of 80~ 95μm, of which the deformation amount of each pass is 15%~20%; Step S300: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203 Step S301: Perform recrystallization heat treatment on the Ni-5at.%W alloy cold-rolled base strip obtained in step S203, the heating temperature is 1000°C, the strip speed is 3m/min, and the protective atmosphere is a mixed gas of nitrogen and hydrogen, wherein the hydrogen The volume fraction is 10%.