Method for detecting brittleness of nickel-plated diamond coating

Abstract

The invention discloses a method for detecting the brittleness of a nickel-plated diamond coating, which comprises the following steps of: impacting a nickel-plated diamond through an impact toughness tester according to set impact frequency and impact times, and then calculating the ratio of oversize products to undersize products through screening so as to measure the brittleness degree of the nickel-plated diamond coating. The method for evaluating the brittleness degree of the plating layer is provided for the application field of the nickel-plated diamond, and an important theoretical basis is provided for high-efficiency application of the nickel-plated diamond.

Description

Technical Field

[0001] The invention belongs to the technical field of plated diamond performance detection, and in particular relates to a method for detecting the brittleness of a nickel-plated diamond coating. Background Art

[0002] Diamond is the material with the highest known hardness and has the advantages of high thermal conductivity, electrical insulation, and corrosion resistance. It is widely used in traditional grinding and polishing processing fields as well as high-tech fields such as aerospace, national defense and military industry. In the processing field, diamond does not wet most metals, resins, ceramics and other binders, and has poor bonding strength. The holding force is not strong, causing diamond particles to fall off, seriously affecting the service life and efficiency of the tool. Research and practice have proved that plating metal on the surface of diamond can effectively improve the bonding strength between diamond and binder, solving the problem of weak holding force.

[0003] At present, surface metallization of diamond can be achieved through vacuum micro-evaporation plating, chemical plating and electroplating, including titanium plating, copper plating, cobalt plating, nickel plating, etc. Nickel-plated diamond is mainly used in resin-bonded abrasives. The plating of metal nickel and nickel-plated diamond effectively improves the holding force of diamond in resin bond, and improves the service life of abrasives and the quality of the workpiece being ground. However, the toughness of the coating affects the speed of diamond exposure. Therefore, it is necessary to evaluate the brittleness of nickel-plated diamond coating. Summary of the invention

[0004] The purpose of the present invention is to provide a method for detecting the brittleness of a nickel-plated diamond coating. Aiming at the problem of slow cutting edge of the nickel-plated diamond during use, the invention simulates the fast cutting edge of the nickel-plated diamond and provides a method for evaluating the brittleness of the nickel-plated diamond coating.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a method for detecting the brittleness of nickel-plated diamond coating, which is specifically implemented according to the following steps: Step 1, weighing nickel-plated diamond and placing it into an impact tank; Step 2, using an impact toughness tester to impact the impact tank with a set impact frequency and impact times; Step 3, after the impact is completed, pour out the nickel-plated diamond in the impact tank, sieve the nickel-plated diamond, calculate the proportion of the sieve, and use the proportion of the sieve to evaluate the brittleness of the nickel-plated diamond coating.

[0006] As a preferred technical solution of the present invention, in step 1, the nickel-plated diamond is chemically nickel-plated diamond.

[0007] As a preferred technical solution of the present invention, in step 1, the nickel-plated diamond is electroplated nickel diamond.

[0008] As a preferred technical solution of the present invention, in step 1, nickel-plated diamond is added in multiple times.

[0009] As a preferred technical solution of the present invention, in step 1, 0.3 g to 0.4 g of nickel-plated diamond is added each time.

[0010] As a preferred technical solution of the present invention, in step 2, the impact frequency of the impact toughness tester is set to 2400r / min.

[0011] As a preferred technical solution of the present invention, in step 2, the corresponding number of impacts is selected according to the nickel-plated diamonds of different particle sizes, and the number of impacts is 200 times, 400 times, 600 times, 800 times, 900 times, 1200 times, 2400 times, and 3000 times respectively.

[0012] As a preferred technical solution of the present invention, the corresponding impact times are 200 times / min, 400 times / min, 600 times / min, 800 times / min, 900 times / min, 1200 times / min, 2400 times / min, and 3000 times / min, respectively, for 1 min.

[0013] The beneficial effects of the present invention are as follows: the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of the nickel-plated diamond tool and the quality of the processed parts. DETAILED DESCRIPTION

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in , wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by reference are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0015] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0016] A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weighing nickel-plated diamond and loading it into an impact tank; the nickel-plated diamond is chemically nickel-plated diamond or electroplated nickel diamond; the nickel-plated diamond is added in multiple times, 0.3 g - 0.4 g each time; Step 2, using an impact toughness tester to impact the impact tank with a set impact frequency and impact number; the impact frequency of the impact toughness tester is 2400 r / min, and the corresponding impact number is selected according to the nickel-plated diamond of different particle sizes, as shown in Table 1: Table 1

[0017] Step 3, after the impact is completed, pour out the nickel-plated diamond in the impact tank, sieve the nickel-plated diamond, calculate the proportion of the sieve, and use the proportion of the sieve to evaluate the brittleness of the nickel-plated diamond coating.

[0018] Compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the cutting edge of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0019] Example 1 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3489 g of nickel-plated diamond with a particle size of 60 / 70 and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the number of impacts to 800 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, the impacted brittle nickel-plated diamond is sieved using a 181 μm sieve, and then the weight of the sieve is weighed to be 0.1490 g; The weight of the undersize material is 0.1999 g, and the calculated undersize material ratio is 57.3%.

[0020] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0021] Example 2 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.4000 g of 80 / 100 nickel-plated diamond and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 900 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 127 μm sieve, and then weighing the weight of the sieve to be 0.1667 g; The weight of the undersize material is 0.2333 g, and the calculated undersize material percentage is 58.3%.

[0022] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0023] Example 3 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3242 g of 325 / 400 nickel-plated diamond produced by our company, and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 3000 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 37 μm sieve, and then weighing the weight of the sieve to be 0.1367 g; The weight of the undersize material is 0.1875 g, and the calculated undersize material ratio is 57.8%.

[0024] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0025] Example 4 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3589 g of 140 / 170 nickel-plated diamond produced by our company and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 1200 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 75 μm sieve, and then weighing the weight of the sieve to be 0.1553 g; The weight of the undersize material is 0.2036 g, and the calculated undersize material ratio is 55.7%.

[0026] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0027] Example 5 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3209 g of 230 / 270 nickel-plated diamond produced by our company and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 3000 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 49 μm sieve, and then weighing the weight of the sieve to be 0.1416 g; The weight of the undersize material is 0.1793 g, and the calculated undersize material ratio is 55.8%.

[0028] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0029] Example 6 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3008 g of 25 / 30 nickel-plated diamond produced by our company and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 400 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 500 μm sieve, and then weighing the weight of the sieve to be 0.1276 g; The weight of the undersize material is 0.1732 g, and the calculated undersize material ratio is 57.6%.

[0030] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0031] Example 7 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3139 g of 40 / 45 nickel-plated diamond produced by our company and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the impact number to 600 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 302 μm sieve, and then weighing the weight of the sieve to be 0.1356 g; The weight of the undersize material is 0.1783 g, and the calculated undersize material ratio is 56.8%.

[0032] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0033] Example 8 A method for detecting the brittleness of a nickel-plated diamond coating of the present invention is specifically implemented according to the following steps: Step 1, weigh 0.3553 g of 170 / 200 nickel-plated diamond produced by our company and put it into an impact tank; Step 2, setting the frequency of the impact toughness tester to 2400 r / min and the number of impacts to 2400 r / min, and impacting the brittle nickel diamond for 1 min; Step 3, sieving the impacted brittle nickel-plated diamond using a 65 μm sieve, and then weighing the weight of the sieve to be 0.1566 g; The weight of the undersize material is 0.1987 g, and the calculated undersize material ratio is 55.9%.

[0034] Therefore, compared with the prior art, the method for detecting the brittleness of the nickel-plated diamond coating of the present invention simulates the blade-out condition of the nickel-plated diamond during the use of the tool, provides a method for detecting the brittleness of the coating for the application field of nickel-plated diamond, and provides an important basis for improving the service life of nickel-plated diamond tools and the quality of processed parts.

[0035] The above description shows and describes several preferred embodiments of the invention, but as mentioned above, it should be understood that the invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and modifications made by those skilled in the art should be within the scope of protection of the claims attached to the invention without departing from the spirit and scope of the invention.

Claims

1. A method for detecting the brittleness of nickel-plated diamond coatings, characterized in that: Follow the steps below to implement it: Step 1, weighing nickel-plated diamond and placing it into an impact tank; Step 2, using an impact toughness tester to impact the impact tank at a set impact frequency and impact times; Step 3, after the impact is completed, pour out the nickel-plated diamond in the impact tank, sieve the nickel-plated diamond, calculate the proportion of the sieve, and use the proportion of the sieve to evaluate the brittleness of the nickel-plated diamond coating.

2. The method for detecting brittleness of nickel-plated diamond coating according to claim 1, characterized in that: In the step 1, the nickel-plated diamond is chemically nickel-plated diamond.

3. The method for detecting brittleness of nickel-plated diamond coating according to claim 1, characterized in that: In the step 1, the nickel-plated diamond is electroplated nickel diamond.

4. The method for detecting brittleness of nickel-plated diamond coating according to claim 3, characterized in that: In step 1, nickel-plated diamond is added in multiple times.

5. The method for detecting brittleness of nickel-plated diamond coating according to claim 4, characterized in that: In step 1, 0.3 g to 0.4 g of nickel-plated diamond is added each time.

6. The method for detecting brittleness of nickel-plated diamond coating according to claim 5, characterized in that: In step 2, the impact frequency of the impact toughness tester is set to 2400 r / min.

7. The method for detecting brittleness of nickel-plated diamond coating according to claim 6, characterized in that: In step 2, the corresponding number of impacts is selected according to the nickel-plated diamonds of different particle sizes, and the number of impacts is 200 times, 400 times, 600 times, 800 times, 900 times, 1200 times, 2400 times, and 3000 times respectively.

8. The method for detecting the brittleness of the nickel-plated diamond coating according to claim 7, characterized in that: The corresponding impact times are 200 times / min, 400 times / min, 600 times / min, 800 times / min, 900 times / min, 1200 times / min, 2400 times / min, and 3000 times / min, for 1 min respectively.

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