Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for steel ball sample and testing method for Rockwell hardness of steel ball

A technology of Rockwell hardness and test method, which is applied in the Rockwell hardness test of steel balls and the field of sample preparation of steel ball samples, which can solve problems such as unevenness, failure to meet the requirements of the hardness test, and grease.

Inactive Publication Date: 2017-06-30
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The determination of the quality of the steel ball usually requires the determination of its hardness. When testing the hardness of the steel ball, due to the limitation of the spherical shape of the steel ball, it is generally necessary to use the wire cutting method to prepare the steel ball sample, but the wire cutting process After the steel ball sample, the surface usually has uneven processing traces, and there is grease on the surface of the sample, which cannot meet the requirements of the hardness test.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for steel ball sample and testing method for Rockwell hardness of steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention discloses a sample preparation method of a steel ball sample. The steel ball is cut by wire cutting, and the processed steel ball includes a first grinding surface and a second grinding surface opposite to each other. The first grinding surface was ground several times by using an abrasive belt grinding machine to form the test surface of the steel ball. The grinding method was followed by rough grinding, fine grinding, and fine grinding in sequence. The grain size of the abrasive belt for coarse grinding is 50 mesh, until the metallic luster is completely exposed; the grain size of the abrasive belt for fine grinding is 220 mesh, until the first grinding surface is flat and smooth; the grain size of the abrasive belt for fine grinding is 800 mesh, Until the first grinding surface is flat and smooth without grinding marks. After the grinding is completed, the first grinding surface is the surface where the center of the steel ball is located. Grind the se...

Embodiment 2

[0027] The invention discloses a sample preparation method of a steel ball sample. The steel ball after being cut and processed by wire cutting includes a first grinding surface and a second grinding surface opposite to each other. The first grinding surface was ground several times by using an abrasive belt grinding machine to form the test surface of the steel ball. The grinding method was followed by rough grinding, fine grinding, and fine grinding in sequence. The grain size of the abrasive belt for rough grinding is 40 mesh, until the metallic luster is completely exposed; the grain size of the abrasive belt for fine grinding is 230 mesh, until the first grinding surface is flat and smooth; the grain size of the abrasive belt for fine grinding is 780 mesh, Until the first grinding surface is flat and smooth without grinding marks. After the grinding is completed, the first grinding surface is the surface where the center of the steel ball is located. Grind the second gri...

Embodiment 3

[0030]The invention discloses a sample preparation method of a steel ball sample. The steel ball is cut by wire cutting, and the processed steel ball includes a first grinding surface and a second grinding surface opposite to each other. The first grinding surface was ground several times by using an abrasive belt grinding machine to form the test surface of the steel ball. The grinding method was followed by rough grinding, fine grinding, and fine grinding in sequence. The grain size of the abrasive belt for coarse grinding is 60 mesh, until the metallic luster is completely exposed; the grain size of the abrasive belt for fine grinding is 200 mesh, until the first grinding surface is flat and smooth; the grain size of the abrasive belt for fine grinding is 820 mesh, Until the first grinding surface is flat and smooth without grinding marks. After the grinding is completed, the first grinding surface is the surface where the center of the steel ball is located. Grind the sec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method for a steel ball sample and a testing method for the Rockwell hardness of a steel ball, belonging to the field of hardness testing. The preparation method for the steel ball sample comprises a step of polishing a steel ball with a first grinding surface and a second grinding surface arranged face to face. The step of steel ball polishing comprises the following sub-steps: subjecting the first grinding surface to multiple grinding so as to form a test surface, during multiple grinding of the first grinding surface, abrasive particles for latter grinding of the first grinding surface are smaller than abrasive particles for former grinding of the first grinding surface; and grinding the second grinding surface so as to form a supporting surface. With the preparation method, the ground steel ball has a flat and smooth surface and meets requirements of testing of Rockwell hardness; and the test surface has small roughness, and accurate Rockwell hardness testing on the steel ball sample can be carried out. The testing method for the Rockwell hardness of the steel ball comprises a step of subjecting the steel ball sample prepared by using the preparation method to Rockwell hardness testing. The testing results of the testing method are accurate.

Description

technical field [0001] The invention relates to the field of hardness testing, and in particular to a sample preparation method of a steel ball sample and a method for testing the Rockwell hardness of the steel ball. Background technique [0002] Steel ball is an important basic component, which is widely used in electric power, building materials, mining, metallurgy and other fields, especially in precision industry. The steel ball is the most important component of the bearing, and it is also the most widely used rolling element in the bearing industry. The quality of the steel ball directly affects the quality of the bearing. Under some special conditions, steel balls of special materials are often required to complete the functions required in different environments. Therefore, the quality of the steel ball is particularly important. The determination of the quality of the steel ball usually requires the determination of its hardness. When testing the hardness of the s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/44G01N1/28
CPCG01N3/44G01N1/286G01N2203/0076
Inventor 吴伟
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com