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JJG 147-2017: Metallic Brinell Hardness Reference Blocks
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
JJG 147-2017	English	369	Add to Cart	3 days [Need to translate]	Metallic Brinell Hardness Reference Blocks
JJG 147-2005	English	599	Add to Cart	3 days [Need to translate]	Verification Regulation of Metallic Brinell Hardness Reference Blocks
JJG 147-1991	English	399	Add to Cart	3 days [Need to translate]	Verification Regulation of Standard Brinell Hardness Test Block
JJG 147-1983	English	RFQ	ASK	3 days [Need to translate]	(Chinese Industry Standard)

JJG 147-2017: Metallic Brinell Hardness Reference Blocks

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(Standard Metallic Brinell Hardness Block Verification Regulation) People's Republic of China National Metrological Verification Procedures Standard metal Brinell hardness block 2017-02-28 Posted 2017-08-28 Implementation General Administration of Quality Supervision, Inspection and Quarantine released Standard metal Brinell hardness block Verification procedures Replacing JJG 147-2005 The focal point. The national strength of hardness measurement Technical Committee The main drafting unit. China Institute of Metrology Zhejiang Institute of Metrology Laizhou Huayin Test Instrument Co., Ltd. Shanghai Institute of Quality Supervision, Inspection and Technology Participate in the drafting unit. China Institute of Test Technology Beijing Institute of Metrology and Measurement Quanzhou Fortress East China Instrument hardness block plant Shenyang Star Test Instrument Co., Ltd. This procedure entrusts the national hardness measurement technical committee responsible for the interpretation The main drafters of this procedure. Liu Jiping (China Institute of Metrology) Cao Hao (Zhejiang Institute of Metrology) Wang Jingtao (Laizhou Huayin Test Instrument Co., Ltd.) Shen Qi (Shanghai Institute of Quality Supervision, Inspection and Technology) Participate in the drafters. Xu Zhimin (China Test Technology Research Institute) Wang Ningxi (Beijing Institute of Metrology and Measurement) Chen Jun salary (Quanzhou Fortress East China Sea instrument hardness block plant) Zhang Fenglin (Shenyang Tianxing Experimental Instrument Co., Ltd.)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Overview (1) 4 measurement performance requirements (2) 4.1 Standard block uniformity Jrel (d) (2) 4.2 standard block hardness range (2) 4.3 Standard indentation (2) 4.4 standard block stability (3) 5 General technical requirements (3) 5.1 standard block geometry and surface roughness (3) 5.2 other requirements of the standard block (4) 6 measuring instruments control (4) 6.1 test conditions (4) 6.2 test items and test methods (4) 6.3 test results of the treatment (6) 6.4 test cycle (6) Appendix A standard metal Brinell hardness block calibration uncertainty evaluation (7) Appendix B Standard Metal Brinell Block Test Original Recording Format (9) Appendix C standard metal Brinell hardness test certificate and test results within the page format (10)

Introduction

This regulation is revised in accordance with JJF1002-2010 "Rules for the Compilation of National Metrological Verification Procedures". This procedure and JJG 147-2005 compared to the main changes are as follows. --- Modify the original code in the standard hardness of the definition of uniformity, and ISO 6506-3.2014 in the degree of uniformity Consistent definition --- Modify the standard hardness of the hardness range, in line with the requirements of ISO 6506-3.2014; --- Increased the definition of standard indentation and requirements; --- Given the number of standard indentation effective data requirements; --- The appearance of the hardness test block, the following temperatures below -70 ℃ cryogenic treatment and after at least six months since However, the effectiveness of such requirements on the hardness block factory inspection. The previous version of the rules of the release. --- JJG 147-2005; --- JJG 147-1991; --- JJG 147-1984. Standard metal Brinell hardness test procedures

1 Scope

This procedure applies to the first test of standard metal Brinell hardness block, follow-up test and in-service inspection.

2 References

The procedures cited in the following documents. JJG 2005 Brinell hardness measuring instrument verification system Terms and definitions for force value and hardness measurement ISO 6506-1.2014 Brinell hardness test for metallic materials - Part 1. Test methods (Metalicmate- rials-Brinelhardnesstest-Part 1.Testmethod) ISO 6506-3.2014 Brinell hardness testing of metallic materials - Part 3. Calibration of standard blocks (Metalic materials-Brinelhardnesstest-Part 3.Calibrationofreferenceblocks) For dated references, only the dated version applies to this edition; any undated reference The latest version (including all amendments) applies to this procedure.

3 Overview

Standard metal Brinell hardness block (hereinafter referred to as the standard block) is the indication of metal Brinell hardness test standards appliance. Brinell hardness test principle is to a certain diameter of the cemented carbide ball with a predetermined test force into the sample surface, the Specified holding time after removing the test force, measuring the indentation diameter of the sample surface. According to equation (1) calculate the Brinell hardness value. HBW = k · 2F πD (D-D2-d2) (1) In the formula. HBW --- Brinell hardness value; k --- unit conversion factor, k = 0.102; F --- test force, N; D --- ball diameter, mm; d --- indentation diameter, mm. Brinell hardness test head with a ball of hard alloy, Brinell hardness symbol is HBW. Hammering Brinell hardness test can be used steel ball pressure head, hardness symbol "HBS". Standard block hardness value representation. Symbol HBW before the hardness value, the symbol HBW followed by a sequence of digital table Ball diameter, test force and test force retention time (s), the test force retention time of 10s ~ 15s can not be marked. Example .200HBW10/3000/30 said Brinell hardness value of.200, carbide ball indenter diameter of 10mm, Test force of 3000 × 9.807N, test force to maintain time of 30s. ...