GB/T 9790-2021 Active National standards

GB/T 9790-2021 Metallic materials—Vickers and Knoop microhardness tests of metallic and other inorganic coatings

GB/T 9790-2021 Metallic materials—Vickers and Knoop microhardness tests of metallic and other inorganic coatings

Publish Date: 2021-04-30 Implement Date: 2021-11-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 9790-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: \n Test methods for the mechanical properties of metals

ICS Name: Mechanical testing of metal materials

Publish Date: 2021-04-30

Implement Date: 2021-11-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国钢标准化技术委员会(SAC/TC 183)

Pages: 20 pages

Scope

本文件规定了金属及其他无机覆盖层的维氏和努氏显微硬度试验的原理、符号和说明、设备、影响测量准确度的因素、试验程序、结果的不确定度和试验报告。
本文件适用于电沉积覆盖层、自催化覆盖层、喷涂铝的覆盖层和铝阳极氧化膜等多种覆盖层的测定。测定时试验力一般不大于9.807 N(1 kgf)。本文件8.3适用于覆盖层截面的显微硬度测定，8.4适用于覆盖层表面的显微硬度测定。
注1：GB/T 18449的第1部分～第4部分描述了金属材料努氏硬度试验。GB/T 4340的第1部分～第4部分描述了金属材料维氏硬度试验。GB/T 21838(所有部分）描述了金属材料硬度和材料参数的仪器化压痕试验。
注2：覆盖层试验力通常选用GB/T 4340.1-2009中显微维氏硬度范围内的试验力。但是，由于宜尽可能选择大的试验力，也可选用GB/T 4340.1-2009中小力值维氏硬度范围内的试验力。

Development Information

Drafting Units:

首钢集团有限公司、国家钢铁及制品质量监督检验中心、深圳万测试验设备有限公司、冶金工业信息标准研究院

Drafting Persons:

王萍、温娟、董莉、张晓丽、黄星、侯慧宁、姚成虎、贾惠平、李丹丹

Word Count: 34 Thousand words Pages: 20 pages

Replace the following standards

GB/T 9790-1988 Metallic and related coatings—Vickers and Knoop microhardness tests

Superseded by the following standards

GB/T 4340.1-2024 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 18449.1-2024 Metallic materials—Knoop hardness test—Part 1:Test method

Referenced Standards

GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 18449.1-2009 Metallic materials—Knoop hardness test—Part 1:Test method GB/T 4340.2-1999 Metallic vickers hardness test—Part 2:Verification of hardness testers GB/T 4340.2-2012 Metallic materials—Vickers hardness test—Part 2:Verification and calibration of testing machines GB/T 4340.4-2009 Metallic materials—Vickers hardness test—Part 4:Tables of hardness values GB/T 4340.4-2022 Metallic materials—Vickers hardness test—Part 4:Tables of hardness values GB/T 6462-1986 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 6462-2005 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 18449.2-2001 Metallic knoop hardness test—Part 2:Verification of hardness testers GB/T 18449.2-2012 Metallic materials—Knoop hardness test—Part 2:Verification and calibration of testing machines GB/T 18449.4-2009 Metallic materials—Knoop hardness test—Part 4:Tables of hardness values GB/T 18449.4-2022 Metallic materials—Knoop hardness test—Part 4:Tables of hardness values JJG 151-2006 Metallic Vickers Hardness Testers JJG 1047-2009 Metallic Knoop Hardness Testers GB/T 4340.2-2025 Metallic materials—Vickers hardness test—Part 2:Verification and calibration of testing machines GB/T 6462-2025 Metallic and oxide coatings—Measurement of coating thinckness—Microscopical method

Adopt standards

ISO 4516:2002

Related Standards

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GB/T 1814-1979 Inspection method for steel work fractures

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GB/T 2107-1980 Replaced

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