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GB/T 6885-2020: Hard metals - Sampling and testing method of mixed powders Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 6885: Historical versions
GB/T 6885-2020: Hard metals - Sampling and testing method of mixed powders---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6885-2020NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.160 H 70 Replacing GB/T 6885-1986 Hardmetals – Sampling and Testing Method of Mixed Powders (ISO 4884:1978, Hardmetals – Sampling and Testing of Powders Using Sintered Test Pieces, NEQ) ISSUED ON: MARCH 06, 2020 IMPLEMENTED ON: FEBRUARY 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative References ... 4 3 Terms and Definitions ... 5 4 Sampling ... 5 5 Preparation of the Test Piece ... 5 6 Test Methods ... 5ForewordThis Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB/T 6885-1986 Hardmetals - Sampling and Testing of Mixed Powder. Compared with GB/T 6885-1986, this Standard made the major technical changes as follows besides the editorial modifications: --- Modify the description of batching in sampling (see 4.2 of this Edition; 3.2 of 1986 Edition); --- Modify the process requirements for preparation of test pieces (see Clause 5 of this Edition; Clause 4 of 1986 Edition); --- Add the test methods for the Vickers hardness of hardmetals (see Clause 6 of this Edition). This Standard was formulated by using the re-drafting method and referring to ISO 4884:1978 Hardmetals – Sampling and Testing of Powders Using Sintered Test Pieces; the degree of consistency between this Standard and ISO 4884:1978 is inequivalent. This Standard was proposed by China Non-Ferrous Metals Industry Association. This Standard shall be under the jurisdiction of National Technical Committee for Standardization of Non-ferrous Metals (SAC/TC 243). Drafting organizations of this Standard: Zhuzhou Cemented Carbide Group Co., Ltd.; Zigong Cemented Carbide Co., Ltd.; and Shenzhen Zhucheng Science and Technology Co., Ltd. Chief drafting staffs of this Standard: Mao Shanwen, Yao Xiongzhi, Liang Hong, Liu Tiemei, Zhang Yue, and Li Siyuan. The historical edition replaced by this Standard is as follows: --- GB/T 6885-1986. Hardmetals – Sampling and Testing Method of Mixed Powders1 ScopeThis Standard specifies mixed powder sampling, test piece preparation and test methods for determining the properties of hardmetals by sintering test pieces. This Standard is applicable to the sampling and test methods of mixed powder of hardmetals.2 Normative ReferencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document. GB/T 3488.1 Hardmetals - Metallographic Determination of Microstructure - Part 1: Photomicrographs and Description GB/T 3489 Hardmetals - Metallographic Determination of Porosity and Uncombined Carbon GB/T 3848 Hardmetals - Determination of (the Magnetization) Coercivity GB/T 3849.1 Hardmetals - Rockwell Hardness Test (Scale A) - Part 1: Test Method GB/T 3850 Impermeable Sintered Metal Materials and Hardmetals - Determination of Density GB/T 3851 Hardmetals - Determination of Transverse Rupture Strength GB/T 5314 Powders for Powder Metallurgical Purposes - Sampling GB/T 7997 Hardmetals - Vickers Hardness Test ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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