GB/T 40067-2021 PDF EnglishUS$170.00 · In stock · Download in 9 seconds
GB/T 40067-2021: Microstructure and defect determination of tungsten carbide powder Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 40067-2021: Microstructure and defect determination of tungsten carbide powder---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/GBT40067-2021GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.160 CCS H 24 Microstructure and Defect Determination of Tungsten Carbide Powder ISSUED ON: MAY 21, 2021 IMPLEMENTED ON: DECEMBER 1, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative References ... 4 3 Terms and Definitions ... 4 4 Principle ... 4 5 Instruments and Equipment ... 4 6 Sample ... 5 7 Test Procedures ... 5 8 Processing of Test Data ... 6 9 Test Report ... 6 Appendix A (informative) Pictures of Microstructure and Typical Defects of Tungsten Carbide Powder ... 8 Microstructure and Defect Determination of Tungsten Carbide Powder1 ScopeThis Standard specifies the scanning electron microscope detection method for microstructure observation and defect analysis of tungsten carbide powder. This Standard is applicable to the scanning electron microscope detection of the microstructure and defect of tungsten carbide power with a particle size of 0.1 μm ~ 0.5 μm.2 Normative ReferencesThis document does not have normative references.3 Terms and DefinitionsThere are no terms and definitions that need to be defined in this document.4 PrincipleUse a scanning electron microscope to observe the morphology of the prepared tungsten carbide powder. From the morphology, distinguish the hard agglomeration of tungsten carbide powder, the thick tungsten carbide powder, the aggregation of grain inhibitors and the impurities. Through an X-ray energy dispersive spectrometer, determine the grain inhibitors and the impurities.5 Instruments and Equipment5.1 Scanning electron microscope. 5.2 X-ray energy dispersive spectrometer. 5.3 Ultrasonic disperser. 5.4 Sample stage: the sample stage shall be conductive; the end surface shall be smooth, flat and clean. and record the number and size of the thick tungsten carbide powder. See Figure A.3. NOTE: the thick tungsten carbide powder is a single tungsten carbide particle with a size greater than 5 times the average particle size of the powder. The average particle size of the powder can be Fischer particle size, laser particle size or the average particle size of the powder converted from specific surface area. 7.2.6 If a structure with significantly different color and shape from that of the matrix tungsten carbide powder is found, then, use the X-ray energy dispersive spectrometer to perform elemental analysis on the observed structure, so as to determine whether it is an aggregation of grain inhibitor or impurity. See Figure A.4, Figure A.5, Figure A.6 and Figure A.7. 7.2.7 In order to ensure that the observed tungsten carbide powder is representative, it is recommended to browse at least 20 fields of view.8 Processing of Test Data8.1 Microstructure Provide a representative picture of the microstructure, see Figure A.1. 8.2 Defects 8.2.1 Provide the number and size of the hard agglomeration of tungsten carbide powder. 8.2.2 Provide the number and size of the thick tungsten carbide powder. 8.2.3 Provide the category of the agglomeration of grain inhibitor or the impurity.9 Test ReportThe test report shall include the following contents: a) Serial No. of this document; b) Necessary instruction for sample identification; c) Number of fields of view for detection; d) Picture of the microstructure of tungsten carbide powder; e) Type, size and number of defects; f) Other operations not specified or optional in this document; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 40067-2021 be delivered?Answer: The full copy PDF of English version of GB/T 40067-2021 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 40067-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 40067-2021_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 40067-2021 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 40067-2021?A step-by-step guide to download PDF of GB/T 40067-2021_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 40067-2021". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
