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GB/T 24485-2009Niobium carbide powder (English PDF)

碳化铌粉

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 30, 2009

Implementation date

June 1, 2010

Scope

GB/T 24485-2009 is the English-translated version of 碳化铌粉.

GB/T 24485-2009 is the Chinese standard "Niobium carbide powder". Its scope clause reads: This standard specifies requirements for niobium carbide powder, test methods, inspection rules and signs, packaging, transportation, storage and purchase order (or contract) content.

This standard applies to niobium oxide (or niobium powder) obtained by carbonization of niobium carbide powder. For the production of carbide products and other additives used. Its clauses include requirements.

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Document preview — GB/T 24485-2009

National Standard of the People's Republic of China

ICS: 77.160
Classification: H 71

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Requirements
3.1 Categories
3.2 Chemical composition

1 Scope

This standard specifies requirements for niobium carbide powder, test methods, inspection rules and signs, packaging, transportation, storage and purchase order (or contract) content.

This standard applies to niobium oxide (or niobium powder) obtained by carbonization of niobium carbide powder. For the production of carbide products and other additives used.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 3249 Determination of metals and their compounds Fisher particle size powder

GB/T 5314 sampling method powder metallurgy

GB/T 15076 (all parts), chemical analysis of tantalum and niobium

GB/T 20508-2006 tantalum carbide powder

3 Requirements

3.1 Categories

3.1.1

chemical composition is divided into three grades. FNbC-1, FNbC-2, FNbC-3.

3.1.2 Products by size into three sizes

10,15,30.

3.2 Chemical composition

3.2.1

The chemical composition of various grades of products should meet the requirements in Table 1.

Table 1 mass fraction /%

Item FNbC-1 FNbC-2 FNbC-3

NbC >=99.5 >=99.0 >=99.0

Total carbon 11.0 ± 0.4 11.0 ± 0.4 11.0 ± 0.4

Impurity content, no greater than

0.15 0.15 0.15 free carbon

Ta 0.5 1.0 1.0

Al 0.005 0.005 0.01

Ca 0.005 0.01 0.015

Co 0.05 0.1 0.15

Cr 0.05 0.1 0.15

Fe 0.05 0.1 0.15

K 0.005 0.008 0.01

Mn 0.005 0.01 0.02

Mo 0.05 0.1 0.15

Na 0.005 0.008 0.01

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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