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GB/T 6883-2017 English PDF (GBT6883-2017)

GB/T 6883-2017 English PDF (GBT6883-2017)

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GB/T 6883-2017: Cemented carbide sintering body for wire, bar or tube drawing dies -- Dimensions

This Standard specifies the dimensions and technical requirements for cemented carbide sintering body for metal wire, bar or tube drawing dies. This Standard applies to metal wire, bar and tube drawing dies.
GB/T 6883-2017
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.160
H 72
Replacing GB/T 6883-1995
Cemented Carbide Sintering Body for Wire,
Bar or Tube Drawing Dies - Dimensions
(ISO2804: 1996, Wire, bar or tube drawing dies -
As-sintered pellets of hard metal (carbide) - Dimensions, NEQ)
ISSUED ON: SEPTEMBER 29, 2017
IMPLEMENTED ON: APRIL 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Symbols and names ... 5
4 Requirements ... 6
5 Test method ... 14
6 Test rules ... 15
7 Marking, packaging, transportation, storage and quality certificate ... 16 8 Contract (or order form) content ... 17
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 6883-1995, Wire, bar or tube drawing dies. As sintered pellets of hard-metal.
Compared with GB/T 6883-1995, the major changes of this Standard are as follows:
-- Partially adjust type-II product specifications;
-- Cancel the normal level of dimensional tolerance;
-- Respectively formulate the dimensional tolerance according to the wire mold base and the bar and tube mold base;
-- Delete Appendix A, and standardize the requirements for machining
allowances;
-- Delete Appendix B;
-- Add requirements for size falling corners;
-- Revise the surface defect requirements of the mold base;
-- Add relevant contents of surface quality to the test methods and inspection rules.
This Standard uses the redrafting method to refer to ISO 2804:1996, Wire, bar or tube drawing dies - As-sintered pellets of hard metal (carbide) - Dimensions, NEQ; and its degree of consistency with ISO 2804:1996 is non-equivalent. This Standard was proposed by the China Nonferrous Metals Industry
Association.
This Standard shall be under the jurisdiction of National Technical Committee 243 on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
The drafting organizations of this Standard: Zhuzhou Cemented Carbide Group Co., Ltd., China Nonferrous Metals Techno-Economic Research Institute,
Shenzhen Zhucheng Technology Co., Ltd.
The drafters of this Standard: Wang Huiping, Wu Jianbing, Liu Tiemei, Yang Jun, Wu Yanhua, Zhao Guoming.
The previous versions of the standards which are replaced by this Standard are: Cemented Carbide Sintering Body for Wire, Bar or
Tube Drawing Dies - Dimensions
1 Scope
This Standard specifies the dimensions and technical requirements for
cemented carbide sintering body for metal wire, bar or tube drawing dies. This Standard applies to metal wire, bar and tube drawing dies.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 5242, Inspection rules and test methods of cemented carbide products GB/T 5243, Marking, packing, transport and storage of cemented carbide
products
3 Symbols and names
Symbols and names which are referred to in this Standard are shown in Table 1.
Table 1
Symbol Name Unit
d1 Inner diameter of machining allowance
Millimeter
(mm)
d01 Inner diameter
d02 Outer diameter
d04 Entrance area width
d05 Exit area width
h02 Height
l01 Entrance area depth
l02 Deformation area depth
l03 Calibrating strap length
l04 Exit area length
R01 Entrance area chamfer radius
5.2 The physical property, mechanical property and structure of the product shall be inspected according to the method that is determined by GB/T 5242. 5.3 The size and allowable deviation of the product shall be inspected by a gage of the appropriate accuracy.
5.4 The appearance quality of the product shall be inspected visually and in combination with gauges of corresponding precision.
6 Test rules
6.1 Inspection and acceptance
6.1.1 The product shall be inspected by the supplier to ensure that the product quality complies with the requirements of this Standard and the contract (or the order form); the supplier shall fill in the quality certificate.
6.1.2 The demander shall re-inspect the received products in accordance with the provisions of this Standard and the contract (or the order form). If the result of the re-inspection is inconsistent with the provisions of this Standard and the contract (or the order form), a written form shall be submitted to the supplier within 3 months from the date of receipt of the product; the issue shall be settled by negotiation between the supplier and the buyer. If an arbitration is required, the arbitration sampling shall be carried out jointly by the supplier and the buyer. 6.2 Batch
Products shall be submitted for acceptance in batches. Each batch consists of products of the same raw material, the same type, and the same process. The quantity of each batch is determined according to the requirements of the buyer. 6.3 Inspection items and sampling
The inspection items, sampling regulations and quantities of the products shall comply with the requirements of Table 14.
Table 14
Inspection items Sampling regulations
Sampling
amount
Required
article
number
Article
number of
the test
method
Chemical
composition Mixture
1 part per
batch 4.4 5.1
Physical property,
mechanical property,
structure
Random sampling
of products (for
bending strength
Perform
according to
the
4.5 5.2
test, use the furnace
sample)
provisions of
GB/T 5242
Dimensions and
allowable deviation One by one - 4.6 5.3
Appearance quality One by one - 4.7 5.4
Note: for the chemical composition of the product, the supplier is allowed to report the test results by the mixture.
6.4 Determination of the test result
6.4.1 If the chemical composition of the product is unqualified, the batch of products is judged to be unqualified.
6.4.2 The determination of the test result of physical property, mechanical property and structure of the product shall be performed according to the provisions of GB/T 5242. When the test result is unqualified, double sampling shall be carried out to repeat the test of the unqualified items. If there is still one unqualified inspection result, the batch of products is judged unqualified. 6.4.3 If the dimension and allowable deviation of the product are unqualified, the product is judged to be unqualified.
6.4.4 If the appearance quality of the product is unqualified, the product is judged to be unqualified.
7 Marking, packaging, transportation, storage and
quality certificate
7.1 Marking, packaging, transportation and storage
Marking, packaging, transportation and storage of products shall be carried out according to provisions of GB/T 5243.
7.2 Quality certificate
Each batch of products shall be accompanied by a quality certificate, which indicates:
a) the name and address of the supplier;
b) product name:
c) product model;
d) batch number;

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