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QC/T 1098-2018Technical specifications for powder metallurgy hubs of automotive clutches (English PDF)

汽车离合器用粉末冶金盘毂技术条件

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

July 4, 2018

Implementation date

January 1, 2019

Scope

QC/T 1098-2018 is the English-translated version of 汽车离合器用粉末冶金盘毂技术条件.

QC/T 1098-2018 covers the powder metallurgy hub used in the clutch driven plate assembly of passenger cars, specifying its technical requirements and the detection methods that verify them.

Chemical composition is checked for carbon, copper, nickel, molybdenum and iron by the GB/T 223 series methods, with density determined to GB/T 5163 and hardness to GB/T 9097.1.

Tensile strength is measured on a specimen prepared to GB/T 7963 and tested to GB/T 7964, and impact toughness on a specimen prepared to GB/T 5318 and tested to GB/T 9096.

Tooth and spline precision is checked to GB/T 3478.5, the spline accuracy being the 6th grade of GB/T 3478.1-2008 unless supplier and purchaser agree another. The hub shall also pass a static torsion test and either a 1 x 10^6 enhanced torsional endurance test or a 5 x 10^6 torsional endurance test without failing. Issued on 4 July 2018, it has applied since 1 January 2019.

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Document preview — QC/T 1098-2018

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Foreword5
1 Scope6
2 Normative references6
3 Technical requirements7
4 Detection method8

1 Scope

1.1 This standard specifies the technical requirements and test methods for the powder metallurgy hub, which is used in the clutch driven plate assembly of passenger cars.

1.2 This standard applies to the powder metallurgy hub (hereinafter referred to as hub) for clutch driven disk assemblies of passenger cars.

2 Normative references

The 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) is applicable to this standard.

GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodometric method for the determination of copper content

GB/T 223.23 Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method

GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method

GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-volumetric method after combustion in the pipe furnace

GB/T 223.73 Iron steel and alloy - Determination of iron contents - Titanium trichloride-potassium dichromate titration method

GB/T 3478.1 Straight cylindrical involute splines - Metric module side fit - Part 1: Generalities

GB/T 3478.5 Straight cylindrical involute splines - Metric module side fit - Part 5: Inspection

GB/T 5163 Sintered metal materials, excluding hardmetals - Permeable sintered metal materials - Determination of density, oil content, and open porosity

3 Technical requirements

3.4 The hub shall be subjected to the static torsion test, 1 x 10^6 enhanced torsional endurance test or 5 x 10^6 torsional endurance test, in accordance with the test conditions specified in 4.4.1.2 and 4.4.2.1. It is required that the parts must not fail, after the test.

4 Detection method

4.1 Chemical composition and physical properties

4.1.1 The carbon content shall be measured according to the method specified in GB/T 223.69.

4.1.2 The copper content shall be determined according to the method specified in GB/T 223.18.

4.1.3 The nickel content shall be determined according to the method specified in GB/T 223.23.

4.1.4 The molybdenum content shall be determined, according to the method specified in GB/T 223.26.

4.1.5 Iron content shall be determined according to the method specified in GB/T 223.73.

4.1.6 Density shall be determined, according to the method specified in GB/T 5163.

4.1.7 Hardness shall be determined, according to the method specified in GB/T 9097.1.

4.2 Mechanical properties

4.2.1 For the tensile strength, prepare the tensile specimen, according to the method specified in GB/T 7963. Determine it according to the method specified in GB/T 7964.

4.2.2 For the impact toughness, prepare the impact specimen according to the method specified in GB/T 5318. Determine it according to the method specified in GB/T 9096.

4.3 Tooth and spline accuracy

The precision of tooth and splines shall be determined, according to the method specified in GB/T 3478.5.

4.4 Hub torsion test

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

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