QC/T 544-2025Camshaft of automobile engine (English PDF)

1 Scope

This document specifies the classification and structural types, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of camshafts of automotive engine.

This document is applicable to integral camshafts and mechanically interference-fit assembled camshafts (hereinafter referred to as the “camshafts”) for automotive engines.

2 Normative References

The contents of the following documents constitute indispensable clauses of this document through normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite- sodium nitrite titrimetric method for the determination of manganese content

GB/T 223.60 Iron, steel and alloy - Determination of silicon content - Gravimetric method

GB/T 223.61 Methods for chemical analysis of iron, steel and alloy - The ammonium phosphomolybdate volumetric method for the determination of phosphorus content

GB/T 223.83 Steel and iron - Determination of high sulfur content - Infrared absorption method after combustion in an induction furnace

GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace

GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace

GB/T 224 Determination of the depth of decarburization of steels

GB/T 226 Test method for macrostructure and defect of steel by etching

GB/T 228.1 Metallic materials - Tensile testing - Part 1.Method of test at room temperature

GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test method

GB/T 231.1 Metallic materials - Brinell hardness test - Part 1.Test method

GB/T 699 Quality carbon structure steels

GB/T 10128 Metallic materials - Torsion test at ambient temperature

GB/T 10561 Determination of content of nonmetallic inclusions in steel - Micrographic method using standard diagrams

GB/T 12443 Metallic materials - Torque-controlled fatigue testing

GB/T 13320 Metellographic grading atlas and assessing method for steel die forgings

GB/T 18254 High-carbon chromium bearing steel

GB/T 19055 Reliability test methods for motor vehicle engines

GB/T 19076 Specifications for sintered metal materials

GB/T 31315 Cold drawn or cold rolled precision weld steel tubes for mechanical structures

GB/T 34891 Rolling bearings - Parts made from high-carbon chromium bearing steels -

Specifications for heat treatment

JB/T 6729 Internal combustion engines - Magnetic particle inspection for crankshafts and camshafts

JB/T 9204 Metallographic examination of induction hardened steel parts

JB/T 9205 Metallographic examination of pearlitic graphite cast iron parts induction hardened

ISO 683-17 Heat-treatable steels, alloy steels and free-cutting steels - Part 17.Ball and roller bearing steels

3 Terms and Definitions

The following terms and definitions are applicable to this document.

4 Classification and Structural Types