QC/T 1222.2-2025 English PDF

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QC/T 1222.2-2025: Automobile engines - Inspection method for surface treatment of piston rings - Part 2: PVD coating
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Basic data

Standard ID: QC/T 1222.2-2025 (QC/T1222.2-2025)
Description (Translated English): Automobile engines - Inspection method for surface treatment of piston rings - Part 2: PVD coating
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard: T12
Classification of International Standard: 43.060
Word Count Estimation: 10,136
Date of Issue: 2025-05-09
Date of Implementation: 2025-11-01
Issuing agency(ies): Ministry of Industry and Information Technology of the People's Republic of China

QC/T 1222.2-2025: Automobile engines - Inspection method for surface treatment of piston rings - Part 2: PVD coating

---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/QCT1222.2-2025
ICS 43.060CCS T 12 Automobile Industry Standards of the People's Republic of China Released on May 9, 2025 2025-11-01Implementation Ministry of Industry and Information Technology of the People's Republic of China issued Inspection method for surface treatment layer of automobile engine piston ring Part 2.PVD coating Automobile engines-Inspection method for surface treatment of piston rings- Part 2.PVD coating

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Type and name of each part 2 5.Inspection Method 2 5.1 Coating thickness 2 5.2 Coating hardness 2 5.3 Coating Porosity 3 5.4 Coating bonding strength 3 Figure 1 Schematic diagram of PVD coating 1 Figure 2 Schematic diagram of mounting specimen preparation Figure 3 Schematic diagram of hardness sample structure 3 Table 1 Determination of bonding strength after distortion 3 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is the second part of QC/T 1222 "Test method for surface treatment layer of automobile engine piston ring". The following parts are published. -- Part 1.Chromium-based ceramic composite coatings; --Part 2.PVD coating. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114). This document was drafted by. Anqing Diberg Piston Ring Co., Ltd., Huaminnan Piston Group Co., Ltd., Binzhou Bohai Piston Co., Ltd. Co., Ltd., Yizheng ASIMCO Shuanghuan Piston Ring Co., Ltd., Nanjing Feiyan Piston Ring Co., Ltd., and FAW Jiefang Dalian Diesel Engine Co., Ltd. The main drafters of this document are. Wang Xing, Xu Jiansun, Jiang Dianchang, Liu Fan, Zhang Yi, Guo Xiying, and Cheng Weisheng.

introduction

QC/T 1222 "Test Method for Surface Treatment Layer of Automobile Engine Piston Rings" aims to standardize the different surface coatings of automobile engine piston rings. Terms and definitions, types and composition, and inspection methods. QC/T 1222 is intended to consist of four parts. -- Part 1.Chromium-based ceramic composite coatings. The purpose is to establish the terminology and Definition, type and composition, and inspection method. -- Part 2.PVD coatings. The purpose is to establish the terms and definitions, types and compositions applicable to PVD coatings for engine piston rings. Composition and inspection methods. -- Part 3.Chromium-based diamond composite coatings. The purpose is to establish the technical specifications for chromium-based diamond composite coatings for engine piston rings. Terms and definitions, types and composition, and inspection methods. -- Part 4.DLC coating. The purpose is to establish the terms and definitions, types and compositions of DLC coatings applicable to engine piston rings. Composition and inspection methods. Inspection method for surface treatment layer of automobile engine piston ring Part 2.PVD coating

1 Scope

This document specifies the terms and definitions, types and names of various parts, and inspection methods for PVD coatings on automobile engine piston rings. This document is applicable to the inspection of PVD coatings on piston rings of automobile engines with cylinder diameters less than or equal to 160 mm. The inspection reference of PVD coating of cylinder piston ring is adopted.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document. document. GB/T 1149.1 Internal combustion engine piston rings Part 1.General rules GB/T 1149.2 Internal combustion engine piston rings Part 2.Terminology GB/T 4340.1 Metallic materials Vickers hardness test Part 1.Test method GB/T 6462 Measurement of thickness of metal and oxide coatings - Microscope method

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 PVD coating physical vapor deposition An anti-wear coating layer deposited on the outer surface of the piston ring through certain processing methods. Note 1.PVD coating materials include CrN, TiN, etc. The structure is shown in Figure 1. Note 2.PVD coating processing methods include vacuum evaporation, sputtering, ion plating, etc. 17% Figure 1 Schematic diagram of PVD coating 3.2 PVD coating thicknessPVD coating thickness The distance from the outer surface of the PVD coating to the surface of the piston ring base material or the surface of the technological transition layer. Note. PVD coating thickness does not include the thickness of the process transition layer, as shown in Figure 1. ......

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