GB/T 34564.1-2017 in English

VALID

Cold-word mould steel - Part 1: High toughness and wear-resistance steels

Issued on:2017-10-14
Implemented on:2018-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $140.00
$136.00

Standard No:	GB/T 34564.1-2017
Document status:	VALID
Title in English:	Cold-word mould steel - Part 1: High toughness and wear-resistance steels
Title in Chinese:	冷作模具钢第1部分：高韧性高耐磨性钢
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-10-14
Implemented on:	2018-07-01
ICS Classification:	77.140.35-Tool steels
Chinese Classification:	H40-Steel and iron products in general
Professional Classification:	GB-National Standard
Related Keywords:	high wear resistance steel background high toughness cold working die steel part high wear resistance die steel
Related Topics:	zero toughness High toughness high toughness Die Steel Cryogenic Box Mold Steel Cryogenic Box Technology Mold Steel Cryogenic Box Technology Die Steel Cryogenic Box Die Steel Cryogenic Technology Mold Steel Cryogenic Box Technology GB/T 34564.1 GB/T 34564.1-2017 cold work die steel Wear-resistant high manganese steel Wear-resistant steel wear resistance

《GB/T 34564.1-2017冷作模具钢第1部分：高韧性高耐磨性钢》由TC183（全国钢标准化技术委员会）归口，TC183SC16（全国钢标准化技术委员会特殊钢分会）执行，主管部门为中国钢铁工业协会。

Introduction

National Standard of the People's Republic of China GB/T 34564.1—2017

Cold Working Die Steel Part 1: High Toughness and High Wear Resistance Steel

Background of Standard Formulation and Analysis of Technical Evolution

GB/T 34564.1—2017 specifies the ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of high toughness and high wear resistance cold working die steel. This part is applicable to high toughness and high wear resistance cold working die steel (hereinafter referred to as "steel") delivered by hot rolling, forging, cold drawing, silver bright bar steel and machining. This standard is under the jurisdiction of the National Technical Committee for Steel Standardization (SAC/TC183) and aims to meet the needs of modern mold manufacturing industry for high performance cold working die materials.

With the advancement of mold manufacturing technology, mold materials need to take into account high strength, high wear resistance and good processing performance. The formulation of GB/T 34564.1-2017 fully takes these technical requirements into consideration, especially by optimizing the chemical composition design and heat treatment process, which significantly improves the comprehensive performance of steel.

Comparison table of standard frameworks

Technical requirements dimension	Provisions of this section	Comparison standards	Advantage analysis
Chemical composition control	Precisely defines the content range of key elements such as Cr, Mo, Si (as shown in Table 1)	Based on the GB/T 223 series of standards, further refines the requirements for high-toughness wear-resistant steel	Higher composition stability to ensure material uniformity
Delivery status	Delivery in annealed state	Some old standards allow multiple delivery states	Ensure a consistent process starting point for subsequent heat treatment
Hardness and impact properties	Specify the quenching and tempering hardness and heat treatment system of the sample (as shown in Table 2)	Unspecified heat treatment process parameters	Improve the machinability and reliability of the material

Typical application scenarios and case analysis

Case 1: Cold stamping die manufacturing

An automotive parts factory uses Cr8Mo2SiV steel (grade T21350) to manufacture cold stamping dies. After annealing + quenching + tempering heat treatment process, the die shows excellent wear resistance and toughness. Compared with traditional Cr12 steel, its life is increased by about 30%, and processing deformation is significantly reduced.

Case 2: High-load cold heading die

A precision parts manufacturer selected 7Cr7Mo2V2Si steel (grade T21317) to manufacture high-load cold heading dies. This material still maintains a hardness of ≥60HRC after high-temperature tempering and has good wire cutting performance, which is suitable for mass production of complex-shaped parts.

Implementation suggestions

Material selection optimization:Choose a suitable grade according to the specific use conditions of the mold (such as load, speed, processing accuracy, etc.). It is recommended to refer to the main characteristics and uses of each grade in Table B.1.
Heat treatment process:Strictly follow the heat treatment system specified in the standard, especially control the temperature and time parameters during quenching and tempering to ensure the best performance.
Quality inspection: Focus on key indicators such as chemical composition, macrostructure, and non-metallic inclusions. It is recommended to use GB/T 6402 ultrasonic testing method to evaluate internal defects, and combine GB/T 10561 microscopic inspection method to evaluate the level of non-metallic inclusions.
Surface treatment: For high-precision molds, nitriding or carburizing treatment is recommended to further improve wear resistance and fatigue strength. At the same time, pay attention to avoid surface decarburization (as shown in Tables 9 and 10).