GB/T 36708-2018 in English
SUPERSEDEDPre-hardening high speed tool steel
- Issued on:2018-09-17
- Implemented on:2019-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$127.00
| Standard No: | GB/T 36708-2018 |
| Document status: | SUPERSEDED |
| Superseded by: |
GB/T 9943-2025 High-speed tool steels
|
| Superseded on: | 2026-02-01 |
| Title in English: | Pre-hardening high speed tool steel |
| Title in Chinese: | 预硬化高速工具钢 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-09-17 |
| Implemented on: | 2019-06-01 |
| ICS Classification: | 77.140.50-Flat steel products and semi-products |
| Chinese Classification: | H44-Profile steel and deformed steel |
| Professional Classification: | GB-National Standard |
| Related Keywords: | pre-hardened high-speed tool steel
high-speed tool steel high-speed tool steel production tool steel pre-hardening high speed tool steel introduction in-depth interpretation |
| Related Topics: | hardware high frequency
Ultra-fast workstation senior engineer GBT36708 GB/T 36708-2018 |
《GB/T 36708-2018预硬化高速工具钢》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
In-depth interpretation of GB/T 36708—2018 pre-hardened high-speed tool steel standard
Standard formulation background and technology evolution analysis
Pre-hardened high-speed tool steel (HST) is an indispensable key material in modern manufacturing and is widely used in metal cutting, drilling, milling and other fields. The formulation of GB/T 36708—2018 standard is based on the development needs of the industry and combines the technological progress and quality improvement requirements of high-speed tool steel at home and abroad.
With the advent of the era of Industry 4.0, higher requirements are placed on the performance of tool steel, including higher hardness, wear resistance and better process stability. This standard has been comprehensively revised on the original basis, introducing stricter chemical composition control and heat treatment process specifications to meet the needs of modern manufacturing.
Comparative analysis of standard frameworks
| Standard dimensions | GB/T 36708—2018 | Comparison with the old standard | Comparison with international standards (such as ISO) |
|---|---|---|---|
| Chemical composition control | - Specifies the detailed chemical composition range, including the content limits of elements such as carbon, manganese and silicon - Added the maximum allowable values of residual copper and nickel | The old standard did not make clear provisions for some trace elements | It is basically consistent with the ISO standard, but adds some national standard-specific grades. |
| Hardness requirements | - Defines the delivery hardness range of different grades- Requires that the maximum and minimum hardness difference of the same batch of steel does not exceed 1.5 HRC | The old version of the standard has a relatively general requirement for hardness | Conforms to international standards. |
| Heat treatment process | - Defines the microstructure requirements after heat treatment- Added the applicability description of powder metallurgy process | The specific requirements for heat treatment process are not clarified | In line with international advanced standards. |
Interpretation of core terms and application suggestions
Chemical composition control (Section 6.1)
The performance of high-speed tool steel depends largely on its chemical composition. For example, the addition of cobalt (Co) significantly improves the red hardness and wear resistance of the material, while vanadium (V) and molybdenum (Mo) enhance hardenability and tempering stability.
It is recommended that enterprises focus on the following points when purchasing: 1. Confirm whether the selected grade meets the requirements of specific application scenarios 2. Require suppliers to provide smelting analysis reports to ensure that the chemical composition meets the standards
Heat treatment process and metallographic structure (Section 6.5)
Heat treatment is a key link in the manufacture of high-speed tool steel. The standard specifies the qualified levels of quenching grain size, overheating degree and tempering degree to ensure that the material has a good microstructure.
In actual application, enterprises should: 1. Ensure that the heat treatment process parameters are stable 2. Regularly check the metallographic structure to evaluate the material performance
Implementation suggestions
- Supply chain management: Choose suppliers with rich experience in high-speed tool steel production to ensure the quality of raw materials and semi-finished products.
- Process control: Establish a complete testing system and conduct chemical composition analysis, hardness testing and metallographic structure inspection in strict accordance with standard requirements.
- Employee training: Regularly conduct standard interpretation and practical training for technical and inspection personnel to improve the overall technical level.
- Data analysis: Use big data analysis tools to track key parameters in the production process and optimize the production process.
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