GB/T 11101-2020 in English
VALIDCemented carbide blanks for round rods
- Issued on:2020-03-06
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
| Standard No: | GB/T 11101-2020 |
| Document status: | VALID |
| Title in English: | Cemented carbide blanks for round rods |
| Title in Chinese: | 硬质合金圆棒毛坯 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-03-06 |
| Implemented on: | 2021-02-01 |
| Superseding: |
GB/T 11101-2009 Cemented carbide blanks for round rods
|
| Professional Classification: | GB-National Standard |
| Related Topics: | GBT11101
GB/T 11101-1989 GB/T 11101-2009 GB/T 11101-2020 Blank inspection Hair removal stick Carbide Aluminum alloy round rod Japanese standard implementation Slab quality inspection |
《GB/T 11101-2020硬质合金圆棒毛坯》由TC243（全国有色金属标准化技术委员会）归口，TC243SC4（全国有色金属标准化技术委员会粉末冶金分会）执行，主管部门为中国有色金属工业协会。
Introduction
Background of Standard Revision and Technological Evolution
GB/T 11101-2020 is the third-generation national standard for cemented carbide round bar blanks, replacing the 2009 version of the standard. The main technological evolution is reflected in:
- Delete the relevant clauses for micro-drilling of printed circuit boards and focus on the field of general cutting tools
- Strengthen the physical and mechanical properties indicators, and clarify the requirements such as porosity ≤A02B00 and non-combined carbon C00
- Optimize the dimensional tolerance system, and refine the diameter deviation classification from 5 to 6
Analysis of key technical requirements
Physical performance indicators
| Indicators | Requirements | Test methods |
|---|---|---|
| Rockwell hardness | ≥86.5HRA | GB/T 5242 |
| Transverse rupture strength | ≥1800N/mm² | |
| Macropores | 0/cm²(>25μm) | Metallographic inspection |
Dimension tolerance system
Typical application case: The allowable deviation of the 6mm diameter bar is +0.30~+0.60mm. Compared with the 2009 version of the standard, the upper limit is tightened by 0.05mm, which is more suitable for precision tool processing.
Implementation Suggestions
- Marking rules should be clearly defined during procurement (such as B3.5×38.5)
- Focus on monitoring the straightness index, and the tolerance of the 350mm length segment is adjusted from 0.8mm to 1.2mm
- It is recommended to increase the factory inspection of η phase content
Comparison of old and new standards
| Project | 2020 Edition | 2009 Edition |
|---|---|---|
| Scope of application | Delete PCB micro drilling | Include PCB application |
| Diameter segmentation | 6 intervals | 5 intervals |
| Roundness requirements | New 20-42mm range | Only up to 20mm |
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