Introduction: Why Grades Matter in Tungsten Carbide Tools
When using tungsten carbide cutting tools, understanding the grade is key. Grades define the tool’s hardness, toughness, and best use. This guide will help you understand what tungsten carbide grades are, why they matter, and how to choose the right one.
What Are Tungsten Carbide Grades?
A タングステンカーバイドグレード is a combination of WC grains (tungsten carbide) and binder metal (usually cobalt). The ratio and size of these materials decide the tool’s strength and performance. For example:
Higher WC = more hardness
More cobalt = more toughness
Grades are labeled like YG6, YG8, YG10X, etc. Each grade is made for different jobs.
Main Properties of Tungsten Carbide Grades
Here are the top things each grade affects:
硬度: How well the tool resists wear
強靭さ: How well it resists cracking or breaking
耐摩耗性: How long the tool lasts
Heat Resistance: Important for high-speed machining
These factors are a trade-off. For example, high hardness usually means lower toughness.
Common Tungsten Carbide Grades and Their Applications
Here’s a quick look at some popular grades:
| 学年 | 硬度（HRA） | 強靭さ | 応用 |
|---|---|---|---|
| YG6 | 90.5 | 中くらい | General cutting, non-ferrous metals |
| YG8 | 89.5 | 高い | Woodworking, soft steels |
| YG10 | 91.0 | Medium-High | Steel, cast iron |
| YG10X | 92.0 | 中くらい | Precision machining, high wear |
| YG15 | 89.0 | 非常に高い | Impact loads, construction tools |
How to Choose the Right Grade
Choosing the right carbide grade depends on:
Work Material: Steel, aluminum, wood, etc.
Cutting Conditions: Speed, feed, temperature
Tool Type: Insert, end mill, drill, etc.
Finish Needed: Rough or precision surface?
If you’re working with hard steel, choose a high-hardness grade like YG10X. For shock loads (like in mining), go with a tough grade like YG15.
Hard Grades vs Tough Grades
Hard Grades:
Better wear resistance
Good for high-speed cutting
Best for continuous, stable cuts
Tough Grades:
Resist chipping
Good for interrupted or rough cuts
Useful in construction or mining
Knowing when to use each is key to performance and tool life.
Importance of Grain Size in Grades
Besides cobalt %, the 粒度 also affects the grade:
Fine-grain carbide = better edge retention
Coarse-grain carbide = better toughness
Fine-grain grades like YG10X are perfect for precision tools. Coarse grains are better for heavy-duty tools.
Grades for Coated Carbide Tools
Some タングステンカーバイド切削工具 are coated with TiAlN, TiCN, or DLC. The grade underneath still matters. Coatings improve:
Heat resistance
Lubrication
Tool life
But the base carbide grade must still match the job.
Conclusion: Matching Grade to Your Application
Using the right tungsten carbide grade can:
Boost productivity
Reduce tool replacement
Improve product quality
At 再トップ, we offer a wide range of carbide grades tailored for different tools and industries. Whether you need high-hardness grades for CNC machining or impact-tough grades for 採掘, we’ve got you covered.
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