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How to efficiently cut hard alloy/tungsten steel alloy round bars?
time：
2025-06-20 09:36
source：
Lizhou
cemented carbide Tungsten steel (tungsten carbide) round bars are widely used in mechanical processing and tool manufacturing due to their ultra-high hardness, wear resistance, and high-temperature resistance.
But how to correctly cut such materials? Can tungsten carbide rods be used for tool grinding? We will provide a practical guide and recommend several models of high-hardness, high-wear-resistant cemented carbide round bars.
I. How to cut cemented carbide / tungsten steel alloy round bar?
The hardness of cemented carbide is far superior to that of ordinary steel ( HRA 85-93 ), and traditional cutting tools are difficult to handle. The following are three efficient cutting methods:
1. Diamond wheel cutting machine (recommended)
Active operation : Fix the round bar to the cutting machine fixture and adjust the diamond wheel speed to 3000-5000 RPM 。
Passive cooling : Continuously spray coolant (such as water-based cutting fluid) during cutting to prevent the material from cracking due to high temperature.
Advantages : High cutting accuracy ( ±0.1mm ), suitable for round bars with a diameter of ≤20mm的圆棒。
2. Wire EDM (precision cutting)
After the cemented carbide is electrically conductive, cutting is achieved through the principle of electro-corrosion. It is suitable for complex shapes or extra-large diameters (such as 50mm and above) round bars.
Note : Requires professional equipment and is relatively expensive.
3. Laser cutting (efficient but limited)
The laser beam can quickly melt and cut the material, but it is limited for cemented carbide with a thickness exceeding 10mm . The edges may require secondary polishing.
II. Recommended cemented carbide round bar models
The following models are widely used in cutting and tool manufacturing:
Powei grade | Composition | Applicable scenarios | Diameter range | |
|---|---|---|---|---|
YG6 | LBC05 | WC-94%, Co-6% | General cutting, wear-resistant parts | 3mm-30mm |
YG8 | LBC09 | WC-92%, Co-8% | High-impact conditions (such as mining drill bits) | 5mm-50mm |
YN10 | LBC12S | WC-85%, Ni-15% | Precision tools, corrosion-resistant environments | 1mm-15mm |
III. Cemented carbide round bar 4 Core advantages
1. Excellent mechanical properties: Extremely strong resistance to deformation
Active support structure : The round bar cross-section is uniform and symmetrical. When subjected to radial pressure (such as drilling and stamping), the stress distribution is more balanced. Compared with square or irregular materials, the bending strength is increased by 30% and above.
Typical applications ：YG8 Round bars are often used in geological exploration drill bits and can withstand underground 200MPa impact loads without breaking.
2. High processing adaptability: Suitable for precision manufacturing
Turning / Grinding friendly : The cylindrical surface seamlessly connects to the chuck fixture of the CNC machine tool, and the runout error during processing can be controlled within 0.01mm It is especially suitable for manufacturing precision tools (such as PCB micro drill bits).
Case : Diameter 1mm of YN10 round bar can be directly processed into 0.3mm grade precision medical surgical blade edge.
3. Extreme environment resistance: Stability far exceeds ordinary steel
High-temperature performance : At 800℃ environment, the compressive strength of cemented carbide round bars still maintains 85% of room temperature state ( 40% The strength of ordinary high-speed steel drops to
at this time). Corrosion resistance YN series round bars can work for a long time in pH2-12 acid-base environment, and the service life is 316 times that of 5-8 stainless steel.
4. Surface finish advantage: Reduce secondary processing costs
Precision sintering process : The surface roughness of high-quality round bars can reach Ra0.4μm (Equivalent to mirror level), can save the polishing process when used directly as mold ejector pins and guide posts.
Data Comparison ：Traditional wire drawing dies are replaced with YG6 round bars, and the scratch rate of the product surface is reduced 72%。
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