Detail Information
Product Description

Detail Information
Material Grade:	YG6X, YG8, YG10X, YG15	Density (g/cm³):	14.5 - 15.0
Hardness (HRA):	89.0 - 93.5	Bending Strength (N/mm²):	≥ 1800
Impact Resistance:	Excellent	Working Temperature:	-200°C ~ +800°C
Processing Method:	Cutting, Grinding, Polishing	Tensile Strength:	700 - 1000 MPa
Tensilestrength:	Up To 2500 MPa

Product Description

Cemented Carbide Mirror-Finished Polished Punch

Product Overview

In precision manufacturing, the surface quality of a punch directly determines forming accuracy and mold service life. Our Carbide Mirror-Finished Polished Punch is specifically designed for high-precision stamping, drawing, and powder metallurgy industries. Using an ultra-fine grain carbide substrate with our exclusive mirror lapping process, it retains carbide's excellent hardness while achieving an ultimate mirror effect of Ra ≤ 0.02μm (nanolevel in some cases). This effectively solves common stamping issues such as material sticking, galling, and abrasive wear.

Key Advantages

Nano-level Mirror Effect, Eliminates Galling: Ra 0.01μm - 0.02μm with extremely low friction coefficient prevents built-up edge
Superior Wear Resistance, 3-5 Times Longer Life: Hardness HRA 89-93.5 provides significantly longer service life compared to traditional SKD11 or high-speed steel punches
Excellent Dimensional Stability: Thermal expansion coefficient approximately 1/2 that of steel maintains micro-hole precision under high-frequency stamping
Edge Breakage Resistance & Toughness Balance: Bending strength ≥ 1800 N/mm² reduces the risk of chipping

Applications

Electronics Industry: LED lead frames, connector terminals, IC packaging molds
Automotive Industry: Airbag components, high-precision fuel injection nozzles, sensor housings
Powder Metallurgy: Press-forming of carbide components
Specialty Machining: High-speed stamping of motor silicon steel sheets, high-silicon aluminum alloy blanking

Technical Specifications

Parameter Category	Item	Standard Specification / Range	Remarks
Substrate Material	Material Grade	YG6X, YG8, YG10X, YG15	Can be recommended based on application
	Density (g/cm³)	14.5 - 15.0	-
	Hardness (HRA)	89.0 - 93.5	Higher value = better wear resistance
	Bending Strength (N/mm²)	≥ 1800	Higher value = better toughness
Machining Accuracy	Roundness	≤ 0.0005 mm (0.5μm)	-
Machining Accuracy	Straightness	≤ 0.001 mm / 100mm	-
Surface Quality	Mirror Grade	Ultra-mirror / Standard mirror / Rough ground	-
	Surface Roughness (Ra)	≤ 0.01μm - 0.02μm (Ultra-mirror) ≤ 0.05μm (Standard mirror) ≤ 0.1μm (Rough ground)	Lower value = smoother surface
	Surface Luster	Bright silver / Mirror reflective effect	No tool marks, no drag lines
Dimension Range	Diameter (mm)	0.10 - 50.00	0.10-1.0mm is micro-diameter specialty
	Overall Length (mm)	20 - 300	Recommended length-to-diameter ratio ≤ 15:1
	Head Shape	Flat / Spherical (R-radius) / Tapered / Stepped / Custom profile	Fully customizable per drawing
Key Characteristics	Coefficient of Friction	≤ 0.1 (against steel, unlubricated)	Extremely low due to mirror finish
	Thermal Expansion Coefficient	Approx. 4.5 - 5.5 * 10⁻⁶/°C	Approximately 1/2 that of steel
	Modulus of Elasticity (GPa)	600 - 650	Very high rigidity, resistant to deformation
Usage Reference	Recommended Guide Bushing Clearance	0.002 - 0.005 mm (per side)	Too little clearance may cause seizure
Usage Reference	Max. Stamping Speed Reference	Application-dependent, up to 300-600 SPM	High-speed stamping requires rigid press

Customization

We support fully non-standard customization. For dimensions or special tolerances (e.g., ±0.0005mm) not listed in the table above, please contact our technical department for evaluation.

Tag:

Product Details:
Place of Origin:	China
Brand Name:	Sanxin
Certification:	ISO9001
Model Number:	SX-2274
Payment & Shipping Terms:
Minimum Order Quantity:	10pcs
Price:	Negotiation
Payment Terms:	L/C,T/T
Supply Ability:	10000 pcs/month

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Zhuzhou Sanxin Cemented Carbide Manufacturing Co., Ltd