Recommendations for Purchasing Cut-Resistant Tungsten Wire

Cut-resistant tungsten wire is widely used in high-demand fields such as photovoltaic silicon wafer cutting, sapphire processing, precision manufacturing, and aerospace due to its high hardness, high strength, high temperature resistance, and wear resistance. The following are key purchasing recommendations for cut-resistant tungsten wire, covering performance parameters, application scenario matching, and supplier selection:

I. Clarify Performance Parameter Requirements

1. Diameter and Tolerance

The diameter range is usually 20μm to 100μm, and it needs to be selected according to the hardness of the cutting material. For example, photovoltaic silicon wafer cutting usually uses 25μm to 35μm, and sapphire processing requires a finer 20μm to 25μm.

The tolerance must be controlled within ±0.5μm to ensure cutting accuracy.

2. Tensile Strength

The tensile strength must be ≥3500MPa, and high strength can reduce the risk of wire breakage.

3. Linearity and Anti-Drooping

Linearity requires that the natural drooping length of 1000mm wire length is ≤700mm to avoid shaking during cutting.

Anti-drooping needs to meet the tension requirements of the equipment to ensure cutting stability.

4. Ovality and Surface Quality

Ovality must be ≤0.6μm, surface roughness must be ≤0.2μm, and cutting resistance must be reduced.

5. Service Life

A single tungsten wire must support a cutting length of ≥126km to reduce the frequency of replacement.

II. Matching Application Scenario Requirements

1. Photovoltaic Silicon Wafer Cutting

Tungsten wire with a diameter of 25μm to 35μm and a tensile strength of ≥3500MPa must be selected to ensure the yield rate of thin-film cutting (<100μm).

2. Sapphire Processing

Tungsten wire with a diameter of 20μm to 25μm and a surface roughness of ≤0.2μm is required, and the Ra roughness is 0.2μm.

3. Aerospace Composite Material Cutting

High-toughness tungsten wire is required to avoid delamination of carbon fiber composite materials and retain the original mechanical properties of the material.

4. Electric Spark Wire Cutting (EDM)

Requires high melting point (3422℃) tungsten wire, suitable for cutting hard materials such as tungsten alloy and hardened steel, with a tolerance of ≤±1μm.

III. Supplier Selection

Prefer suppliers with ISO 9001 quality management system certification.

For example, CTIA GROUP has a complete industrial chain, and its products cover photovoltaics, sapphire, aerospace and other fields, providing customized services. Contact email sales@chinatungsten.com.

IV. Cost and Supply Chain Considerations

1. Cost Comparison

The price of tungsten wire is affected by diameter and tensile strength. The price of 30μm tungsten wire is about 1.2 times that of 35μm.

It is necessary to balance performance and cost to avoid over-purchasing.

2. Supply Chain Stability

Choose merchants with stable supply chains, such as CTIA GROUP LTD and its parent company, which have been working in the tungsten and molybdenum products industry for nearly 30 years and specialize in flexible customization of tungsten and molybdenum products. Global services can be customized according to customer needs. Tungsten and molybdenum products of various specifications, performances, sizes and grades can be customized to ensure long-term supply.

3. After-Sales Service

Suppliers are required to provide technical support such as cutting parameter optimization and wire break analysis to reduce the risk of use.

V. Risk Control

1. Avoid Low-Price Traps

Beware of products that are 20% lower than the market price, which may have problems such as uneven diameter and insufficient tensile strength.

2. Contract Terms

Performance parameters, delivery period, warranty period and other terms must be clearly stated in the contract.

3. Sample Testing

Sample testing is required before large-scale purchases to verify indicators such as cutting efficiency and yield rate.

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