Coated Blade vs. Solid Fully Hardened Blade: Which to Choose?

In heavy-duty equipment such as shredders and shears, the heat treatment method of the blade directly determines its wear resistance and service life. Currently, the two most common options are **coated blades** and **solid fully hardened blades**, each with its own advantages and suitable for different working conditions.

**Coated blades** involve welding or cladding a layer of high-hardness, wear-resistant alloy onto the blade substrate. Their characteristics include extremely wear-resistant surface and controllable cost, making them suitable for high-wear but low-impact conditions, such as light scrap metal, shredded materials, and municipal solid waste. However, under strong impact conditions, the coating is at risk of peeling off.

**Solid fully hardened blades** are quenched from the surface to the interior, resulting in uniform hardness distribution and no delamination. They offer more stable impact resistance and are particularly suitable for high-load conditions such as scrap shearing and heavy-duty shredding. The disadvantage is higher manufacturing costs and more demanding processing requirements.

**Simple Selection Recommendations:**

* High Wear → Choose Coated Insert

* High Impact → Choose Full Hardening

* Continuous Heavy Load Operation → Prioritize Full Hardening

There is no "best insert," only the "most suitable insert." Choosing the right structure is more important than simply pursuing hardness.