Harvester cutter blades

Structure and Type

The structure consists of a cutting edge, a back edge, and a handle. Each of the three parts performs its own function: cutting, supporting and protecting, and fixing respectively.Classified by harvested crops, low-stem crops are suitable for rotary tillage blades and weeding blades, while high-stem crops are suitable for combined harvesting blades and plow blades.

Material selection

30MnB5 steel plate: Tensile strength 1000-1200MPa, yield strength ≥800MPa, elongation ≥10%. Thin plates are suitable for light-duty blades, and medium and heavy plates are suitable for heavy-duty blades.

Composite material: The outer and inner layers are low-alloy high-strength structural steel, and the middle layer is martensitic stainless steel, which has both strong toughness, high wear resistance and self-sharpening function.Manufacturing process

manufacturing technique ：

Hot rolling forming process: The billet is hot-rolled into shape in one go after heating, processed through multiple procedures, resulting in a continuous metal fiber structure, and then heat-treated in a high-frequency furnace to optimize hardness.

Cutting forming process: The composite blade is first made into a tube blank, which is then cut into shape after ring rolling and annealing heat treatment, and finally quenched and tempered to enhance performance.

performance requirement

Cutting performance: Efficiently cuts various crops, reduces pulling and residue, and ensures smooth cutting.

Durability: Withstands frequent cutting operations, is not prone to excessive wear, chipping or breaking, and has a long service life.

Safety: Complies with safety standards, does not loosen or fall off during work after installation, ensuring the safety of operators.

surface treatment

The core method is polishing, with a surface roughness of Ra ≤ 1.6μm.

The purpose is to reduce erosion by moisture and chemical substances, and improve wear resistance and corrosion resistance in humid environments.