# Nonstandard Precision Machining# Which materials are more difficult to process in turning processing/hardware processing?

1. High temperature alloy

Such as nickel-based high-temperature alloys, cobalt-based high-temperature alloys, etc. They have the characteristics of high strength, high hardness, high temperature resistance and oxidation resistance. They will generate high cutting forces and cutting temperatures during the cutting process, resulting in serious tool wear and difficult processing.

2. Titanium alloy

Titanium alloys have high chemical activity, are prone to chemical reactions with tool materials, and have poor thermal conductivity. They are prone to local high temperatures during processing, causing tool wear and workpiece deformation.

3. Stainless steel

Certain stainless steel varieties, such as high-strength stainless steel, have high toughness and work-hardening tendencies, and are prone to problems such as tool sticking and rapid tool wear during processing.

4. Hardened steel

The hardness of the quenched steel is relatively high, which requires high wear resistance and cutting performance of the tool, making it more difficult to process.

5. Composite materials

For example, carbon fiber reinforced composite materials (CFRP), etc., due to their anisotropy and unevenness, are prone to defects such as delamination and fiber pull-out during processing, and cause severe tool wear.

6. High hardness carbide

This type of material itself is extremely hard and places high demands on processing technology and cutting tools.

7. Rare metals

Such as tungsten, molybdenum, etc., which are difficult to process due to their special physical and chemical properties.

When processing these difficult-to-machine materials, it is usually necessary to select appropriate tool materials, optimize cutting parameters, adopt advanced processing technology and good cooling and lubrication conditions to improve processing efficiency and quality.