Mold surface quality affects mold life

In order to extend the service life of the mold, improve the processing quality of the workpiece, reduce the cost of mold use, and improve production efficiency. Therefore, before the mold is used, it is also the final stage of mold manufacturing. Grinding and polishing are usually performed to improve the surface quality of the mold. After grinding and polishing, many mold manufacturers and mold users also use surface treatment technology.

At present, there are many kinds of surface treatment technologies on the market, and the formed surface coatings are also diverse. We select three types of representative coatings according to the history of surface treatment technology and compare them as follows:

Titanium Nitride Film, Diamond-like Carbon Film, Amorphous Diamond Film

TiNDLCta-C

Technology history 40 years, 20 years, 5 years

Hardness HV24002000~60007000~8500

Film Forming Technology Chemical Vapor Deposition Chemical Vapor Deposition Filter Cathode Vacuum Arc

The film forming temperature is 500℃ 500℃ is less than 80℃

The film thickness range is 1~7um 0.5~4um 0.002~2um

Surface friction coefficient 0.550.150.08

Membrane base bonding strength is low, low and high

Maximum temperature of working environment 600℃400~600℃600℃

Corrosion resistance is better, better

Good decoration, better general

The price is lower, higher and higher

Important parameter description:

1. The film-forming temperature will affect the quality of the original steel. Higher temperatures will cause the steel to produce annealing or tempering effects, reducing the hardness and toughness of the substrate.

2. The film-forming technology determines whether the film is easy to fall off. Generally, newer technologies use ion implantation to embed the film on the surface of the substrate, thereby improving the bonding force of the film.

3. The hardness of the film determines the wear resistance of the plated parts.

4. The low coefficient of friction on the surface of the film is beneficial to the lubrication of the surface of the workpiece and is also a factor in improving the wear resistance.