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Solid Carbide Gear Hob Cutters
Coated tools have become the symbol of modern cutting tools, and the proportion of use in tools has exceeded 50%. Various tools used in cutting, including turning tools, boring tools, drills, reamers, broaches, taps, thread combs, rolling heads, milling cutters, forming tools, gear hob and gear shapers, etc. A coating process is used to improve their performance.
category
There are four types of coated knives: coated high-speed steel
knives, coated carbide knives, and coated knives on ceramic and
superhard material (diamond or cubic boron nitride) inserts. But
the former two types of coated knives are used the most. The
coating on ceramic and superhard material inserts is a material
with a lower hardness than the substrate. The purpose is to improve
the fracture toughness of the insert surface (can be increased by
more than 10%), reduce the chipping and breakage of the insert, and
expand the scope of application.
New coating technology
The new Ti-Al-XN coating technology is to use vapor deposition
method to coat the surface of high-strength tool substrate with a
few microns of high hardness and high wear resistance refractory
Ti-Al-XN coating, so as to reduce tool wear and prolong life. The
purpose of increasing cutting speed. It is an important achievement
achieved by the national major special project of high-end CNC
machine tools and basic manufacturing equipment.
Table of carbide hob coating types | |||||||
No | coating material | hardness(HV) | Coefficient of friction for steel (dryness) | Internal stress(Gpa) | Maximum applicable temperature (Celsius) | The color of the coating | coating structure |
1 | TIN | 2300 | 0.4 | -2.5 | 600 | golden | monolayer |
2 | AlCrN | 3200 | 0.35 | -3 | 1100 | blue grey | monolayer |
3 | TiCN | 3000 | 0.4 | -4 | 400 | blue grey | multilayer |
4 | WC/C | 1000/2000 | 0.10-0.20 | -1 | 300 | Black gray | laminal |
5 | CrN | 1750 | 0.5 | 0.75 | 700 | silver gray | monolayer |
6 | polycrystalline diamond | 8000-10000 | 0.15-0.20 | 600 | LightGray | monolayer | |
7 | iAlN | 3300 | 0.30-0.35 | 0.866666667 | 900 | Purple-grey | Nano-structure |
8 | TiCN+TiN | 3000 | 0.4 | -4 | 400 | golden | Multi-layered, sloping |
9 | TiAlN+ WC/C | 3000 | 0.15-0.20 | 0.85 | 800 | LightGray | multilayer,laminal |
10 | DLC(a-C:H) | 2500 | 0.10-0.20 | 350 | Black gray | monolayer | |
11 | TiAlN | 3300 | 0.25 | -0.866666667 | 900 | Purple-grey | Nano-structure |
12 | TiAlN | 3300 | 0.4 | 0.857142857 | 900 | blue grey | Nano-structure |
13 | TiAlN | 3500 | 0.4 | -4 | 800 | Purple-grey | monolayer |