Abstract
Laser surface cladded NiFeBSi-Si3N4 and NiFeBSi alloys layers on H13 steel surface were produced by continuous wave CO2 laser irradiation, respectively. The effects of Si3 N4on the microstructure and electrochemical corrosion behavior of the laser treated layer were studied using OM, SEM, XRD and potentiodynamic polarization tests. The results show that good metallurgical bonding is formed between the NiFeBSi-Si3N4 cladded layers and the H13 steel substrate. The modified surface cladding layer consists of a fine dendritic structure and without porosity and crack-free. Compared with laser cladded of NiFeBSi alloy, the NiFeBSi-Si3N4 alloy layer exhibited higher resistance to pitting corrosion in industrial die coating solution. The passive film resistances increased and the passive current density decreased.
| Original language | English |
|---|---|
| Pages (from-to) | 49-51 |
| Number of pages | 3 |
| Journal | Jinshu Rechuli/Heat Treatment of Metals |
| Volume | 31 |
| Issue number | 9 |
| Publication status | Published - Sept 2006 |
Keywords
- Electrochemical corrosion
- H13 steel
- Laser cladding
- Microstructure
- NiFeBSi-SiN alloy
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys