Laser surface alloying of carbon steel with Fe-Cr-Si[sub 3]N[sub 4] powders

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90246-1· OSTI ID:7045580

Huang, C C; Tsai, W T; Lee, J T ^[1]

---

1. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Materials Science and Engineering

Laser surface alloying (LSA) is a relatively new technique for producing a highly alloyed layer on metal surfaces. Surface failures such as corrosion and wear can be improved by modifying surface chemistry with LSA. It reduces the amount of scarce and costly alloying elements, while retaining the bulk properties of the substrate. The beneficial effect of nitrogen on enhancing mechanical properties and corrosion resistance, especially local corrosion, as compared with conventional austenitic stainless steels (SSs), has been reported. During the last decade, there have been intensive studies on introducing large amounts of nitrogen into the SSs. Mass alloying of nitrogen into SSs can be achieved by using techniques such as pressurized induction melting, plasma remelting, hot isostatic pressure (HIP) melting, and pressurized electroslag remelting (PESR). The PESR process in which nitrogen is added directly into the melt via a metal nitride addition has become commercially available. Whether surface modification of carbon steel with high nitrogen stainless steel is possible is of interest. In the present investigation, a technique used to produced a nitrogen-alloyed SS surface layer by laser melting the Fe-Cr-Si[sub 3]N[sub 4] powders on carbon steel is attempted. The chemical states and concentration of the alloying elements in the LSA layers are analyzed and presented.

• OSTI ID: 7045580
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 30:11; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEELS
MELTING
CARBON STEELS
EXPERIMENTAL DATA
FABRICATION
LASER RADIATION
NITROGEN ADDITIONS
SURFACE PROPERTIES
ALLOYS
DATA
ELECTROMAGNETIC RADIATION
HIGH ALLOY STEELS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
RADIATIONS
STEELS
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies