scholarly journals Improvement in wear resistance of stainless steel by laser-induced local surface treatment

2016 ◽  
Vol 10 (5) ◽  
pp. JAMDSM0079-JAMDSM0079 ◽  
Author(s):  
Atsushi EZURA ◽  
Hikaru YOSHIMINE ◽  
Koki OHKAWA ◽  
Kazutoshi KATAHIRA ◽  
Jun KOMOTORI
Author(s):  
Atsushi EZURA ◽  
Hikaru YOSHIMINE ◽  
Koki OHKAWA ◽  
Kazutoshi KATAHIRA ◽  
Jun KOMOTORI

Stainless steel is used widespread in various industries, but it has poor wear resistance. Therefore, this study aims to investigate the wear resistance of enhanced surface of 316L stainless steel by applying the combination of surface treatments that consist of shot blasting followed by paste boronizing. Glass beads with diameter 250 microns and the blasting pressure of 6 bar has been used as the shot material in conducting shot blasting process. Paste boronizing process was conducted at temperature 950°C for 8 hours soaking. Data were collected and analyzed which concentrating on the samples’ microstructure, microhardness and wear evaluation. Shot blasting improves the case depth of boride layers formed after performing paste boronizing by boosting the boron diffusion owing to the grain refinement created by shot blasting. The ultimate combination of shot blasting and paste boronizing parameters enhance the case depth of the smooth and compact boride layers with high boron content. The hardness performance increase 624% compared to untreated 316L stainless steel which also highly improve the wear resistance of the material. In this investigation, these dual processes of surface treatment which are shot blasting and paste boronizing can be applied in fabricating the improved 316L stainless steel for industrial usages.


2018 ◽  
Vol 786 ◽  
pp. 87-97 ◽  
Author(s):  
A.A. Hussein ◽  
Samar Reda Al-Sayed ◽  
Salah I. Hassab Elnaby ◽  
Adel A. Nofal ◽  
Haytham Elgazzar

Conventional surface treatment processes are known to suffer from several limitations. Among them are energy consumption, complex heat treatment schedules and non-controllable heat affected zones. On the other side, when a high powered laser beam is used as a source of heat for surface treatment it will obviate most of these limitations. Laser surface engineering is one of these advanced surfacing technologies that receive growing interest to improve the surface properties of metals such as hardness, wear and corrosion resistance. Such treatments may be divided into two main categories: (i) those which only involve microstructural modification e.g. laser hardening and laser melting and (ii) other processes which lead to dual changes in microstructure and surface chemistry such as laser alloying and laser cladding. This paper comprises the experimental findings of two significant examples for laser surface engineering. The first study is concerned with surface hardening of AISI 416 martensitic stainless steel whereas the second study involves laser surface cladding of Ti-6Al-4V alloy. The outcome of the first work is a notable improvement of toughness at the same level of hardness and wear resistance as compared to the conventional hardening treatment. Additionally, the optimum condition for combined wear resistance, impact toughness and corrosion resistance was recorded at a laser heat input value of 21 J•mm-2. The second study is concerned with laser surface cladding of the titanium alloy with a powder blend composed of 60 wt% of WC and 40 wt% NiCrBSi alloy, by means of a high power Nd:YAG 2.2 kW laser. The best clad layers were obtained at a specific heat input of 60 J•mm-2. More than three-fold enhancement of the microhardness of the clad layers was achieved combined with a remarkable improvement of the alloy wear resistance.


Alloy Digest ◽  
1998 ◽  
Vol 47 (4) ◽  

Abstract Deltalloy 4032 has good machinability and drilling characteristics when using single-point or multispindle screw machines and an excellent surface finish using polycrystalline or carbide tooling. The alloy demonstrates superior wear resistance and may eliminate the need for hard coat anodizing. Deltalloy 4032 is characterized by high strength and a low coefficient of thermal expansion. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion and wear resistance as well as machining and surface treatment. Filing Code: AL-347. Producer or source: ALCOA Wire, Rod & Bar Division.


Alloy Digest ◽  
1986 ◽  
Vol 35 (11) ◽  

Abstract ENPLATE NI-423 is a nickel-phosphorus alloy deposited by chemical reduction without electric current. It is deposited by a stable, relatively high-speed functional electroless nickel process that produces a low-stress coating with good ductility and excellent resistance to corrosion. Its many uses include equipment for chemicals and food, aerospace components, molds and electronic devices. This datasheet provides information on composition, physical properties, and hardness. It also includes information on corrosion and wear resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: Ni-343. Producer or source: Enthone Inc..


Alloy Digest ◽  
2013 ◽  
Vol 62 (8) ◽  

Abstract Carpenter CTS-BD30P alloy is a powder metal processed, air-hardening, martensitic stainless steel that offers corrosion resistance comparable with Type 440C stainless, combined with excellent toughness and wear resistance attributed to a high concentration of vanadium carbides. The Carpenter CTS family of alloys is used for many blade applications. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as heat treating and powder metal forms. Filing Code: SS-1154. Producer or source: Carpenter Specialty Alloys.


Alloy Digest ◽  
1988 ◽  
Vol 37 (3) ◽  

Abstract COMPAX is a chromium-molybdenum shock-resistant tool steel characterized by high toughness, good wear resistance, good through hardening and good dimensional stability during hardening. This datasheet provides information on composition, physical properties, hardness, elasticity, and compressive strength. It also includes information on heat treating, machining, joining, and surface treatment. Filing Code: TS-488. Producer or source: Uddeholm Steel Corporation.


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