Wear behaviour of boronized and duplex-treated AISI 4140 steel against DLC-coated boronized AISI 4140 disc. (3rd April 2019)

• Record Type: Journal Article
• Authors: Litoria, Aditya K.; Joshi, Akshay A.; Joshi, Manoj D.; Dixit, Garima; Singh, Digvijay; Hosmani, Santosh S.
• Is Part Of: Surface engineering. Volume 35:Number 4(2019)
• Page Start: 370
• Page End: 377
• Publication Date: 2019-04-03
• Subjects: Steels -- surface modification -- coating -- tribology -- DLC -- friction -- boride; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2018.1512198
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: Wear behaviour of the AISI 4140 steel specimens with various surface conditions was tested against the DLC-coated boronized disc of AISI 4140 steel. Specific wear rate and coefficient of friction (COF) of the as-boronized (AB) pins at 100 and 150 N loads were substantially lower than the boronized–polished (B-P) pins. COF of AB pins was in the range of 0.07–0.09. However, the COF of B-P pins was about 0.13. In case of the DLC-coated pins, underlying boronized surface outperformed the hardened–tempered surface. Wear properties of the DLC-coated pins were improved with an increase in the load. DLC coating on both contacting surfaces gave the lowest specific wear rate of 0.21 × 10 −8 mm 3 N −1 m −1, which was about 30 times lower than the B-P pins, and COF was in the range of 0.08–0.09.