The Role of Distribution Forms of Fe-Cr-C Cladding Layer in the Impact Abrasive Wear Performance of Hadfield Steel.

Qiwen Huang,Zhang Pan,Huatang Cao,Xuanpu Dong

doi:10.3390/ma13081818

Abstract

To investigate the role of different distribution forms of Fe–Cr–C cladding layer in the impact abrasive wear performance of Hadfield steel, the over-lapped Fe–Cr–C cladding layer and dot-shaped Fe–Cr–C cladding layer were deposited, respectively, by plasma transferred arc (PTA) cladding on Hadfield steel. The microstructure, microhardness and impact abrasive wear performance of the two cladding layers under the impact of glass sand, granite and quartz sand were investigated. The results showed that both microstructures of the cladding layers were hypoeutectic Fe–Cr–C microstructures. The average microhardness of the over-lapped cladding layer and dot-shaped cladding layer was around 560 HV0.2 and 750 HV0.2, respectively. The over-lapped Fe–Cr–C cladding layer could only improve the impact abrasive wear resistance of the Hadfield steel under the wear condition of the glass sand. Meanwhile, the dot-shaped Fe–Cr–C cladding layer could improve the impact abrasive wear resistance of the Hadfield steel under all the three kinds of the abrasives because of the overall strengthening effect of its convex shape and the hypoeutectic FeCrC microstructure.

Highlights

Hadfield steels have been widely used in the field of the impact abrasive wear to produce wear-resistant components such as the jaw crusher plates and cone crusher liners because of their excellent toughness and impact hardening property [1,2,3]
Before the plasma transferred arc (PTA) cladding treatment, the surface was polished thoroughly using 400-grit abrasive paper, and the surface was cleaned with alcohol to remove dirt
The heat-affected zone with a depth of of about 30–100 μm was located between the bottom of the cladding layer and the Hadfield steelabout

Summary

Introduction

Hadfield steels have been widely used in the field of the impact abrasive wear to produce wear-resistant components such as the jaw crusher plates and cone crusher liners because of their excellent toughness and impact hardening property [1,2,3]. The characteristics of the abrasive [4,5,6,7] Such as hardness and compressive strength, have a significant influence on the impact hardening property of the Hadfield steel. When in contact with abrasives with a higher hardness and compressive strength, Hadfield steel will present a stronger impact hardening property but still at a sacrifice of more severe wear, leading to shorter service life. The over-lapped strengthening technologies such as bimetal casting technology [10] are more suitable for wear applications with a soft abrasive counterpart because of the high strength but low toughness of the strengthening layer. Discrete strengthening technologies such as cast-in technology [11] and discrete hardfacing technology [12,13] tend to meet the wear applications with both soft and hard abrasives because the strengthened layers possess combined superior strength and toughness

Methods

Results

Conclusion