Compression Method for Superplastic Boronizing of DSS


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Superplastic boronizing (SPB) is a new surface hardening technique utilizing the ultra high plasticity phenomenon in metals in carrying out boronizing process. In boronizing, boron atoms are diffused into the metal substrate to form a hard boride layer. In this research, a new compression method for the SPB process was introduced. A clamp with an initial compressive load of about 1960 N was used. Thermo-mechanical treated duplex stainless steel (DSS) with fine grain microstructure which can show superplastic behavior at high temperatures was used as the superplastic material. SPB experiments were conducted at temperatures between 1123 and 1223 K for durations of 1 - 6 hours. The boronized specimens demonstrated thin, smooth and compact morphology of boride layer. The boride layer thickness was within ±10 0m - ±46.2 0m. On the boride layer, only the favorable single phase of Fe2B was detected. High value of surface hardness was observed in the range of ±847 HV - ±2914 HV. The overall results from the study show that the SPB process can significantly improve the surface properties of DSS.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim




R. Hasan et al., "Compression Method for Superplastic Boronizing of DSS", Key Engineering Materials, Vols. 326-328, pp. 1745-1748, 2006

Online since:

December 2006




[1] C.H. Xu, J.K. Xi and Y.L. Yang: Heat Treatment of Metals Vol. 4(37) (1988).

[2] C.H. Xu, J.K. Xi and W. Gao: Scripta Materialia Vol. 34(3) (1996), pp.455-461.

[3] C.H. Xu, J.K. Xi and W. Gao: Journal of Mater. Processing Tech. Vol. 65 (1997), pp.94-98.

[4] C.H. Xu, W. Gao and Y.L. Yang: Journal of Mater. Process. Tech. Vol. 108 (2001), pp.349-355.

[5] R. Hasan, I. Jauhari, S. M Yunus, R.D. Ramdan and N.R.N. Masdek: Fracture and Strength of Solids VI Vol. 306-308 (2006), pp.887-892.


[6] Y.S. Han and S.H. Hong: Materials Science and Engineering Vol. A266 (1999), pp.276-284.

[7] I. Ozbek, B.A. Konduk, C. Bindal, S. Zeytin, A.H. Ucisik: Vacuum Vol. 65 (2002), pp.521-525.


[8] V. Jain and G. Sundararajan: Surface and Coatings Technology Vol. 149 (2002), pp.21-26 � 420 847 2914 0 500 1000 1500 2000 2500 3000 3500 0 1 2 4 6 Time (hours) Hardness (HV) 1223 K 1173 K 1123 K.