Publication detail

In situ synthesis and strengthening of ultra high-carbon martensitic stainless steels in addition of LaB6

Shen, WJ. Nan, B. Wang, WL. Yu, LP. Zhang, QK. He, YH. Huang, XL. Yuan, GZ.

Original Title

In situ synthesis and strengthening of ultra high-carbon martensitic stainless steels in addition of LaB6

Type

journal article in Web of Science

Language

English

Original Abstract

A powder metallurgy route which is characterized by the vacuum solid state sintering is utilized to fabricate Fe-20Cr-3C and Fe-20Cr-3C-2Mo-3V-2Co ultra high-carbon martensitic stainless steels. A sintering window from 1190 degrees C to 1210 degrees C is chosen to obtain high density samples and avoid liquid phase simultaneously. The densification process is promoted by solubility effect during formation of M7C3 and grain boundary diffusion. TEM analysis demonstrates three types of reaction products: the La(BO2)(3) phase, the La2O3 phase and the La(Fe0.5V0.5)O-3 phase, after adding 0.1 wt% LaB6. The impurity elements such as S and O are absorbed following the LaB6 addition to form non-gaseous products, which promotes densification by decreasing the sintering resistance and thus contributes to the improvement of bending strength and hardness. Both of the electrochemical and immersion results lead to the fact that the corrosion resistance of the steels are improved by 0.1 wt% LaB6 addition, in 3.5 wt% NaCl solution. However, the corrosion resistance of Fe-20Cr-3C-0.1LaB(6) still can not compete with that of 316L stainless steel. Nevertheless, Fe-20Cr-3C-2Mo-3V-2Co and Fe-20Cr-3C-2Mo-3V-2Co-0.1LaB(6) after quenching at high temperature present comparable corrosion resistance with that of 316L in 3.5 wt% NaCl solution. (C) 2017 Elsevier B.V. All rights reserved.

Keywords

In situ synthesis; Vacuum solid state sintering; Ultra high-carbon martensitic stainless steel; LaB6; Mechanical properties; Corrosion resistance

Authors

Shen, WJ.; Nan, B.; Wang, WL.; Yu, LP.; Zhang, QK.; He, YH.; Huang, XL.; Yuan, GZ.

Released

25. 3. 2018

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE

ISBN

1873-4669

Periodical

JOURNAL OF ALLOYS AND COMPOUNDS

Year of study

738

Number

1

State

Swiss Confederation

Pages from

363

Pages to

371

Pages count

9

URL

https://www.sciencedirect.com/science/article/pii/S0925838817343918?via%3Dihub

BibTex

@article{BUT163369,
  author="Shen, WJ. and Nan, B. and Wang, WL. and Yu, LP. and Zhang, QK. and He, YH. and Huang, XL. and Yuan, GZ.",
  title="In situ synthesis and strengthening of ultra high-carbon martensitic stainless steels in addition of LaB6",
  journal="JOURNAL OF ALLOYS AND COMPOUNDS",
  year="2018",
  volume="738",
  number="1",
  pages="363--371",
  doi="10.1016/j.jallcom.2017.12.195",
  issn="1873-4669",
  url="https://www.sciencedirect.com/science/article/pii/S0925838817343918?via%3Dihub"
}