MICROSTRUCTURE OF BORONITRIDING LAYER ON AUSTENITIC STAINLESS STEEL

Acta Metall Sin

1992, Vol. 28

Issue (10): 15-20 DOI:

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MICROSTRUCTURE OF BORONITRIDING LAYER ON AUSTENITIC STAINLESS STEEL

QI Lian; HUANG Qingzhu; ZHONG Sunuo (Zhongshan University; Guangzhou); LU Yaokun; LI Jianguo; RUAN Guangde (Guangzhou Institute of Mechanical and Electrical Industry)

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QI Lian; HUANG Qingzhu; ZHONG Sunuo (Zhongshan University; Guangzhou); LU Yaokun; LI Jianguo; RUAN Guangde (Guangzhou Institute of Mechanical and Electrical Industry). MICROSTRUCTURE OF BORONITRIDING LAYER ON AUSTENITIC STAINLESS STEEL. Acta Metall Sin, 1992, 28(10): 15-20.

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Abstract Microstructure of the boronitriding layer on austenitic stainless steel and the transition zone between the layer and matrix has been examined. The boronitrided layer is an even spreaded coating containing (FeM)B and (FeM)_2B borides. After boronitriding, the A_1 and A_3 line for γ region of austenitic stainless steel may be elevated over room temperature. In the B solution region, the α-phase is formed. The black dense band is an easily etched region of co-existence between α-phase and the fine borides.

Key words: austenitic stainless steel boronitriding microstructure

Received: 18 October 1992

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