Effect of Boron on Hot Workability,Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H

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Effect of Boron on Hot Workability,Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H

更新时间：2026-01-21

- Effect of Boron on Hot Workability,Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H
- Special Steel Vol. 29, Issue 2, Pages: 23-25(2008)
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- Online First：18 January 2023，
  
  Published：18 January 2008
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Effect of Boron on Hot Workability,Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H[J]. Special Steel, 2008, 29(2): 23-25.
DOI：

Effect of Boron on Hot Workability,Structure and Mechanical Properties of Austenite Heat Resistant Steel TP347H[J]. Special Steel, 2008, 29(2): 23-25. DOI：

摘要

试验钢以超临界锅炉用奥氏体耐热钢TP347H(%:0.07C、17.98Cr、10.78Ni、0.70Nb、0.0267N)为炉料，用25 kg真空感应炉在氩气保护下熔炼，并加入0～0.16%B。结果表明，当加B量≥0.02%时，试验钢奥氏体晶粒明显粗化，1200～950℃锻造时锻坯开裂。当加B量约0.01%时，奥氏体耐热钢TP347H具有最佳的综合性能：钢的室温抗拉强度为615 MPa;750 ℃

120 MPa钢的持久寿命为230 h

伸长率为42%。

Abstract

Test steels were melted by a 25 kg vacuum induction furnace in argon protective atmosphere with charging of austenite heat resistant steel TP347H (0.07C

17.98Cr

10.78Ni

0.70Nb

0.0267N) for super critical pressure boil- er and adding 0~0. 16%B. Results showed that as added ≥0.02%B the austenite grain of test steel obviously coarsened and forging billet of steel cracked as forging at 1200～950 ℃;as added about 0.01%B the austenite heat resistance steel has optimum comprehensive properties i.e. tensile strength of steel at ambient was 615 MPa

the stress-rupture life and e- longation of steel with 120 MPa at 750 ℃ were respectively 230 h and 42%.

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