Hot deformation behavior of a novel bimetal consisting of BTW1 and Q345R characterized by processing maps

Abstract

Only a few studies have been conducted on the flow behavior of the novel BTW1/Q345R bimetal, which is widely used in coal equipment. In this work, compression tests were conducted on BTW1/Q345R bimetal at a temperature range of 950 °C–1200 °C and strain rates of 0.05, 0.5, 5, and 15 s⁻¹ by using a Gleeble-3800 thermomechanical simulator. A constitutive equation was validated by referring to the Arrhenius equation during the characterization of hot workability. The computed apparent activation energy of the BTW1/Q345R bimetal was 360 kJ/mol, and processing maps under different strain conditions were drawn. Analysis of the stress-strain relationship revealed that work hardening exerted a dominant effect on the thermal deformation of the BTW1/Q345R bimetal. The processing maps predicted that the optimal processing interval will increase with strain. Results showed that thermal deformation of the BTW1/Q345R bimetal should proceed when the temperature range varies from 1182 °C to 1200 °C and the strain rate interval is from 4.2 to 15 s⁻¹.

Key words： BTW1/Q345R bimetal; constitutive equation; processing map; work hardening

Acknowledgements

This work was supported by the Applied Basic Research Project of Shanxi Province, China (Grant Nos. 201701D121078 and 201701D221143) and the National Natural Science Foundation of China (Grant No. U1510131).

References

1 Liu G Y, Gao J P, Wang J, Study on friction and wear properties between medium manganese steel BTW and Hardox500. Coal Mine Machinery, 2016, 37(1): 69–70 (in Chinese)

2 Li H B, Wang J, Cheng H C, Effect of tempering temperature on mechanical properties of high strength wear resistant cast steel. Advanced Materials Research, 2013, 791–793: 440–443

3 Li N B, Xie J P, Wang W Y. Study on organization and properties of the new wear-resistant steel. Materials Science Forum, 2011, 704–705: 1423–1428

4 Zhi C C, Ma L F, Huang Q X, Effect of reduction on bonding interface of hot-rolled wear-resistant steel BTW1/Q345R cladding plate. Journal of Wuhan University of Technology-Materials Science Edition, 2018, 33(4): 952–958

5 Zhao G H, Ma L F, Huang Q X, Microstructure evolution and recrystallization analysis of hot rolled NM360/Q345R composites. Materials Research Express, 2018, 5(7): 076502

6 Li H Y, Zhao G H, Ma L F, Microstructure analysis of hot-rolled NM500/Q345/NM500 composite interface. Materials Research Express, 2018, 6(1): 016548

7 Gao X J, Jiang Z Y, Wei D B, Constitutive analysis for hot deformation behaviour of novel bimetal consisting of pearlitic steel and low carbon steel. Materials Science and Engineering A, 2014, 595(5): 1–9

8 Ma L F, Jia W T, Lin J B, . Establishment of a constitutive model of temperature-changed rolling process for as-cast AZ31B magnesium alloy. Rare Metal Materials and Engineering, 2016, 45(2): 339–345 (in Chinese)

9 Jia W T, Ma L F, Le Q C, Deformation and fracture behaviors of AZ31B Mg alloy at elevated temperature under uniaxial compression. Journal of Alloys and Compounds, 2019, 783: 863–876

10 Sun H M, Li M Q, Liu Y G. Development of processing map coupling grain size for the isothermal compression of 300M steel. Materials Science and Engineering A, 2014, 595(5): 77–85

11 Jia W T, Xu S, Le Q, Modified Fields—Backofen model for constitutive behavior of as-cast AZ31B magnesium alloy during hot deformation. Materials & Design, 2016, 106: 120–132

12 Jia W T, Ma L F, Ma Z Y, Temperature-changed rolling process and the flow stress of as-cast AZ31B magnesium alloy. Rare Metal Materials and Engineering, 2016, 45(1): 152–158 (in Chinese)

13 Li J, Zhao G H, Ma L F, Hot deformation behavior and microstructural evolution of antibacterial austenitic stainless steel containing 3.60% Cu. Journal of Materials Engineering and Performance, 2018, 27(4): 1847–1853

14 Liu P T, Huang Q X, Ma L F, Characterization of hot deformation behavior of wear-resistant steel BTWl using processing maps and constitutive equations. Journal of Iron and Steel Research International, 2018, 25(10): 1054–1061

15 Zhang F C, Lei T Q. A study of friction-induced martensitic transformation for austenitic manganese steel. Wear, 1997, 212(2): 195–198

16 Sui D, Wang T, Zhu L, Mathematical modeling of high-temperature constitutive equations and hot processing maps for as-cast SA508-3 steel. JOM, 2016, 68(11): 2944–2951

17 Moran M J. Fundamentals of engineering thermodynamics. Journal of Thermal Analysis and Calorimetry, 1992, 60(2): 707–708

18 Wang K K, Li X P, Li Q L, Hot deformation behavior and microstructural evolution of particulate reinforced AA6061/B4C composite during compression at elevated temperature. Materials Science and Engineering A, 2017, 696: 248–256

19 Pu E X, Zheng W J, Xiang J Z H, Hot deformation characteristic and processing map of superaustenitic stainless steel S32654. Materials Science and Engineering A, 2014, 598: 174–182

20 Richardson G J, Sellars C M, Tegart W J M. Recrystallization during creep of nickel. Acta Metallurgica, 1966, 14(10): 1225–1236

21 Wang D J, Zhang R, Yuan S J. Flow behavior and microstructure evolution of a TiBw/TA15 composite with network-distributed reinforcements during interrupted hot compression. Materials Science and Engineering A, 2018, 725: 428–436