Affiliation:
1. Shenyang University
2. Bmw Brilliance Automotive Ltd
3. Shenyang Shuangma Yongyuan Machinery Plant
Abstract
Effects of heat treatment process of quenching and tempering under different temperature conditions on mechanical properties of X70 grade pipeline steel bends were studied. Brinell hardness, yield strength, tensile strength, elongation and impact absorbing energy of the bends were tested by using hardness tester, cupping machine and impact testing machine, respectively. It shows that the best heat treatment process of the X70 grade pipeline steel bends is quenching at 890 °Cand thermal insulation for 26 min then water cooling followed by tempering at 590 °C and thermal insulation for 60 min then air cooling. Furthermore, the resulting hardness, yield strength, tensile strength, yield ratio, elongation and impact absorbing energy reach HB230, 595 MPa, 725 MPa, 0.82, 28% and 300 J respectively, which has excellent comprehensive mechanical properties.
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. P.J. Jacques, E. Girauh, P.H. Harlet, The developments of cold-rolled TRIP-assisted multiphase steels low silicon TRIP-assisted multiphase steels, ISIJ International. 41 (2001) 1061-1067.
2. X.Y. Zhang, C.C. Tian, H.L. Gao, et al, Effects of tempering temperature on microstructures and properties of X80 grade heat-bending bend, Transactions of Materials and Heat Treatment. 33 (2012) 59-63.
3. L.N. Duan, J.M. Wang, Q.Y. Liu, et al, Austenite grain growth behavior of X80 pipeline steel in heating process, Journal of Iron and Steel Research International. 17 (2010) 62-66.
4. X.Y. Zhang, H.L. Gao, Thermal simulate test on technologic parameters of X70 induction bends, Hot Working Technology. 9 (2005) 34-38.
5. L. Li, P. Wollants, Y. L. He, et al, Review and prospect of high strength low alloy TRIP steel, Acta Metallurgica Sinica (English Letters). 16 (2003) 457-465.
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