【摘 要】
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The chemistry composition,process parameters and the test results of Q890D free boron high strength steel plate used for engineering machinery was studied.The 16~40 mm thickness steel plates with good
【机 构】
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School of Materials and Science & Engineering,Inner Mongolia University of Technology,Hohhot,010051,
论文部分内容阅读
The chemistry composition,process parameters and the test results of Q890D free boron high strength steel plate used for engineering machinery was studied.The 16~40 mm thickness steel plates with good mechanical properties that was yield strength of 930~970 MPa,tensile strength of 978~1017 MPa,elongation of 13.5~15%,the average impact energy value of more than 100 J were developed by improving steel purity,adopting the reasonable controlled rolling and cooling process,using reasonable off-line quenching and tempering process.The test plates have good crack resistance in 60℃ preheat temperature condition because of that there are no any cracks in the surfaces,cross-section and roots of welding joints.
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