| Autor: |
KANG Fu-wei, SUN Ru-wei, ZHANG Qi-feng |
| Předmět: |
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| Zdroj: |
Journal of Harbin University of Science & Technology; Jun2014, Vol. 19 Issue 3, p10-14, 5p |
| Abstrakt: |
In order to research the effects of heat treatment processing on the microstructure and mechanical properties of 35NCD16 alloy steel' the microstructures and properties of the materials after being quenched at 875 °C and tempered at 550 °C' 560 °C' 570 °C and 580 °C' respectively' were observed and tested by metallomicroscope' SEM' tensile testing' hardness testing and fracture scanning. The variation of microstructures and mechanical properties were analysed' and the heat treatment processing was optimized. The results show that the microstructures of 35CND16 alloy steel improved effectively after quenching at 875 °C and high temperature tempering. In the range of experimental temperatures' secondary hardening of 35CND16 steel occurred at the temperature of 550 °C and 560 °C' and it is more obvious at 550 °C. The maximums of the hardness' the tensile strength and elongation are got' namely 42.07 HRC' 1 309 MPa and 15.42%' respectively. The fractures are characterized as the type of micropore accumulation' and small dimples are distributed in big dimples. When the temperature is above 560 °C' the overaging appeared. At 580 °C' the hardness decreases to 35. 13 HRC' the tensile strength is low to 1 048 MPa and elongation is 12. 83%. As a result' quenching at 875 °C and tempering at 550 °C is the best heat treatment processing of 35CND16 alloy steel. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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