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以有机碳源硬脂酸替代传统的石墨粉末,采用粉末冶金法固-液混合方式掺杂碳元素,后经压制成形、高温烧结、热轧、温轧、冷轧等工艺制备TZM合金板材,并对其力学性能及组织特点进行对比分析。研究结果表明:以有机碳源采用固-液掺杂硬脂酸的TZM合金粉末比传统固-固掺杂石墨粉的TZM合金粉末混合更加均匀,组织中第二相更多、更细小、分布更均匀,第二相质点粒子对位错起到钉扎作用,阻碍晶界滑移,从而显著提高了TZM的抗拉强度,其抗拉强度为1168.23 MPa,伸长率为7.66%,较传统固-固掺杂石墨粉的TZM合金抗拉强度提高了15.3%。
Organic carbon source stearic acid instead of the traditional graphite powder, powder metallurgy method solid - liquid mixed way of carbon doping, after pressing forming, high temperature sintering, hot rolling, warm rolling, cold rolling and other processes TZM alloy sheet, And its mechanical properties and organizational characteristics of comparative analysis. The results show that the TZM alloy powder doped with solid-liquid doped stearic acid with organic-carbon source is more uniform than the TZM alloy powder with the traditional solid-solid doped graphite powder, the second phase is more and more finely distributed in the tissue More uniform, the second phase particles play a pinning role in the dislocation and obstruct the grain boundary slip, thus significantly increasing the tensile strength of TZM, the tensile strength of 1180.23 MPa, the elongation of 7.66%, more traditional The tensile strength of TZM alloy with solid-solid doped graphite powder increased by 15.3%.