Refractory metals are crucial for high-temperature applications such as fusion reactors. However, no systematic research has been reported for the influence of the impurities in refectory metals, especially at high temperatures. Our goal is an investigation of the influence of dissolved impurities on the recrystallization behavior of hot-rolled molybdenum (Mo). Two sets of 80%-rolled Mo plates with different purity levels pure Mo and non-pure Mo with the content of impurities, O, C, N, etc. are analyzed. Both isothermal and isochronous annealing experiments demonstrated that the impurities resulted in a reduction of recrystallization temperature and acceleration of texture transformation in a Mo plate. The recrystallization temperature of as-rolled non-pure Mo is about 100 °C lower than that of pure Mo. EBSD results show deformed γ-fiber texture gets weakened while {001}〈110〉 component gets strengthened at 1250 °C for pure Mo and 1150 °C for non-pure Mo, leading to the destabilization of fibrous grains. The XRD and TEM results reveal that the dislocation density of as-rolled non-pure Mo is ~2.4 times that of pure Mo. This discovery deviates from the conventional understanding of impurities or second phase particles in metals, providing better practical knowledge and opportunities to establish the technical parameters of refractory metals for high temperatures applications.

难熔金属对于高温应用（例如聚变反应堆）至关重要。但是，尚未有关于杂质在食堂金属中的影响的系统研究的报道，特别是在高温下。我们的目标是研究溶解的杂质对热轧钼（Mo）重结晶行为的影响。分析了两组具有不同纯度水平的80％轧制Mo板，其中纯Mo和非纯Mo的杂质含量为O，C，N等。等温和等时退火实验均表明，杂质导致Mo板中再结晶温度降低和织构转变加速。轧制非纯Mo的重结晶温度比纯Mo低约100℃。EBSD结果表明，在纯钼的1250°C和非纯钼的1150°C时，变形的γ纤维织构变弱，而{001} <110>组分变强，这导致纤维晶粒的失稳。XRD和TEM结果表明，轧制非纯Mo的位错密度约为纯Mo的2.4倍。这一发现偏离了对金属中杂质或第二相颗粒的常规理解，从而提供了更好的实践知识和机会。确定用于高温应用的难熔金属的技术参数。