论文部分内容阅读
葛兰西实践哲学中的历史主义思想研究
【出 处】
:
长春理工大学
【发表日期】
:
2021年01期
其他文献
ER70S-6盘条生产焊丝出现拉拔断裂,通过对断裂样品进行电镜扫描以及金相分析,发现贝氏体和马氏体复合相组织是造成断裂的直接原因.根据该组织形成机制从元素偏析和轧后控冷两个方面分析,提出并实施延长盘条出罩时间、强化盘条保温效果等措施,改善盘条基体组织,解决了断丝问题.
20CrMnTiH (O)60mm热轧圆钢制造副箱中间轴,车削加工后中间轴外圆表面存在光亮环,且在光亮环中出现细小“黑点”缺陷.为研究此现象,对中间轴的化学成分、缺陷部位宏观和微观形貌、金相组织、非金属夹杂物等进行检测分析.结果 表明,由于缺陷处存在非金属夹杂物,夹杂物中含有的Al2 O3及MgO·Al2O3成分,颗粒材质较硬,在车削加工时Al2O3及MgO·Al2O3夹杂物颗粒被刀尖带出,在车刀痕表面刮擦出线状痕迹,在环境光线下造成此处与正常车刀痕表面亮度有差异,从而导致所谓“光亮环”产生.
The indentation size effect (ISE) was studied by instrumented nanoindentation and Vickers hardness measurements on poly-crystalline copper,β CuAlBe pseudoelastic and age-hardenable CuBe alloys.Variations in the load-depth curves at different loads would s
Effect of High Density Current Pulses on Microstructure and Mechanical Properties of Dual-Phase Wrou
In this study,high density electric current pulse (ECP) treatment was introduced instead of the conventional solution treat-ment,and the γ\'phase was completely dissolved under the ECP treatment within only several milliseconds at 1148 ℃.Due to the extr
Corrosion Resistance of Superhydrophobic Mg(OH)2/Calcium Myristate Composite Coating on Magnesium Al
Hydrophobic Mg(OH)2/calcium myristate (Ca[CH3(CH2)12COO]2,CaMS) and Mg(OH)2/magnesium myristate(Mg[CH3(CH2)12COO]2,MgMS) composite coatings were prepared on the alkali-treated AZ31 substrates via both elec-trodeposition and dipping methods.The morphologie
Effects of Thermally Assisted Warm Laser Shock Processing on the Microstructure and Fatigue Property
The effects of laser shock processing (LSP) and warm laser shock processing (WLSP) on the microstructure of surface hardening layer and high-cycle fatigue performance at room temperature and high temperature (600 ℃) of IN718 alloy were investigated.It has
This study investigated the oxidation behavior of a new casting Ni-based superalloy K4750 at 750 ℃-1000 ℃ in air for 100 h-1000 h by isothermal oxidation tests.The oxidation-kinetic curves were plotted by the static discontinuous weight gain method.Observ