因而研究铜在钢中的时效强化、沉淀规律具有重要意义。
The age hardening characteristic of Cu Ni Si Cr Fe alloy has been investigated in this paper.
外氧化使合金表面贫铬；内氧化将降低合金固溶时效强化效果。
The external oxidation will lead to chromium dilution in the surface layer of alloy, and the internal oxidation will decrease the strengthening effect of solution and aging treatment.
研究结果表明：研究合金有很强的时效强化效应和优良的中温特性；
The results show that, firstly, the alloy has strong aging strengthening effect and good performance at intermediate temperature;
从基体组织和沉淀相质点等方面分析了时效强化铝合金机械性能的变化规律。
From base structures and precipitated phase particles and other aspects, this paper analyses the changing laws of age-hardening aluminium alloys 'mechanical properties.
透射电镜观察表明，焊接接头各微区的显微硬度变化主要与时效强化相的析出行为有关。
TEM observation revealed that the changes in micro-hardness of micro-areas across the weld are mainly related with the precipitate evolution during the aging process.
利用差示量热法（DSC）、透射电镜（TEM）、选区电子衍射（SAED）、常规力学性能测试等手段研究了7B04铝合金时效沉淀析出及强化行为。
The ageing precipitation and strengthening behavior of 7B04 aluminum alloy were investigated by DSC, TEM, HREM, SAED and tensile testing techniques.
动态应变时效是在金属和合金中，移动着的溶质原子和运动中的位错发生交互作用时所出现的一种强化现象。
Dynamic Strain Aging (DSA) is a strengthening phenomenon in metals and alloys caused by the interaction between the diffusive solute atoms and the moving dislocation.
材料在自然时效与低温退火过程中，有沉淀强化效应产生，但导电率基本保持稳定。
There are precipitation strengthening effect during nature aging and low-temperature annealing, however, the conductivity remains stable basically.
结果表明，采用20%预变形和适当的时效处理，其强化效果最好。
It is shown that 20% deformation is best to satisfy the requirements of good dispersion strengthening.
区，使得在随后的时效过程中形成高密度的强化相，减少自然时效的不利影响，提高合金的硬度。
Pre-aging increases the density and volume of precipitates after artificial aging, which decreases the disadvantage of the nature aging and improves the hardness of auto sheets.
冷作强化非调质钢螺栓经时效处理可以稳定组织、提高强度、降低残余应力。
Aging treatment is performed for microalloyed steel for cold hardening bolt, which can stabilize its microstructure, enhance its strength and reduce its residual stress.
探索实验化学教学模式，增强化学实验教学的可操作性和时效性。
Exploration experimental chemistry educational model, enhancement chemical experiment teaching feasibility and effectiveness.
随着应变时效温度升高，强度和硬度增加，塑性和韧性下降，屈强比呈升高的趋势，形变强化指数降低。
With the strain aging temperature increasing, strength and hardness increases, plasticity and toughness decreases, yield ratio has the ascending trend, hardening index decreases.
随着应变时效温度升高，强度和硬度增加，塑性和韧性下降，屈强比呈升高的趋势，形变强化指数降低。
With the strain aging temperature increasing, strength and hardness increases, plasticity and toughness decreases, yield ratio has the ascending trend, hardening index decreases.
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