The results show that the residual strength of the three kinds of materials declines with increasing the thermal shock temperature,and the critical temperatures for sharply decline of residual strength are 410,370 and 330.
结果表明,3组金属陶瓷试样的热震残留强度均随热震温度的升高而降低,其热震残留强度急剧下降的临界温度分别为410、370和330℃。
The influence of increasing sodium silicate addition and adding organic ester on residual strength and final strength after 24 h of sodium silicate sand was analyzed with orthogonal experiments.
通过正交试验分析了水玻璃的加入量增加和有机酯的加入对水玻璃砂的残留强度和24 h终强度的影响程度大小,结果表明:有机酯的加入使水玻璃砂的24 h终强度达到了普通水玻璃砂的要求;水玻璃加入量的减少,使有机酯硬化水玻璃砂的溃散性有较大提高。
The influences of furnace-cooling and air-cooling on residual strength values of sodium silicate sand after heating at high temperature was compared by experiment.
通过实验对比了炉冷和空冷两种冷却方式对水玻璃砂经高温加热后的残留强度值测定的影响,认为炉冷的方式更接近于铸型实际的冷却情况,得到的结果能更好的评价溃散剂真实的溃散效果。
Tensile and retained strength of microwave hardened waterglass modified with 1~# agent were investigated.
研究了1#改性水玻璃砂微波硬化后的室温强度和残留强度性能,并对其物相进行分析。
The fundamental ingredients of PEO modified sodium silicate binder are determined, and the bonding strength in room temperature and retained strength in high temperature of ester cured sand and CO2 hardening sand are tested.
确定了聚氧化乙烯改性水玻璃粘结剂的基本组分,测试了有机酯自硬和CO2气硬型砂的常温粘结强度和高温残留强度。
The results show that collapsibility agent of 24 hours with stronger strength as well as in (800℃) with weaker retained strength is more effective.
为了满足工厂生产的需要,对市场上常见的RC型等多种溃散剂作进一步对比试验,从中选取出24h强度较高且800℃残留强度较低的合理有效的溃散剂。
Furthermore, by using the unloading ratio (\$R\$) and strength residual ratio (\$f\-r\$),we can get the critical.
通过大量的室内模拟试验 ,对卸荷状态下的软粘土的抗剪强度进行研究 ,得到了不同先期固结压力下卸荷土体的τf-σ关系曲线 ,并与加荷状态的土体进行比较 ,得到了卸荷土体抗剪强度变化的一般规律 ;通过建立卸荷比 R和强度残留率 fr的概念来找寻影响卸荷土体抗剪强度变化的临界点 ;同时研究了卸荷土体的抗剪强度与卸荷比的关系、卸荷后滞留时间对卸荷土体抗剪强度的影响程度 ,发现卸荷土体的抗剪强度受卸荷比和卸荷后的滞留时间的影响很大。
With the increase of TLA mixing amount,the change correlation between the immersion residual stability or the freeze-thaw residual strength ratio of oil corrosion and TLA mixing amount presents a single peak correlation from increase to decrease,and the peak value appears when the TLA mixing amount is about 30%.
研究结果表明,油蚀对水稳定性的影响与TLA掺量和油蚀时间密切相关,其中,油蚀浸水残留稳定度和油蚀冻融残留强度比随着TLA掺量增加呈现先增后减的单峰变化关系,且峰值出现在TLA掺量为30%左右;同时,初期60 min内油蚀浸水残留稳定度的降幅占总降幅的80%以上。