after hardening

A new cold-box binder system for CO 2-cured phenolic resin was introduced. This binder system consists of alkaline phenol-formaldehyde, hardening promoter and additive, etc. After CO 2 gas passed through the resin sand for hardening, then higher initial and final strength can be achieved.

介绍了一种新型CO2硬化碱性酚醛树脂冷芯盒粘接剂系统，由碱性酚醛树脂和促硬剂及添加剂等组成，吹CO2气体硬化后，获得具有较高初强度和终强度的树脂砂芯。

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Computer prediction and experiment validation of microstructure and hardness distribution of parts after induction hardening

感应淬火零件组织和硬度分布的计算机预报及试验验证

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Addition Sc in Al Mg alloy can improve the tensile properties of the alloy after strain hardening and stabilization treatment

Al-Mg合金添加Sc能使该合金在应变硬化和稳定化处理后具有良好的机械性能

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Behind The Wheel Research on Hardening and Soften Treatment after Hardening of the Train Wheel Bruise

车轮踏面的硬化及硬化后的软化处理研究

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The proportion of the content of benzaldehyde to grass-type flavor for the fruit of treatment with exogenous ethylene is far higher than that of fruit after cold hardening.

同时外源乙烯处理的桃果实内苯甲醛含量占青草型香气的比例远高于冷锻炼处理的桃果实。

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Microstructure and tribological properties of two Febased sintered materials after widebond laser surface hardening were studied.

研究了两种不同成分铁基烧结材料激光扫描后的显微组织和摩擦学特性.

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The peach fruit after cold hardening does not appear the browning symptoms, and only some specific fruits appear spoilage during the later storage period ( 50d).

冷锻炼的桃果实，果肉在整个贮藏期间未出现褐变症状，仅在贮藏后期（50d以后）出现个别果实腐烂，回温果的腐烂情况有所增加。

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Steel 20 also had F+ M+ A_ ( R) multiphase microstructures after subcritical hardening in duplex phase range ( 750~ 810 ℃), strength and plasticity appeared different change with heating temperature.

20钢经双相区亚温淬火（750~810℃），也获得F+M+AR复相组织，但因加热温度不同，强度出现先升后降，塑性则呈与此相反的变化规律。

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And the concrete has good intensity and durability after hardening.

硬化后强度高，耐久抗性好。

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Lower stress sensitivity and lower yield point temperature were found after cold hardening.

发现胁强敏感度和屈服点温度受冷锻炼影响而下降，时间敏感度未表现明显变化。

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Microhardness test and residual stress measurement were done along the depth of piston rod after induction hardening to compare with the results of calculation.

对感应淬火处理的活塞杆进行了沿深度方向的显微硬度试验和残余应力测试。

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Analysis is made on gas evolution changing pattern of furane bonded sand core material after vacuum hardening, on affection to compressive strength arid the microstructure after infrared drying.

分析研究真空硬化后的呋喃树脂砂芯材料发气性变化规律、红外烘干后对抗压强度的影响及其微观结构特点。

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It emphasizes the reasons and features of cracks development of wall concrete before and after hardening.

本文对住宅墙体混凝土的早期与长期裂缝的出现原因进行了分析，着重论述了墙体混凝土硬化前后的裂缝发展的机理及特征。

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Experiment achievement analysis of detecting the strength of concrete after hardening

事后检测混凝土强度实验结果分析

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After hardening 4h and 8h the compressive strength of the patched concrete is bigger than 20 MPa, which can satisfy the request of fast patching.

修补混凝土硬化后4h、8h抗压强度大于20MPa，能满足快速修补的要求；

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Mechanical properties of three after-forged heat treatment samples are all meet or exceed the demands of performance index after hardening and tempering.

三种热处理工艺调制后的试样力学性能均达到或超过生产指标要求。

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The analysis of X diffraction of the samples after hardening showed that under shot peening conditions, the strengthening mechanism of high manganese steel had deformation twinning density and dislocation density but no Martensite strengthening.

加工硬化后试样的X衍射分析显示，在喷丸处理条件下，高锰钢的加工硬化机制为位错理论和孪晶硬化理论，没有诱发马氏体相变。

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By means of bend-rotation fatigue test, the fatigue strength of Ni based alloy-WC composite coating and uncoatings specimens were compared after hardening and tempering.

通过旋转弯曲疲劳试验，比较涂层试样与未涂层试样在调质处理后的疲劳强度。

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The life of the hammers and the teeth increase about 50% after explosive hardening.

锤破机锤头和电铲铲牙爆炸预硬后，其使用寿命可提高约50%。

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Physi-cal properties of cement paste and fresh concrete must be emphasized because of their decisive determination of the properties of cement and concrete after hardening.

特别需要重视水泥浆体和新拌混凝土的物理性质，因为就是它们，决定了水泥与混凝土硬化后的一系列性能。

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Then hardness of coatings and substrate was measured. By means of bend-rotation fatigue tests, fatigue strength of coating and uncoating specimens was compared after hardening and tempering.

然后测量涂层和基体的硬度，并通过采用旋转弯曲疲劳试验比较涂层试样与未涂层试样的疲劳强度。

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The performance and service life of blade can be greatly improved after hardening.

经过激光处理后的锯片使用性能和寿命大幅度提高。

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Variation of Thickness and Density of Metal-Grinding Disks before and after Hardening

浅析烤制前后金属磨片厚度和密度的变化

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Rolling bearing manufacturers eliminate such dimensional changes by a defined tempering process after hardening.

滚动轴承制造商通过界定回火过程等来消除淬火后的尺寸变化。

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In diffusion layer , cracks were found after hardening and tempering.

调质使得扩散层产生裂纹.

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Hardness and strength of the substrate of vacuum melting Ni based alloy-WC composite coating is low. After hardening and tempering, hardness and strength of the substrate was increased.

经过真空熔烧Ni基合金+WC复合涂层的45钢基体的硬度和强度都很低，为了提高基体的硬度，对涂层后的材料进行调质处理。

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Reason and Improvement of Grinding Crack Producting in Nut after Induction Hardening

连杆螺母高频淬火后磨削裂纹产生的原因及改进方法

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Construction practice and tests show that the lime content is a direct factor for the after hardening strength of the base course.

工程实践及试验表明：石灰的掺量对路面基层后期成型强度有直接影响。

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In the paper, there were given results of fatigue strength tests carried out on nitrided 45 carbon steel ( C-0.45%; Mn-0.65%) after precipitation hardening.

本文给出了渗氮后的45钢（C0.45%；Mn0.65%）经沉淀硬化处理后的疲劳强度试验结果。

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At the strong base, the surface of sand would been dissolved partly, and form a double salt with alkali in binder after hardening.

在强碱性粘结剂的作用下，砂粒表面会部分溶解，溶解部分固化后与粘结剂中的碱一起形成复盐；

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