Casehardening involves a change of surface properties to produce ahard,wear-resistant shell about a tough,fracture-resistant core.

表面硬包含一个高硬度、耐磨性的壳以及高韧性的芯。

The amount of force needed is inversely proportional to the rigidity of the material.

需要的力度与材料的硬度成反比。

Properties determined by mechanical testing, such as yield strength, ductility, ultimate tensile strength, hardness, bendability, impact strength, etc.

由机械试验决定的特性，如屈服强度、延展度、极限抗张强度、硬度、弯曲性、冲击强度等。

Ungula and ring fracture are due to higher surface hardness.The rational suggestions to settle fracture are put forward.

爪形和环形断裂由表面硬度偏高造成,并提出解决断裂问题的合议。

Ebonite is one kind of special rubber product with high strength, high modulus, high hardness and fine unnotched impact resistance.

硬质橡胶是一种具有高强度、高硬度、高模量以及良好无缺口抗冲击强度的特种橡胶品。

The paper deals with the microstructrures and hight-temperatrure hardness of highchromium white cast iron with the austenitic and sorbitic matrices.

本文主要论了以奥氏体及索氏体为基体的高铬白口铁的组织和高温硬度。

The production tests showed that the rigidity,luster and variegation degree of flower cores can be improved using the compound glue.

生产性实验表明,在花芯中加入本研的合成胶粉,产品硬度大,光泽度好,着色容易。

Fracture motorbicycle piston was analysed by means of chemical composition analysis, hardness testing, metallographic examination, and the macro and micro-fractography analysis.

摘要采用学成分分析、硬度测定、金相检验以及断口宏、微观分析等方法，对断裂的摩托车活塞进行了分析。

The white afrodite erosion creates the reducing of glass hardness and density,AZS corrosion creates hardness to descend,but the density to raise.

门）白泡石侵蚀后造成玻璃硬度和密度的下降，钻刚玉侵蚀后造成硬度下降，但是密度却有所上升。

The results show that the titanium can increase the hardness and depth of the nitro-layer,and affect the phose composition of the nitro-layer.

钛能提高氮层硬度、增加氮层深度，并对氮层的相组成有影响。

By means of analysis, hardness test, abrasion test, this paper studies the effect of boron-sulphurizing on microstructure and properties of boronized layer.

通过金相分析、硬度测试、磨损测定，研了硼硫共渗对渗硼层组织和性能的影响。

We have introduced Japanese Minolta, computerized color spectrometer, coating thickness tester, vancometer, pencil hardometer, water spraying machines and the like professional inspection equipment.

为确保品质，公司还引进日本美能达，电脑色差分光仪，膜厚机，光泽度计，铝笔硬度计，水喷雾机等一批专业检测设。

Analysis of the Stem-fillet blend fracture of exhaust valve was conducted by means of macroexamination, microstructure examination, chemical composition analysis and hardness test.

摘要采用宏、微观检验、学成分分析和硬度测试等方法对断头的排气门进行了分析。

Considering its colourable and castable nature, its extended hardness range, low wear and superior load bearing capacity, polyurethane is a smart substitute for rubber.

考虑到着色和浇铸料的性质，选择具有更大硬度范围，低磨损，优越承载能力的聚氨酯替代橡胶是明智的。

With a hardness of approximately 5 and a porcellaneous luster near its lip, the shell exhibits a silky flame structure very similar to the pearl itself.

硬度大约5左右。开口处附近呈瓷状光泽。贝所显现的丝状火焰纹结构和美乐珠很类似。

The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.

深部井段地层的硬度高、研磨性强，钻头选型困难，特别是在高密度条件下机械钻速低。

Only small amounts of wurtzite boron nitride and lonsdaleite exist naturally or have been made in the lab so until now no one had realised their superior strength.

天然存在或者实验室造的纤锌矿型氮硼和朗斯代尔石数量很少，直到现在，也没有一个人发现它们令人吃惊的硬度。