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

表面硬化包含一个高硬、耐磨的壳以及高韧的芯。

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

需要的力与材料的硬成反比。

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，如屈服强、延展、极限抗张强、硬、弯、击强等。

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

爪形环形断裂由表面硬偏高造成,并提出解决断裂问题的合理化建议。

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

本文主要论述了以奥氏体及索氏体为基体的高铬白口铁的组织高温硬。

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

生产实验表明,在花芯备中加入本研究备的合成胶粉,产品硬大,光泽好,着色容易。

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、高硬、高模量以及良好无缺口抗击强的特种橡胶品。

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的下降，钻刚玉侵蚀后造成硬下降，但是却有所上升。

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

摘要采用化学成分分析、硬测定、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。

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、硬测试、磨损测定，研究了硼硫共渗对渗硼层组织能的影响。

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.

钛能提高氮化层硬、增加氮化层深，并对氮化层的相组成有影响。

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，光泽计，铝笔硬计，水喷雾机等一批专业检测设备。

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、化学成分分析硬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.

考虑到着色浇铸料的质，选择具有更大硬范围，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.

深部井段地层的硬高、研磨强，钻头选型困难，特别是在高条件下机械钻速低。

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化硼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。