The result showed the main influences of resistance wear of nozzle were materials and surface hardness as well as abrasive water-jet processing parameters .

结果表明，影响其耐磨性主要因素是喷嘴材料、 面 硬度及高压磨料水工艺参数。

The surface hardness of medium manganese austenite steel 's is increased remarkably by using the casting surface alloy .

通过铸造表面合金化方法，使中锰奥氏体钢 表面 硬度提高。

As the size of parts to be hardened increases the surface hardness decreases somewhat even though all other conditions have remained the same .

即使所有其它条件保持不变，随着要淬火的零件尺寸的增加其 表面 硬度也会有所下降。

Meanwhile high surface hardness after heat treatment the coating surface formed into the amorphous and crystalline mixture the hardness is up to1200HV .

同时 表面 硬度高，经热处理后，其镀层表面形成非晶态和晶态的混合物时，硬度可达1200HV。

When using the utility model the pass is cast with a blank roll in one body therefore ensuring surface hardness of the whole pass to be accorded with the surface hardness of the whole roll .

使用本实用新型，由于孔型是与毛坯辊一体铸造出来的，保证了整个孔型 表面 的 硬度与整个轧辊表面硬度一致。

As a result of it the surface hardness of the cermets was improved greatly .

另外氮化处理可以使材料的 表面 硬度得到较大的提高。

The nitrite chrome-molybdenum steel crankshaft guarantees the best tensile strength and surface hardness for long-time operation .

亚硝酸盐铬钼钢曲轴保证了最佳的拉伸强度和 表面的长期运作的 硬度。

Diamond CVD coating process is introduced to increase the surface hardness of cutting tools .

为增加切削刀具 表面 硬度引入了钻石化学蒸发沉淀涂层工艺。

The experiment shows that it can improve metal surface hardness and prolong service life of parts and increase the stress .

经试验证明可以大大提高金属 表面 的 硬度、零件的使用寿命及其受力情况。

The relationship between the surface hardness of ferromagnetic material and the intensity of Barkhausen noise was studied .

通过实验研究了巴克豪森噪声强度与铁磁材料 表面 硬度之间的关系。

The varieties of the microstructure and the surface hardness of the titanium alloys sheet after the deformation are analyzed by the metallography microscope SEM and the microsclerometer .

并利用金相显微镜、扫描电镜（SEM）和显微硬度计分析了冲击成形后试样组织结构和 表层 硬度的变化。

The results show that the laser melting may improve the surface hardness and wear resistance of AZ91D magnesium alloy but the corrosion resistance will not be increased .

结果表明，激光熔凝能提高镁合金的 表面 硬度及耐磨性，但未能提高其耐蚀性能。

The piston rod surface hardness and surface roughness affect its fatigue life .

活塞杆 表面 硬度和表面粗糙度对其疲劳寿命 均有影响， 表面 硬化一定程度上可 提高疲劳寿命，而表面粗糙度 越小，疲劳性能 越好。

Glass fiber encryption tensile strength increases the more enhance bubble board with size surface hardness and easy construction land mark fixed tube .

玻璃纤维加密抗张强度增大，更增强泡沫板 硬度， 表面带有尺寸标记，易于施工固定地热管。

Changes of surface hardness and wear resistances in M2 type steel implanted by Cu Al ions were reported .

报道了M2型高速工具钢在Cu、Al离子注入后 表面 硬度及抗磨损性的变化。

Study on Improving Rupture Strength and Surface Hardness of Set Gypsum

提高建筑石膏抗折强度和 表面 硬度的研究

Compared with the existing wood floor the utility model has the advantages of better surface hardness and the improvement of added value of the floor .

与现有的木地板相比具有较好的 表面 硬度，提高了地板的附加值。

Deterioration evaluation the use of corrosion depth and surface hardness as a new evaluation .

在劣化评价指标中，使用了溶蚀深度和 表面 硬度 值作为新的评价指标。

However its lower surface hardness and poor corrosion resistance confine its applied range .

但铝合金 表面 硬度低和抗腐蚀性差等特点，限制了其应用范围，因此，须对铝合金进行 表面 处理以改善其使用性能。

For obtaining high surface hardness and great thickness the main factors which affect the nitriding layer structure and properties were analyzed and the optimized parameters were obtained .

以获得较高 表面 硬度和渗层厚度为依据，分析影响渗氮层结构和性能的主要工艺因素，确定出最佳工艺参数。

The surface hardness and wear resistance of aluminum alloy are both improved by means of scanning electron beam .

电子束表面处理可以提高铝合金材料的 表面 硬度、增加耐磨性。

Meanwhile the fracture was accelerated due to the uneven surface hardness and the unreasonable distribution of the hardening layer on the crankshaft and the bad lubrication condition in service .

同时轴左颈 表面 硬度不均匀、淬硬层分布不甚合理，工作过程中润滑条件差，加速了曲轴的断裂。

A high surface temperature longer austenitization duration and the rapid cooling rates result in high surface hardness .

表面温度高、奥氏体化时间相对较长及冷却速率快导致了 表面的高 硬度。

One simple way of describing strength is in terms of surface hardness .

描述强度的一种最简单方法是以 表面 硬度来表示。

This paper describes the tribological properties of carbon / cabon composites with different surface hardness .

对等温CVD沉积所得两种不同结构的炭/炭复合材料，不同 表面 硬度下的摩擦磨损性能进行了研究。

With the characteristics of no hydrogen embrittlement thin surface coating high surface hardness and rich colors our coating technology is favored by every work of life .

无氢脆，表面涂层薄， 表面 硬度高，颜色丰富多彩，得到各行各业的青睐。

Aim : To evaluate the surface hardness and abrasion resistance of die stone model with the application of a new gypsum surface hardener .

目的：测定涂布超硬石膏表面硬化剂有机硅树脂前后石膏模型的 表面 硬度和抗磨损性能，为该石膏表面硬化剂的临床应用提供依据。

The thickness of both effective hardened layer and transition layer and the surface hardness and microstructures were studied .

并对有效硬化层深、过渡区层深、 表面 硬度变化以及金相组织进行了研究。