渗

The microstructure, phases composition and microhardness of the coating were analyzed and measured by SEM, XRD and microhardness testers respectively, and the friction and wear properties of the specimens sliding against Al2O3 ceramic in a ball-on-discmode and under unlubricated condition were investigated.

中文摘要：采用粉末包埋法在P110钢表面制备渗铬层；借助扫描电子显微镜、X射线衍射仪和显微硬度计，对渗铬层的显微组织、相组成和显微硬度进行了分析和表征，并通过无润滑条件下的球－盘式摩擦磨损试验研究了渗铬处理对其摩擦磨损性能的影响。

The network seepage flow analysis method of rock masses is a numerical method compatible with Block Element Method on the basis of the assumption that the rock blocks are unpermeable while the discontinuities are permeable.

岩体网络渗流分析方法是在假定岩石块体不透水、岩体中渗流仅通过结构面进行的基础上建立起来的一种与块体单元法配套的岩体渗流数值模拟方法。

This dissertation makes horizontal well and symmetric multibranch horizontal wells as research object, according to reservoir characteristics and the seepage process of horizontal well, using multidisciplinary knowledges comprehensively including reservoir geology, reservoir seepage theory, point source function, Green function, conformal transformation, partial differential equation and computational mathematics et al, then researches theory and method suitable for describing seepage process and productivlty calculation of horizontal well.

本文以水平井和对称多分支水平井为研究对象，从油气藏的储层特征和水平井的渗流过程出发，综合运用油气藏地质、油气藏渗流理论、点源函数、Green函数、保角变换、偏微分方程及计算数学等多学科知识，研究出适合于描述水平井渗流与产能计算的理论与方法，主要取得了以下成果

Powder aluminizing technique was used to fabricate aluminizing layer on the surface of Q235 steel.

用粉末渗铝技术在Q235钢表面上制备了不同铝含量的渗铝层，通过阳极极化曲线测试了渗铝试样在35g/LNaCl溶液中的电化学腐蚀性能。

The aluminizing velocity is fast,the aluminizing layer is thick and has good oxidation resistance when the carbon content of steel is low.

含碳量较低的钢有较快的渗速，较深的渗层，而且渗层有较高的抗氧化性能和耐腐蚀性能。

It is generally agreed that expanded-connecting method can't be used for aluminizing tubular because of its higher hardness.

一般认为，渗铝管用于管式换热器是不能采用胀接的，其理由在于管子渗铝后，渗铝层硬度很高。

Use of the hot-dip aluminizing steel in the heat exchanger of a distillation system shows that the service life of the heat exchange tubes is improved by more than 2 times.

近20年来，华中科技大学实施校厂联合对热浸渗铝工艺和热浸渗铝钢的性能进行了较系统的研究＼，基本解决了热浸渗铝钢的生产和加工等问题

In order to improve anti-corrosion and anti-oxidation properties of Q235 steel,the processes of chro maluminizing were studied based upon the results of chromizing and aluminizing of this steel.

为提高Q235钢的耐氧化性和耐蚀性，进行了渗铬和渗铝，在此基础上进行了铬铝共渗。

On the basis of the training of network, the mathematics model on the relationship between double glow plasma carbonizing and prediction of properties is built.

将人工神经网络理论和算法应用于双辉离子渗碳的研究，在对人工神经网络训练的基础上，建立了双辉离子渗碳工艺与渗层性能预报的数学模型。

According to the microalloying and strengthening and toughening principles of steel,a theoretical calculation method and optimum alloying design to determine titanium content in carbonizing steel were proposed.

根据钢铁材料的微合金化原理和强韧化原理，对广泛使用的含钛渗碳钢的钛含量进行了理论计算分析和优化设计，结果表明，适当降低钛含量，不影响其在渗碳过程中阻止奥氏体晶粒长大的作用，但可有效地减少或消除含钛渗碳钢中的液析氮化钛，从而提高钢材的力学性能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。