我国非调质钢的发展与应用

本文综述了我国非调质钢的研究与应用情况，内容包括显微组织参数、化学成分和热加工参数等对性能的影响及非调质钢的断裂行为、疲劳性能和可切削性。文中比较了非调质钢与调质钢在上述性能方面的差异。     

Ti,N,Mg对M2高速钢凝固组织和硬度的影响

为了改善Ｍ２高速钢共晶碳化物的分布，本文利用小凝固试样变质的方法研究了Ｔｉ，Ｎ和Ｍｇ对Ｍ２高速钢凝固组织和硬度的影响。试验结果表明，加入Ｔｉ或Ｔｉ－Ｎ后，共晶碳化物形态和分布有很大改善，而加入Ｔｉ－Ｎ后对凝固组织有轻微的细化作用，但只添加Ｔｉ不补碳时，钢的淬火硬度和回火硬度均下降；加入适量的Ｍｇ可以使片状的Ｍ２Ｃ型共晶碳化物转为鱼骨状的Ｍ６Ｃ型共晶碳化物，使其分布有所改善，Ｔｉ和Ｍｇ复合加入可以明     

数控加工的基本坐标系和对刀问题

数控加工中的对刀问题影响机械加工的各个方面。这里从介绍数控机床的基本坐标系出发，重点阐述了对刀的基本原理和方法以及常见数控机床对刀问题的处理。     

Gorillas (Gorilla gorilla) and Orangutans (Pongo pygmaeus) Encode Relevant Problem Features in a Tool-Using Task.

Two important elements in problem solving are the abilities to encode relevant task features and to combine multiple actions to achieve the goal. The authors investigated these 2 elements in a task in which gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) had to use a tool to retrieve an out-of-reach reward. Subjects were able to select tools of an appropriate length to reach the reward even when the position of the reward and tools were not simultaneously visible. When presented with tools that were too short to retrieve the reward, subjects were more likely to refuse to use them than when tools were the appropriate length. Subjects were proficient at using tools in sequence to retrieve the reward. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Simulation and optimization of tool-life in manufacturing centers

This paper presents the development of an optimization and a computer-simulation model to evaluate the process plans of a manufacturing center by analyzing the effect of tool failure on system performance. The GPSS/PC simulation program that is used in this study has been built with variables, functions and matrices so that many experiments could be conducted with the model. Sensitivity analysis is presented and the developed model has proven to be useful in determining optimum sequencing of parts for various operating policies.     

Programming tool-use actions.

When humans plan to execute a tool-use action, they can only specify the bodily movement parameters by taking into account the external target or goal of the tool-use action and the target-movement mapping implemented by the tool. In this study, the authors used the movement precuing method to investigate how people prepare for actions made with tools. More specifically, they asked whether people would be able to specify the spatial target and the target-movement mapping of the tool-use action independently of each other, and to what degree they would be able to prepare these components in advance. In 3 experiments, they precued either the target or the target-movement mapping of tool-use actions involving either a compatible or an incompatible target-movement mapping. Results indicate that participants benefit from partial advance information about the target-movement mapping, whereas no significant effects were found for precuing the spatial target of the action. These results occurred regardless of whether the target-movement mapping was compatible or incompatible and provide evidence for the notion that the target-movement mapping of a tool-use action is part of its cognitive representation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of the Preheat Treatment on the Microstructure and Properties of X37CrMoV5-1 Steel

The technological properties of the hot-work tool steels depend on their microstructural quality induced by the production process and the heat treatment. One of the frequently applied methods to improve microstructure is preheat treatment. The treatment of carbonitriding X37CrMoV5-1 steel has been investigated in fluidized bed furnaces. Thickness and phase composition have been conducted using optical microscopy Neophot 32 and scanning microscopy, JEOL 5400, after etching in nital.     

浦项开发35W270以上牌号无取向硅钢

钢中加Sn和Sb得到优良的磁性，铁损低和磁感高。与加B的比较，晶粒大，立方织构、高斯织构、（100）[uvw]纤维体积份数很高和γ-纤维体积份数很低，增加磁感的磁各向异性和降低铁损的磁各向异性。进行常化与未经常化的比较，最终晶粒大。（100）纤维份数：热轧板的最低，冷扎后变成最高。铁损的各向异性与织构因数之间成反比，磁感的各向异性与织构因数之问成正比。开发出了35W270-250高牌号无取向硅钢。     

硬地层定向井中几种侧钻方法的灵活应用

在川渝地区，钻定向井、水平井必然要面对地层岩性变化大、硬度高等复杂地质情况，常常会遇到因井下复杂、事故、修改地质目标等原因需要填井侧钻。侧钻的方法不同，侧钻的成功率和效率差异很大。文中分析了川渝地区近几年硬地层定向井、水平井侧钻效率不高、有时甚至失败的原因，归纳总结了近几年常用的几种侧钻方法的施工效果，提出要根据具体条件灵活应用这几种侧钻方法。     

DLL23XA双侧向测井仪的研制

以往双侧向测井仪动态范围小，测量精度低，为此开发了DLL23XA双侧向测井仪。该仪器主要单元采用厚膜电路，稳定性、一致性好；深、浅屏流源采用可变功率控制，提高了仪器的动态范围。仪器采用3506P例进行数据传输，可方便地配接各种地面系统。