钢材加工配送中心浅谈

介绍了国内外钢材加工配送行业现状,阐明了建立加工配送中心的意义,并提出了建议.     

钢材配送中心及其成本数模探讨

介绍了国内钢材配送中心的发展情况,并对钢材配送中的仓储成本和配送成本进行了研究,分析了仓储和配送成本的影响因素,提出仓储配送综合成本的数学模型,并对成本的最优解进行了初步的探讨。     

包钢筹建剪切配送中心的几点思考

根据调研以及当前我国钢铁、汽车行业所面临的市场环境,分析了加工配送出现的新情况,钢铁企业为增强核心竞争力,不断加快建设剪切配送中心,并赋予加工配送中心新的功能内涵;结合包钢首瑞剪切配送中心和此行业现状,指出了当前配送中心存在的问题和风险,并对这些问题进行初步的分析探讨,为包钢建设配送网络提供有力的参考。     

新形势下钢材深加工发展方向的探讨

本文从目前我国钢铁工业的发展形势及国内市场需求的角度，探讨了钢材深加工的发展方向问题，对如何使产品从初级产品逐步向用户延伸的问题进行了分析。     

钢材加工配送中心ERP系统中原料分配模型设计与实现

针对钢材加工配送中心ERP系统中如何通过一个直观的方式去提示企业用户合理安排原材料加工，从而提高原材料的利用率的问题，结合钢材加工配送中心的企业特点，提出了原料分配模型设计并且以图形化显示的方法：同时阐述了这一模型设计原理、关键点和实现过程。     

基于提升产业链竞争力的钢铁企业钢材加工配送中心建设

发展钢材加工配送中心,已成为国内外众多钢铁企业延伸产业链,提升核心竞争力的战略选择。由于企业产品结构、营销体制的差异以及经济发展环境的不同,各企业建设和发展钢材加工中心的模式也不尽相同。面对产品同质化竞争日趋激烈、     

国内钢材加工配送中心状况的调研与思考

随着我国经济"调结构、转方式"的进一步深入,钢材消费需求必将逐步升级。钢铁企业,尤其板材比例较大、品种钢水平较高的钢铁企业将逐步缩减纯粹的钢材贸易业务,争取与下游企业建立战略合作关系,形成产、销、研以及加工配送一体的产业链。     

宝钢钢材深加工产业发展研究

介绍了宝钢钢材深加工发展情况及宝钢对钢材深加工产业的管控模式,分析了宝钢介入钢材深加工产业的原因及成功的经验。     

钢材剪切配送中心ERP系统中存货成本结算导航技术运用

针对钢材加工配送中心ERP系统中成本结算过程复杂、数据量大的问题，结合钢材加工配送中心的企业特点，提出了存货成本结算导航技术，有效地解决了这一问题。本文阐述了这一技术的关键点和实现过程。实践证明，该方法在实施过程中操作性强，简单实用，大大缩短了钢材加工配送中心的成本结算周期，提高了企业的管理水平，增强了企业的市场竞争力。     

一种新型的钢材销售方式——中厚板加工配送中心及其市场预测

钢材采取切割加工配送的方式销售，是一种新型的钢材销售方式，它引入先进管理模式，通过降低库存，提高钢材利用率来降低生产成本，实行规模经营战略，利用技术优势和交通便利条件，为不同用户提供加工配送服务。有着广阔的市场前景。     

Metallography of telluride on free cutting steel

The results of investigation and analysis of telluride and sulfides in free cutting steel containing tellurium and sulfur can be summerized as follows. No tellurium is found in steel matrix. All the tellurium exists in solid solution in manganese sulfide. The extra amount of tellurium in excess of the solubility in manganese sulfide exists as MnTe in steel. The tellurium content in manganese sulfide is 2.5 wt% on average, and the sulfur content in MnTe is about 3 wt %. In annealed steel, the content of iron solutionized in MnS (steel containing 1–2 % Mn) and in MnTe are both about 2 wt %. MnTe usually forms complex inclusions with MnS. The greater the Te/S, the higher the MnTe content in the complex inclusions. There is no single phase MnTe in steel with Te/S as high as 0.84. When steel is hot worked, MnTe deforms more easily than MnS. MnTe appears light grey in a bright field, and opaque in a dark field. In cast steel it is anisotropic and in forged steel it is isotropic under polarized light. In cold drawn steel, most of the MnS is anisotropic and remained so after annealing at 1100°C. If Te/S in steel is too high, the MnTe formed is prone to stretch in the working direction during press work. Hence, in so far as controlling the shape of the sulfide with the aid of tellurium is concerned, a Te/S of about 0.1 is appropriate. When the MnTe and MnS in steel are separated electrolytely in the four different solutions used in this work, the equilibrium potential of MnS is relatively positive, and that of MnTe is relatively negative in comparison with iron. When an organic solution (No. 3) is used, the MnS in steel can be almost completely and MnTe partly separated.     

Adiabatic instability in the orthogonal cutting of steel

The reversion of Fe-18.5 Ni-0.52 C tempered martensitic steel to austenite under shear was used to study the formation of discontinuous chips by orthogonal cutting. For certain combinations of cutting speed, depth of cut, and tool rake angle, chips with bands of reverted austenite along their sheared edges were formed. Tensile tests on the same material exhibited transformed austenite on the specimen fracture surfaces for tests conducted below 200°C. Metal cutting theory predicts that continuous plastic deformation during chip formation cannot heat the material to its reversion temperature. Analysis of the machine-sample interaction before chip separation shows that adiabatic instability can occur, resulting in localized shearing and a temperature rise to at leastA _s. Only those chips which are heated during continuous deformation to temperatures between 100° and 200°C undergo adiabatic instability and reversion. Formerly National Science Foundation Trainee, Massachusetts Institute of Technology, Cambridge, Mass.     

沸腾钢高速线材产生中心孔洞的调查及分析

针对高速线材沸腾钢盘条产生中心孔洞缺陷的情况,对４０炉有中国中心孔洞缺陷的工艺控制情况的调查,分析了产生中心孔洞缺陷的原因。     

Working ability of cutting tools made from high-speed steel powders

Contact loads have been determined on the working surfaces of high-speed steel milling cutters, in which the working conditions have been extended up to the critical ones. After set intervals, the wear on the cutting surface and the hardness have been determined. This indicates that the working life of cutters made of R6M5F3-MP steel is more than twice that of tools made of traditional R6M5F3 steel.     

邓崎琳：钢铁工业不转变发展方式没有出路

在7月30日召开的中国钢铁工业协会三届八次常务理事（扩大）会议上,中国钢铁工业协会会长邓崎琳在讲话中,重点强调中国钢铁工业转变发展方式重要性。 一、要认真贯彻落实科学发展观,切实转变钢铁工业的发展方式     

Rare earth ceramic cutting tool and its cutting behavior when machining hardened steel and cast iron

The addition of rare earth element yttrium played an important role in the improvement of both mechanical properties and wear resistance of Al2O3/(W,Ti)C ceramic cutting tool material.Mechanical properties especially the fracture toughness and flexural strength were obviously increased when a suitable amount of the yttrium were added.Wear resistance of the developed rare earth ceramic cutting tool material was higher than that of the corresponding materials without rare earth in the machining of the hardened 45# carbon steel and cast iron HT20-40.Wear modes of the Al2O3/(W,Ti)C rare earth ceramic tool materials were mainly flank wear and crater wear accompanied with slight notch wear when machining the hardened carbon steel.Wear mechanisms were major abrasive wear at low cutting speed and adhesive wear at high cutting speed.Wear modes were nearly the same except that the adhesion phenomenon in the crater area was intensified when machining cast iron.The flank wear area was relatively smooth with no obvious plowing phenomenon which was possibly concerned with the workpiece of low hardness and the adhesion phenomenon at high cutting temperature.     

一种合金焊丝模铸锭中心孔洞的成因和措施

高强度合金焊丝钢广泛用于工程机械行业,具有残余元素低、纯净度高的特点,氢、氧、氮气体元素含量均要求严格,国内该系列焊丝材料主要依赖进口。为了进一步开拓系列高端焊丝钢市场,开发了新型高强度合金焊丝钢。生产过程发现模铸钢锭轧制后探伤不合格,取样发现初轧坯横截面低倍中心出现孔洞缺陷,影响材料质量。通过低倍试验和EPMA分析结合材料成分采用Thermo-Calc软件计算固液相线,分析发现钢种固液线差值相对较小是导致钢锭中心孔洞的主要原因。采用优化钢液浇注过热度和模铸浇注时补缩控制,避免了钢锭中心孔洞缺陷的产生。     

Electrospark alloying followed by laser treatment of high-speed steel cutting tools

The effect of electrospark and laser alloying with WC-, TiC-, and TiN-based electrodes on the physicomechanical and working properties of the high-speed steels R6M5 and R6M5K5 was investigated. Laser treatment of electrospark coatings based on refractory compounds increased hardness and heat resistance, and improved the contact properties of cutting tools in their interaction with the chip, thus increasing wear resistance. The optimal conditions of electrospark and laser alloying were determined.Materials Science Institute, Ukrainian Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 5–6, pp. 11–15, May–June, 1996. Original article submitted October 18, 1994.     

Development of damage in low-carbon steel under mode I and mode II loading conditions

The geometry of plastic deformation localization zones in low-carbon steel specimens under mode II and I conditions is estimated using replicas, and the evolution of microcrack patterns in these zones is studied by acoustic emission. It is shown that, under mode II loading, the plastic deformation zone area decreases and an additional system of microcracks appears; as a result, the number of microcracks and the number of acoustic emission signals increase. The following localized fracture criteria are discussed: the concentration criterion and parameters b _C and b _AE of the length and amplitude distributions of microcracks and acoustic signals, respectively. These parameters are used to characterize and predict the fracture probability.