无碳化物贝氏体钢 (CFB):第二部分
双辊铸轧镁合金的机械性能
选择性激光烧结 (SLS):第二部分
DataPLUS 模块提供上万种金属材料和非金属材料的腐蚀数据、焊接性能、尺寸与公差信息以及涂层信息。 点击这里了解更多。
Total Materia New Application Launch! 2021年1月14日
Total Materia New Application Launch! 2021年2月10日
Total Materia New Application Launch! 2021年3月10日
在使用Total Materia几个月之后,以及深刻体验过所有潜在功能之后,我非常感谢你们的卓越工作和持续稳定的升级服务。 Total Materia始终是用来达成这一目的唯一工具。
M. Manfredini Bonfiglioli Industrial Gearmotors 博洛尼亚, 意大利
我们的目标很简单,就是让 Total Materia成为全球工程师在材料领域的首选一站式解决方案
Prof. Dr. Viktor Pocajt, CEOKey to Metals AG
Shape rolling of steels is a process which requires a lot of heat and a lot of force. Reheating is carried out to around 1200°C and then the metal is continuously fed through rollers to draw the desired dimensions. Popular shapes have good application in the construction business as I, H, and U shaped beams or girders can be produced for structural integrity.
Steel is a strong material that is highly resistant to shaping at normal temperatures but this resistance lessens considerably at higher temperatures. For that reason the billets, blooms and slabs from the steelmaking process are shaped into basic products at carefully controlled elevated temperatures.
The method that is most commonly used for shaping is to heat the steel to around 1,200°C in a reheat furnace and roll the steel, squeezing it between sets of cylinders or rolls. Rolls are arranged in pairs and housed in a 'stand'.
To change the shape of a material as strong as steel the rolls must exert forces measured in thousands of tones, and must also draw the steel continuously through the rolls while reducing the thickness. Two main classes of product are produced – flat products, sheets or strips of uniform thickness, and long products - lengths of a particular cross section, ranging from rectangular bars to double flange H sections. For flat products, two horizontal rolls are set one above the other in an open housing.
For long products, a series of specially shaped and angled rolls (referred to as stands) are used to transform the section to the required shape. The figure shows the stand used to create open sections.
British, European and International standards define dimensions for a wide variety of open section shapes, notably I and H shaped sections, angle sections and channels.
In shape rolling, the work is deformed into a contoured cross section. Products made by shape rolling include construction shapes such as I-beam, L-beam, and U-channels; rail for railroad tracks; and round and square bars and rods. The process is accomplished by passing the work through rolls that have the reverse of the desired shape.
In the form of illustration, the stages in shape rolling of an H-section part can be seen in Figure 2.
Date Published: Oct-2014
输入搜索词:
搜索项
全文 关键字
标题 摘要
Heat treatment diagrams are available for a huge number of materials in the Total Materia database.
Heat treatment diagrams covering hardenability, hardness tempering, TTT and CCT can all be found in the standard dataset.
To select materials by special properties, you can use the special search check boxes in the Advanced Search module.
To define the search criteria, all you have to do is select the country/standard of interest to you from the ‘Country/Standard’ pop-up list and to check ‘Heat Treatment Diagram’ box, situated in the Special Search area of the form in the lower part of the Advanced Search page.
Click Submit.
After selecting the material of interest to you, click on the Heat Treatment link to view data for the selected material. The number of heat treatment records is displayed in brackets next to the link.
All available heat treatment information will then be displayed for the chosen material.
For you’re a chance to take a test drive of the Total Materia database, we invite you to join a community of over 150,000 registered users through the Total Materia Free Demo.