【英文标准名称】:Resilientfloorcoverings-Polyvinylchloridefloorcoveringswithfoamlayer-Specification;GermanversionEN651:2011
【原文标准名称】:弹性地板覆盖物.带泡沫层的聚氯乙烯地板覆盖物.规格.德文版本EN651-2011
【标准号】:EN651-2011
【标准状态】:现行
【国别】:
【发布日期】:2011-05
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分类;定义(术语);弹性的;弹性织物;地板覆盖物;泡沫橡胶;交货形式;图形符号;作标记;聚氯乙烯;特性;聚氯乙烯(PVC);PVC涂层;辊子;薄板材;规范;规范(验收);使用;磨损
【英文主题词】:Classification;Definitions;Elastic;Elasticfabrics;Floorcoverings;Foamedrubber;Formofdelivery;Graphicsymbols;Marking;Polyvinylchloride;Properties;PVC;PVCcoverings;Rolls;Sheets;Specification;Specification(approval);Use;Wear
【摘要】:
【中国标准分类号】:
【国际标准分类号】:97_150
【页数】:15P;A4
【正文语种】:英语
Product Code:SAE J423
Title:Methods of Measuring Case Depth
Issuing Committee:Metals Test Procedures Committee
Scope:Case hardening may be defined as a process for hardening a ferrous material in such a manner that the surface layer, known as the case, is substantially harder than the remaining material, known as the core. The process embraces carburizing, nitriding, carbonitriding, cyaniding, induction, and flame hardening. In every instance, chemical composition, mechanical properties, or both are affected by such practice.This testing procedure describes various methods for measuring the depth to which change has been made in either chemical composition or mechanical properties. Each procedure has its own area of application established through proved practice, and no single method is advocated for all purposes.Methods employed for determining the depth of case are either chemical, mechanical, or visual, and the specimens or parts may be subjected to the described test either in the soft or hardened condition. The measured case depth may then be reported as either effective or total case depth on hardened specimens, and as total case depth on unhardened specimens.It should be recognized that the relationship between case depths as determined by the different methods can vary extensively. Factors affecting this relationship include case characteristics, parent steel composition, quenching conditions, and others. It is not possible to predict, in some instances for example, effective case depth by chemical or visual means. It is important, therefore, that the method of case depth determination be carefully selected on the basis of specific requirements, consistent with economy.
基本信息
| 标准名称： | 重型机械通用技术条件 切削加工件 |
| 英文名称： | The heavy mechanical general techniques and STANDARDs Cutting |
| 中标分类： |
冶金 >>
冶金机械设备 >>
冶金机械设备综合 |
| ICS分类： |
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| 替代情况： | 替代JB/ZQ 4000.2-1986;被JB/T 5000.9-2007替代 |
| 发布部门： | 机械工业部治金机械标准化技术委员会 |
| 发布日期： | 1998-09-30 |
| 实施日期： | 1998-12-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2008-02-01 |
| 归口单位： | 机械工业部治金机械标准化技术委员会 |
| 出版日期： | 1900-01-01 |
| 页数： | 9 页 |
| 批文号： | 国机管[1998]400号 |
适用范围
JB/T 5000.9-1998 本标准规定了重型机械产品及零部件切削加工件的通用技术条件。 本标准适用于重型机械产品及零部件。 凡产品图样和技术文件中无特殊规定时，均应符合本标准的规定。 （注： 本标准是在 JB/ZQ 4000.2--86《切削加工件通用技术要求》的基础上，参照采用德国西马克（SMS）公司标准 SN200/6-92 与SN 200/6-96 《切削加工规范》编制的。）
前言
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引用标准
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所属分类： 冶金 冶金机械设备 冶金机械设备综合