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1)  galvanized welded pipe with plastic coating
镀锌涂塑双层卷焊管
1.
This article analyses manufacture process and preheating process of galvanized welded pipe with plastic coating,proposes mathematic model for preheating process and obtains calculation formula for preheating temperature.
分析了镀锌涂塑双层卷焊管生产工艺及预热过程,给出了预热过程数学模型,并得到预热温度计算公式。
2)  double wall brazed tube
双层卷焊管
1.
In this article the manufacturing method and characteristics of the double wall brazed tube with inner helix groove are given The effect of the parameters of inner helix groove on the heat transfer efficiency is investigated The effect of inner helix groove must be considered when strip width,sizing roll pass,mandrel diameter and sizing force are to be determine
介绍了内螺旋槽双层卷焊管的制造方法及这种管材的特点。
2.
The factors affecting on forming quality of tube has been found by simultaneous multipoint measurement of forming process of double wall brazed tube, and a control model of forming quality has been established.
通过对双层卷焊管的成型过程进行的综合测试,发现并分析了影响管筒成型质量的因素,找出了相应的控制方法,提出了成型质量的控制模型。
3)  zinc-coated tube with plastics inside
外镀锌内涂塑管件
4)  Double-wall brazed tube
双层卷焊钢管
5)  galvanized welded tube
镀锌焊缝管
6)  Zn and Mn double-coating
锌锰双镀层
1.
Mass and thickness of coating for Zn and Mn double-coating steel wire are determined by FAAS,coating immersion adopt HCl and SbCl 3,contents of Zn and Mn can be determined in the same solution,the rate of recovery of Zn 2+ is 98.
用原子吸收分光光度法测定钢丝锌锰双镀层的镀层质量及厚度 ,镀层浸取液采用盐酸加SbCl3 ,在同一份溶液中可分别测定锌量和锰量 ,Zn2 +的回收率可达 98。
补充资料:超塑锌合金
分子式:
CAS号:

性质:具有超塑性的锌基合金。其典型代表是Zn-22Al的共析合金,它具有很大的延伸率(>1000%),很小的流变应力和高的应变速率敏感性指数(m=0.5),具有良好的组织可处理性,通过强化处理,调节组织形态,可提高室温强度。该合金的超塑变形温度不高(250℃),便于生产。但它的室温综合性能不理想,如抗蠕变性能和抗蚀性能都较差,为提高其综合性能,可加入少量Cu,Mg等合金元素。常用的锌基超塑合金还有Zn-22Al-0.2Cu,Zn-4Al和Zn-5Al共晶合金。它们可用于工艺美术品、塑料模具、旋钮和橡胶制品模具的生产。

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