行业新闻

原文
Low level of development of fast valve industry China's valve industry, although in recent years fast development, but the industry's overall level is still low, low-tech products, many of the key parameters of the valve has a high dependence on imports. Some experts estimate that the level of our valves to lag behind the advanced countries, compared to 10 to 20 years. Not long ago, China's valve industry to strengthen the exchange of European valve manufacturing industry, has organized more than 10 valves in domestic corporate CEOs visit to Europe, learned a lot of valuable experience of foreign counterparts, while the valve industry compared with foreign , also see our own shortcomings. Processing technology gap In the welding process, the German company KSB valves to meet the core-level radiation resistant sealing material, and has been widely used in special cobalt-free solder powder welding; France Velan Valve Company preheating before welding, automatic welding, after welding processing equipment or in the same production line with a process to complete, whether before welding, welding, after welding process, the temperature can be automatically controlled to ensure quality of welding. Welding the valve on the domestic technology behind, and some also use the old method of welding, welders low level of technology, the solder material is also common materials, reach special valve design requirements. A lot of companies engaged in production and sales all day, little study on the improvement in the process. In forging use of new technology, the German company KSB valve materials with high temperature alloy steel F91, F22-based, while the high-pressure valve Youyi forged pieces mainly to ensure product reliability and economy. Large quantities of 600Lb of the valve using the following forging and welding, the valve is not caused by casting holes, loose and many other defects, and significantly reduce the free forging of the material waste, economy greatly improved. The domestic industry, mostly in the rough pieces of valve castings and more, forging the rarely used in the following high pressure valve 600Lb forging better described as rare. A lot of business in order to reduce this cost, mostly by steel casting, low pressure cast iron multi-use, materials, low cost, simple processing.
原文来自：http://www.diefa.org

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译文：

译文：
我国阀门行业虽然近年来发展速度较快，但行业的整体水平仍低，产品技术含量低，许多参数高的关键阀门还依赖进口。有专家估计，我国阀门水平与国外先进国家相比要落后10~20年。前不久，中国阀门行业为加强与欧洲阀门制造行业的交流，先后组织了国内10余家阀门企业的老总出访欧洲，学到了许多国外同行的可贵经验，同时与国外阀门行业相比，也看到了我们自身的不足。加工工艺上的差距在焊接工艺上，德国KSB公司为满足核级阀门的密封材料抗辐射的要求，已广泛采用特殊焊粉进行无钴焊接；法国威兰阀门公司将焊前预热、自动焊接、焊后处理在同一设备或同一条加工生产线上完成，无论焊前、焊中、焊后处理，温度都可以实现自动控制，保证焊接质量。而国内在阀门焊接上工艺落后，有的还采用陈旧的焊接方法，焊工技术水平低，所焊材料也是普通材料，达不到特殊阀门设计要求。好多企业整天忙于产销，很少在工艺上进行钻研改进。在模锻件新工艺的运用上，德国KSB公司生产阀门材质以耐高温合金钢F91、F22为主，而高压阀门又以锻造件为主，保证了产品的可靠性和经济性。对批量较大的600Lb以下的闸阀采用模锻，并进行焊接，阀门没有因铸造而造成气孔、疏松等诸多缺陷，并大大减少自由锻的材料浪费，经济性大为提高。而国内行业阀门毛坯件大都以铸造件多，采用模锻的很少，在600Lb以下压力高的阀门模锻更可谓凤毛麟角。这方面好多企业为了减少成本，大都采用铸钢件，低压的采用铸铁件多，材质成本低，加工工艺简单。

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