中国造出世界最大无焊缝不锈钢环形锻件_科学技术

中国造出世界最大无焊缝不锈钢环形锻件

文章来源：未知文章作者：enread 发布时间：2019-03-13 08:00 字体： [大中小]　进入论坛

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A Chinese steel mill on Tuesday rolled off the world's largest seamless ring forging piece, which was developed especially as the key part of a nuclear power unit.

中国一家钢铁厂周二制造出世界上最大的无焊缝整体不锈钢环形锻件，这个部件是为一座核电站关键部位特别打造的。

The loop-shape stainless¹ steel piece, produced by the Shandong Iraeta Heavy Industry Co. Ltd. based in east China's Shandong Province, weighs 150 tonnes and is 15.6 meters in diameter, breaking both the world records of its kind.

The product was developed by the Institute of Metal Research under the Chinese Academy of Sciences and ordered by the China National Nuclear Corporation.

It is expected to play the supporting function in a nuclear reactor² vessel³ to withstand pressure up to 7,000 tonnes.

The giant steel structure used to be forged by segmented welding assembly. However, the welding joints⁴ are vulnerable to high pressure, which poses safety concerns in nuclear power generation.

Large seamless steel forging pieces are in high demand in China's hydro-power, wind-power and nuclear-power generation industry.

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收听单词发音

1 stainless
adj.无瑕疵的，不锈的
参考例句：
I have a set of stainless knives and forks.我有一套不锈钢刀叉。 Before the recent political scandal,her reputation had been stainless.在最近的政治丑闻之前，她的名声是无懈可击的。

2 reactor
n.反应器；反应堆
参考例句：
The atomic reactor generates enormous amounts of thermal energy.原子反应堆发出大量的热能。 Inside the reactor the large molecules are cracked into smaller molecules.在反应堆里，大分子裂变为小分子。

3 vessel
n.船舶；容器，器皿；管，导管，血管
参考例句：
The vessel is fully loaded with cargo for Shanghai.这艘船满载货物驶往上海。 You should put the water into a vessel.你应该把水装入容器中。

4 joints
接头( joint的名词复数 )；关节；公共场所（尤指价格低廉的饮食和娱乐场所）（非正式）；一块烤肉（英式英语）
参考例句：
Expansion joints of various kinds are fitted on gas mains. 各种各样的伸缩接头被安装在煤气的总管道上了。 Expansion joints of various kinds are fitted on steam pipes. 各种各样的伸缩接头被安装在蒸气管道上了。

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