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首页> 外文期刊>材料と環境 >Development of Valve Seat Materials (Co-free Seat Materials) for High Temperature and High Pressure Services
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Development of Valve Seat Materials (Co-free Seat Materials) for High Temperature and High Pressure Services

机译：开发用于高温和高压服务的阀座材料（无钴阀座材料）

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摘要

Cobalt based overlaying materials have been widely used as valve seat materials for high temperature and high pressure services, because of the high corrosion and wearing resistances. In nuclear power plants, however, the cobalt-based alloys would be the potential source of ~(60)Co in the reactor water, thus alternate materials (Co-free materials) have been required and studied, especially for use as the large size valve seats on the feed water and condensate lines. From the results of a screening wearing test (sliding distance: 6 mm), some Ni-based alloys were selected as the most promising material. Then sliding tests (sliding distanc: 20 mm) and mechanical tests were performed on the selected candidate alloys.In conclusion, two Ni-based alloys, that is, A-1 (10Cr-4.5Si-0.2B-40Fe-Bal. Ni) and A-3 (10Cr-4.5Si-0.2B-40Fe-Bal. Ni) were confirmed to be useful for large size valves for high temperature and high pressure services, and the mechanical properties of both alloys were similar to those of the conventional cobalt based material.
机译：钴基覆盖材料由于其高腐蚀和耐磨性而被广泛用作高温和高压应用的阀座材料。但是，在核电厂中，钴基合金可能是反应堆水中〜（60）Co的潜在来源，因此需要和研究替代材料（不含Co的材料），尤其是作为大尺寸材料使用时进水和冷凝水管线上的阀座。根据筛分磨损试验的结果（滑动距离：6 mm），选择了一些镍基合金作为最有前途的材料。然后对选定的候选合金进行了滑动测试（滑动距离：20 mm）和力学性能测试。最后，得出了两种镍基合金，即A-1（10Cr-4.5Si-0.2B-40Fe-Bal。Ni）。 ）和A-3（10Cr-4.5Si-0.2B-40Fe-Bal。Ni）被证实可用于高温高压应用的大型阀门，并且两种合金的机械性能与常规的钴基材料。

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