砂型離心鑄造稀土灰鑄鐵管

The Sand Mold Centrifugal-Casting Gray Cast Iron Pipes

摘要: 用稀土硅鐵處理的砂型離心灰鑄鐵管、管體抗拉強度可提高25.9%(沖入法)和42.4%(噴吹法),其平均管體抗拉強度達到214N/mm²(沖入法)、242N/mm²(噴吹法),都超過了國際(ISO13-78)標準所規定的砂型離心鑄鐵管的指標(180N/mm²),達到了金屬型離心灰鑄鐵管的抗拉強度要求(200N/mm²)。該鑄鐵管管壁厚度比國際標準規定的薄2.2mm(14.1%)。

Abstract: The body tensile strengh of the centrifugal-casting gray cast iron pipes treated with RE can be improved to 25.9%(pouring of ladle) or 42.4% (spraying process), while their average values are 214N/mm², and 242N/mm² respectively. Both surpass the (ISO13-78) specification (180N/mm²) and reach the requirement of metal mold centrifugal-casting gray cast iron pipes. The cast iron pipe thickness is 2.2mm(14.1%) thinner than the international standard.