镶嵌不锈钢阀座DN100闸阀体的消失模铸造

Manufacturing of Wedge Rigid-Seal Gate Valve Body with Embedded Stainless Steel Valve Seat by EPC(Expandable Pattern Casting)

采用不锈钢阀座镶嵌在泡沫模样内,一次整体铸造的方法,成功生产了DN100型楔式硬密封闸阀体。其外形尺寸为220mm×229mm,质量为17kg,材质为QT450-10;采用预发密度为23～26kg/m3的STMMA珠粒成形泡沫模样,并涂刷莫来石+石英粉涂料,干燥后造型、浇注;铁水出炉温度为1550～1580℃,负压为0.03～0.05MPa。经检测,阀座与阀体为冶金结合,组织可分为结合区、珠光体、铁素体等;铸件外观无缺陷,抗拉强度为469.3MPa,伸长率为18.86%,经2.4MPa水压测试,全部合格。

The structure of DN100 wedge rigid-seal gate valve body with embedded stainless steel valve seat was introduced, and the production process of EPC ed location of valve body with valve seat was observed. sound microstructure and quality. was described. The microstructure of the jointed location of valve body with valve seat was observed. The results show that the valve body has the sound microstructure and quality.