摘要
采用电炉熔炼、呋喃树脂砂造型、浇注温度为1 340～1 360℃的高温慢浇底注工艺生产单件质量超过12 t的大型风电设备用QT350-22AL轮毂铸件。针对出现的缩松面积超标、铸件与冷铁接触表面气孔缺陷等问题,采取了提高铁液出炉温度、上调CE到4.55%、加强冷铁的使用管理等措施,结果使铸件的力学性能和探伤均符合要求。
The large wind power-used QT350-22AL grade nodular iron wheel hub with mass more than 12 t/piece was produced by using induction furnace melting,using furan sand for molding,adopting the pouring process with low pouring rate,pouring temperature of 1 340～1 360 ℃ and bottom gating system.In order to solve the problem that the shrinkage porosity area was bigger than required limit,and there blowholes occurring in the locations where the casting and the chills contacting with each others,the measures such as increasing tapping temperature,increasing CE to 4.55%,intensifying the management of chills usage,etc.were adopted,and as the result,the mechanical properties and defect detection has met required specification.
出处
《现代铸铁》
CAS
2013年第3期59-62,共4页
Modern Cast Iron
关键词
铸造工艺
轮毂铸件
缩松
气孔
冷铁
casting method
wheel hub casting
shrinkage porosity
blowhole
chill
