Pump Body Guide Vane Investment Castings Introduction
Material: carbon steel (20Mn5)
Standard: DIN 20Mn5
Casting process: precision casting by sodium silicate
Heat treatment method: NBK and low temperature tempering
Surface treatments: shot blasting and polishing
Technical Key Points
Ø Cold iron can be put at hot sections that is away from the riser, to prevent the tendency to crack and achieve sequence solidification.
Ø Molten steel tapping temperature be controlled between 1640 ℃ -1650 ℃, if temperature is too high, it’s easy to adsorb oxidize in the air; After tapping, slag repeatedly, then sedate for 3-5 minutes for slagging and degassing to purify molten steel. for stainless steel casting, casting temperature should be strictly controlled at 1580 ℃ -1590 ℃, thin-walled ultra-low carbon stainless steel pump body, pouring temperature can be controlled at 1590 ℃ -1610 ℃; whole processes before pouring, cover agent should be applied to prevent the molten steel surface exposed to the air, resulting in oxidative and inhalation, which will seriously affecting the quality of molten steel.
2003 Wuxi Lingtong Casting Co.,Ltd. Founded, with main products of sodium silicate silica sand precision casting and sand casting.
2005 Lingtong started to cooperate with LKL located in Netherlands, our products entered EU market.
2008 start to supply castings to WKM in China.
2012.3 our company has passed the ISO quality system registration, and has obtained ISO 9001:2008 certificate.
2015.6 butterfly valve body produced by Lingtong won the 2015 CIFEX "gold award for for quality casting" , with material WCB.
2017.1 get passed documents and on-site auditing from RUHRPUMPEN (China) Co., LTD and start cooperation.
2017.6 our vertical pump body casting won the award of "Special gold award for quality casting" in 2017 CIFEX. material is CF3M (316L stainless steel), the pump body was exported to the United States.