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Shentong, China

Xu Z.-X.,Nanjing Southeast University | Yu X.-Q.,Nanjing Southeast University | Gu Y.,Jiangsu Shentong Valve Co. | Zhang Y.-F.,Nanjing Southeast University
Cailiao Kexue yu Gongyi/Material Science and Technology

The SolidWorks and JSCAST software are used to simulate the mold filling and solidification process of nuclear power butterfly valve body, and the prediction of phenomena of bad filling wrapped gas during mold filling process and the location of shrinkage, shrinkage porosity in solidification process are given, at last, the filling and solidification process are optimized. The simulation results show that the smooth filling process and order solidification can be achieved and the temperature difference between the parts of casting is small after filling. The hot spot defects almost disappear, and the shrinkage and porosity decreases. The actual production has verified the simulation results. Source

Jiangsu Shentong Valve Co. | Date: 2014-01-21

Metal laths; alloys of common metal; metal valves not being parts of machines; pipe work of metal including those from alloy steel and titanium; metal pipes; tubes of metal; metal ropes; metal containers for the storage and transportation of goods; industrial packaging containers of metal; steel frames for building. Electric hammers; metalworking machine tools; hand-held tools other than hand-operated, namely, electric marble cutters, electric planers, electric wood routers, electric sanders, electric wrenches, electric screwdrivers, electric hand drills, cordless power drills; valves being parts of machines; electric pumps.

Shen G.,Jiangsu Shentong Valve Co. | Wu X.,Jiangsu Shentong Valve Co.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

There exists three kinds of inclusions, such as long-bar AlN, polygonal Al2O3 phase and near-spherical MnS, in super duplex stainless steel SAF2507 through SEM (scanning electron microscope) observation. The crack is closely related with the excess inclusion content, which has affected greatly the elongation, fracture area rate, resistant fatigue strength. By using water knife cutting technology, crack resulted from the common gas cutting could be avoided, and cut surface exhibited smooth with compact structure. Source

Shen G.,Jiangsu Shentong Valve Co. | Huang G.,Jiangsu Shentong Valve Co. | Shen J.,Jiangsu Shentong Valve Co.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

Amounts of gas holes (shrinkage holes)were generated in SAF2507 super duplex stainless steel DN1200 body produced by alkaline phenolic resin sand, resulting in the scrap as a result of not be welded from microstructure porosity. Based on analyzing the material characteristics, through adopting the middle-gating system and the high-performance heat riser to improve the surface temperature to postpone solidification time, the gas holes (porosities) in the valve body can be decreased greatly as a result of the complete exhaustion of gas in the liquid steel, obviously improving the quality of the valve body. Source

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