摘要:
Improved technology for the melting and casting of a particular class of true beta-type titanium alloys is described. A typical alloy is titanium--35% vanadium--15% chromium. By providing carbon surfaces for contacting molten beta titanium alloys of this type improved melting and casting procedures are effectuated.
摘要:
An yttria-based slurry comprising a dense grain yttria powder and a non-aqueous-based binder is used as a mold facecoat and corecoat for investment casting of reactive metals such as titanium and titanium alloys.
摘要:
Disclosed are a core composition for casting and a method for preparing a core for casting using the composition. The core composition for casting includes: molding sand; a binder that includes a water glass-based binder and an oxide film inhibitor; and an additive, thereby improving a sand removing property without releasing harmful gases.
摘要:
A composition for the preparation of articles of calcium oxide, comprising calcined calcium oxide and an organic phase consisting of at least one polyol in an anhydrous medium. The composition may be used to form linings for molds and crucibles intended to come into contact with molten metals of groups IV and V of the periodic table.
摘要:
A castable refractory material for use in the manufacture of refractory products including fused silica, ceramic fibre, microsilica and a bonding material comprising colloidal silica.
摘要:
A method is described for improving resistance to chemical attack by aluminum or magnesium in refractory components. In one method, a slurry is formed comprising-calcium silicate-containing refractory material and a barium-containing compound. This slurry is placed in a mould, then dewatered to form a component which is hydrothermally processed to form a final component. In a second procedure, a silica-containing porous refractory component is impregnated with an aqueous solution of an oxide or hydroxide of barium or strontium and thereafter dried in air.