Titanium chrome alloy lost-foam casting flame retardant coatings

Abstract

The invention provides a Ti-Cr alloy disappearance casting flame retardant coating, which is characterized in that weight contents of various composition of the flame retardant coating are: 46 to 58 percent of swell soil, 10 to 13 percent of binder, 13 to 22 percent of suspending agent, 12 to 17 percent of flame retardant agent and 3 to 9 percent of silica solution. The binder consists of 35 to 45 percent of corn starch; 3 to 5 percent of poly water-soluble cellulose ether, 0.5 to 4.5 percent of vinyl ethanol, 15 to 25 percent of solid organic acid, the residual water or 45 to 55 percent of phosphoric acid, 33 to 45 percent of aluminum dehydrogenate phosphate, 5 to 15 percent of boric acid and 6 to 12 percent of citric acid monohydrate. The suspending agent consists of 50 to 60 percent of artificial mica, 8 to 12 percent of sodium borate, 5 to 8 percent of phosphoric acid and the balance being water ethyl acetate. The flame retardant agent consists of 35 to 45 percent of cobalt aluminate, 28 to 36 percent of magnesium chloride and 24 to 29 percent of potassium chloride. The casting flame retardant coating can improve the surface quality of casting products effectively and the finish of the casting products, and has cohesive property and heat preservation property.

Description

technical field [0001] The invention relates to a flame-retardant coating for titanium-chromium alloy lost foam casting, which belongs to the technical field of metal casting coatings. Background technique [0002] In the prior art, in order to ensure good surface quality of castings and prevent voids or oxidized wrinkles on the surface of castings, it is the key to improve the quality of magnesium alloy castings to prevent magnesium alloys from burning in the mold during casting. For example, the patent application number is CN02110682.7, a magnesium alloy lost foam casting flame-retardant coating and its preparation method introduced in the publication specification of the invention patent application. The coating composition is 30-50% of magnesia powder, 20-40% of pearl powder, mica powder 15-30%, silica sol 3-9%, white latex 1-5%, polyacrylamide 0.1-0.8%, carboxymethyl cellulose sodium 0.1-0.8%, adsorbent 1-6%, flame retardant 0.3- 2%. When preparing, the adsorbent, so...

AI Technical Summary

Problems solved by technology

But the coating has poor adhesion and unsatisfactory coating effect