A kind of preparation method of coated zirconium sand sand mold for titanium alloy casting

A titanium alloy and sand mold technology, which is applied in casting molding equipment, molds, mold components, etc., can solve problems such as limiting the application of coated sand molds, and achieve the effects of improving production efficiency, reducing production costs, and good mechanical properties.

Active Publication Date: 2018-02-09
LIYANG XINLI MASCH CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high chemical activity of molten titanium, it is very easy to react with conventional casting materials during casting, resulting in a series of casting defects such as thick oxide layer, sticky sand, surface inclusions and pores on the surface of titanium castings. Limit the application of coated sand mold (core) in titanium alloy casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 300g of zirconium silicate, put it into a pulverizer and pulverize it, place the pulverized zirconium silicate powder on a vibrating sieve machine, and screen out zirconium silicate with a particle size of 90 μm and 106 μm. According to the mass ratio of 2:3, mix evenly to get the surface zirconium silicate; weigh 200g of the above surface zirconium silicate, heat to 190°C, keep the temperature for 30min, pour it into the sand mixer and stir at 120r / min for 20s, Add 20mL of 10% silane coupling agent KH-550 aqueous solution, cool down to 130°C, add 5g of thermoplastic phenolic resin passed through a 120 mesh sieve, keep stirring for 60s, cool down to 120°C, add 2g of calcium stearate, and keep stirring 60s, cool down to 90°C, add 60mL of 50% hexamethylenetetramine aqueous solution, continue to stir for 40s, cool down to 80°C, take out the coated zirconium silicate, lay flat to dry, transfer to 60°C for blast drying Dry it in the box for 4 hours, put it into ...

example 2

[0020]First, weigh 400g of zirconium silicate, put it into a pulverizer and pulverize it, place the pulverized zirconium silicate powder on a vibrating sieve machine, and screen out zirconium silicate with a particle size of 98 μm and 115 μm. According to the mass ratio of 2:3, mix evenly to get the surface zirconium silicate; weigh 250g of the above surface zirconium silicate, heat to 195°C, keep the temperature for 35min, pour it into the sand mixer and stir at 160r / min for 25s, Add 25mL of 10% silane coupling agent KH-550 aqueous solution, cool down to 133°C, add 7g of thermoplastic phenolic resin passed through a 120 mesh sieve, keep stirring for 80s, cool down to 123°C, add 3g of calcium stearate, and keep stirring 70s, cool down to 93°C, add 80mL of 50% hexamethylenetetramine aqueous solution, continue to stir for 60s, cool down to 83°C, take out the film-coated zirconium silicate, lay it flat to dry, and transfer to 65°C for blast drying Dry in the oven for 4.5 hours, a...

example 3

[0023] First, weigh 500g of zirconium silicate, put it into a pulverizer and pulverize it, place the pulverized zirconium silicate powder on a vibrating sieve machine to sieve, and screen out zirconium silicate with a particle size of 106 μm and 125 μm. According to the mass ratio of 2:3, mix evenly to get the surface zirconium silicate; weigh 300g of the above surface zirconium silicate, heat to 200°C, keep the temperature for 40min, pour it into the sand mixer and stir at 200r / min for 30s, Add 30mL of 10% silane coupling agent KH-550 aqueous solution, cool down to 135°C, add 8g of thermoplastic phenolic resin passed through a 120 mesh sieve, keep stirring for 100s, cool down to 125°C, add 4g of calcium stearate, and keep stirring For 80s, cool down to 95°C, add 90mL of 50% hexamethylenetetramine aqueous solution, continue to stir for 80s, cool down to 85°C, take out the coated zirconium silicate, lay flat to dry, and transfer to 70°C for blast drying Dry in the box for 5 hou...

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Abstract

The invention discloses a preparation method of a precoated zirconium sand model for titanium alloy casting, and belongs to the technical field of casting. Firstly, zirconium silicate is taken, crushed and sieved for screening to obtain surface layer zirconium silicate mixed by powder with two particle sizes; and a coupling agent, resins, hexamine and the like are added for mixing, are dried and crushed, are mixed with yttrium oxide, are put in a sand mold forming machine for baking, standing and air drying, are infiltrated in yttrium sol, are sprayed with yttrium oxide and yttrium sol mixed liquid, and are roasted to obtain the precoated zirconium sand model for titanium alloy casting. The zirconium silicate is used as the raw materials, is stable in chemical property, resists high temperature, is infiltrated and sprayed with a layer of yttrium oxide on the surface to make up the defect of easy generation of the interface reaction with a zirconium casting material in casting forming due to higher chemical activity of traditional molten titanium, and is better in mechanical performance and higher in production value.

Description

technical field [0001] The invention discloses a method for preparing a film-coated zircon sand mold for titanium alloy casting, which belongs to the technical field of casting. Background technique [0002] With the increasing globalization of economic competition, the development and application of new materials in the fields of aviation, military, electronics and automobile industries has developed rapidly, and at the same time, higher requirements and challenges have been put forward for material properties and manufacturing processes. As the focus of attention in the field of modern advanced manufacturing technology, rapid prototyping technology has opened up complex The new approach to parts and rapid tooling manufacturing has broad application prospects and will surely become a new driving force to promote the research of advanced materials and the development of the casting mold industry. [0003] The traditional method of preparing coated sand molds often divides t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02B22C1/00
CPCB22C1/00B22C9/02
Inventor 陈信华吴鹏李恒宇
Owner LIYANG XINLI MASCH CASTING CO LTD
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