CN109834226A

CN109834226A - A kind of alloy casting composite core and preparation method thereof

Info

Publication number: CN109834226A
Application number: CN201711194676.9A
Authority: CN
Inventors: 李程; 徐运福
Original assignee: CHENGDU XINGYU PRECISION CASTING Co Ltd
Current assignee: CHENGDU XINGYU PRECISION CASTING Co Ltd
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2019-06-04

Abstract

The present invention provides a kind of alloy casting composite core and preparation method thereof, comprising: outer shape layer and inner core；The outer shape layer wraps up inner core, and the core is whole for enhanced type core；The outer shape layer and inner core are cylindricality；The raw material of the outer shape layer includes: gypsum, water soluble salt, silica, bauxite, quartz glass, glass fibre, silica solution；The raw material of the inner core includes: bauxite, the iron wire that diameter is 31mm；A kind of preparation method of alloy casting composite core includes: to carry out the raw material mixing of outer shape layer and inner core respectively, and mixed outer shape layer raw material is uniformly inserted five steps such as the female die of core mold, tamping；The material of main part of composite core production of the invention is bauxite sand, and the cost of material is low, and manufacturing process is simpler, carries out hand moulding using wooden model or aluminum die, cost of manufacture and difficulty are influenced small, type core high yield rate by type core size.

Description

A kind of alloy casting composite core and preparation method thereof

Technical field

The present invention relates to alloy casting technology fields, and in particular to a kind of alloy casting composite core and its preparation side Method.

Background technique

With the rapid development in the fields such as Aeronautics and Astronautics, naval vessel, weapons, petrochemical industry, for the titanium and titanium of complex-shaped surface mould Alloy-steel casting demand is also more and more.Currently, titanium alloy casting complex-shaped surface mould mainly by the method for Y2O3 ceramic core come Molding, but type core preparation cost is high.

Patent CN102989994A proposes a kind of Ti alloy casting composite core preparation method of low cost, the patent Type core blank by mass percent be 35%~44.7% mullite powder, 43%~54.7%A2O3,0.1%~0.3%CaO and 5%~12% silica solution is prepared, using the standby type core blank intensity difference of the patent system, especially the type core of slim-lined construction, The thermal shock resistance properties of frangibility or cracking during the preparation process, high rejection rate, type core melts of titanium alloy resistant to high temperatures is poor, and after casting The removing of type core is difficult, limits the popularization of titanium or titanium alloy casting low-cost type core.

Summary of the invention

The invention provides the following technical scheme: a kind of alloy casting composite core and preparation method thereof, comprising: external shape Shape layer and inner core；The outer shape layer wraps up inner core, and the core is whole for enhanced type core；The external shape Shape layer and inner core are cylindricality；The raw material of the outer shape layer includes: gypsum, water soluble salt, silica, bauxite, stone English glass, glass fibre, silica solution；The raw material of the inner core includes: bauxite, the iron wire that diameter is 31mm.

Further, the raw material of the outer shape layer includes: 60-85 mass parts gypsum, 16-25 mass parts in mass ratio Water soluble salt, 10-30 mass parts silica, 10-20 mass parts bauxite, 5-10 mass parts quartz glass, 5-10 mass parts glass Fiber, 5-10 mass parts silica solution；The raw material of the inner core includes: 80-90 mass parts bauxite, 10-20 in mass ratio Mass parts diameter is the iron wire of 31mm.

A kind of alloy casting preparation method of composite core, include the following steps: (1) carry out respectively outer shape layer and The raw material of inner core mixes, and mixed outer shape layer raw material is uniformly inserted to female die, the tamping of core mold； (2) mixed inner core raw material is filled at the center of female die, the upper mold section of core mold is covered after tamping；(3) again will The raw material of mixed outer shape layer fills up inner space and the tamping of core mold, is removed from the molds after core hardening, And 0.5-1h is dried under the conditions of 80-100 DEG C, then dry 2-3h under the conditions of 300 DEG C；(4) with infiltration or brush after core baking Coating is formed on its surface the film that discharges water；(5) natural air drying or at 100 DEG C it is obtained by drying.

The beneficial effects of the present invention are: the material of main part that composite core of the invention makes is bauxite sand, material cost Low, manufacturing process is simpler, carries out hand moulding using wooden model or aluminum die, cost of manufacture and difficulty are influenced by type core size It is small, type core high yield rate.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of alloy casting composite core in the embodiment of the present invention.

Wherein, 1, outer shape layer；2, inner core.

Specific embodiment

A specific embodiment of the invention is described in detail with reference to the accompanying drawing:

Embodiment 1:

The present invention provides a kind of alloy casting composite core and preparation method thereof, comprising: outer shape layer and inner core Portion；The outer shape layer wraps up inner core, and the core is whole for enhanced type core；The outer shape layer and inner core Portion is cylindricality；The raw material of the outer shape layer includes: 60 mass parts gypsum, 16 mass of water-soluble salt, 10 in mass ratio Mass parts silica, 10 mass parts bauxites, 5 mass parts quartz glass, 5 mass parts glass fibres, 5 mass parts silica solution；It is described The raw material of inner core includes: 80 mass parts bauxites, the iron wire that 10 mass parts diameters are 31mm in mass ratio.

A kind of alloy casting preparation method of composite core, include the following steps: (1) carry out respectively outer shape layer and The raw material of inner core mixes, and mixed outer shape layer raw material is uniformly inserted to female die, the tamping of core mold； (2) mixed inner core raw material is filled at the center of female die, the upper mold section of core mold is covered after tamping；(3) again will The raw material of mixed outer shape layer fills up inner space and the tamping of core mold, is removed from the molds after core hardening, And 0.5h is dried under the conditions of 80 DEG C, then dry 2h under the conditions of 300 DEG C；(4) use infiltration or spread coating at it after core baking Surface forms the film that discharges water；(5) natural air drying to obtain the final product.

Embodiment 2:

A kind of alloy casting composite core and preparation method thereof, comprising:: outer shape layer and inner core；It is described outer Portion's shape layers wrap up inner core, and the core is whole for enhanced type core；The outer shape layer and inner core are column Shape；The raw material of the outer shape layer includes: 85 mass parts gypsum, 25 mass of water-soluble salt, 30 mass parts silicon in mass ratio Stone, 20 mass parts bauxites, 10 mass parts quartz glass, 10 mass parts glass fibres, 10 mass parts silica solution；The inner core The raw material in portion includes: 90 mass parts bauxites, the iron wire that 20 mass parts diameters are 31mm in mass ratio.

A kind of alloy casting preparation method of composite core, include the following steps: (1) carry out respectively outer shape layer and The raw material of inner core mixes, and mixed outer shape layer raw material is uniformly inserted to female die, the tamping of core mold； (2) mixed inner core raw material is filled at the center of female die, the upper mold section of core mold is covered after tamping；(3) again will The raw material of mixed outer shape layer fills up inner space and the tamping of core mold, is removed from the molds after core hardening, And 1h is dried under the conditions of 100 DEG C, then dry 3h under the conditions of 300 DEG C；(4) use infiltration or spread coating in its table after core baking Face forms the film that discharges water；(5) obtained by drying under the conditions of 100 DEG C.

The present invention is not limited to examples detailed above, in claims of the present invention limited range, art technology The various deformations or amendments that personnel can make without creative work are protected by this patent.

Claims

1. a kind of alloy casting composite core characterized by comprising outer shape layer and inner core；The external shape Shape layer wraps up inner core, and the core is whole for enhanced type core；The outer shape layer and inner core are cylindricality；Institute The raw material for stating outer shape layer includes: gypsum, water soluble salt, silica, bauxite, quartz glass, glass fibre, silica solution；Institute The raw material for stating inner core includes: bauxite, the iron wire that diameter is 31mm.

2. a kind of alloy casting composite core according to claim 1, which is characterized in that the outer shape layer Raw material in mass ratio include: 60-85 mass parts gypsum, 16-25 mass of water-soluble salt, 10-30 mass parts silica, 10-20 Mass parts bauxite, 5-10 mass parts quartz glass, 5-10 mass parts glass fibre, 5-10 mass parts silica solution；The inside The raw material of core includes: 80-90 mass parts bauxite, the iron wire that 10-20 mass parts diameter is 31mm in mass ratio.

3. the preparation method that composite core is used in a kind of alloy casting according to claims 1 and 2, which is characterized in that including Following steps: (1) carrying out the raw material mixing of outer shape layer and inner core respectively, and by mixed outer shape layer raw material The uniformly female die of filling core mold, tamping；(2) mixed inner core raw material, tamping are filled at the center of female die The upper mold section of core mold is covered afterwards；(3) raw material of mixed outer shape layer is filled up to the inner space of core mold again And consolidate, it is removed from the molds after core hardening, and 0.5-1h is dried under the conditions of 80-100 DEG C, then dried under the conditions of 300 DEG C Dry 2-3h；(4) film that discharges water is formed on its surface with infiltration or spread coating after core baking；(5) it natural air drying or is dried at 100 DEG C It does to obtain the final product.