Highly tenacious soluble composite material salt core and production method

A composite material, soluble technology, applied in the direction of cleaning/processing machinery, cores, manufacturing tools, etc. of casting materials, can solve the problems of low strength, poor plasticity, poor dimensional stability, etc. Good dimensional stability

Inactive Publication Date: 2008-09-24
XIAN KANGBO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of low strength, poor plasticity, and poor dimensional stability of traditional salt cores in the prior art, and to provide a high-strength, high-plasticity, good dimensional stability, excellent surface quality and machinable High strength and toughness soluble composite material salt core and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Adopt the present invention to prepare composite material salt core, it is composed of: 65% water-soluble metal salt (NaCl), 15% binding agent (bentonite), 10% oxide fiber and 10% metal compound salt whisker . The particle size of the metal salt is 120 mesh, the binder is bentonite, the particle size is 180 mesh, and the fiber is domestic commercially available Al 2 o 3 The fibers and whiskers are domestic commercially available aluminum borate whiskers. Its preparation method is:

[0021] a. Drying: place the metal salt, binder, oxide fiber and metal compound salt whisker in a box-type furnace for heating at 200°C for 2.5 hours;

[0022] b. Grinding and sub-sieving: Pour the dried raw materials into the mill and grind for 4 minutes respectively, sieve the metal salt with a 120-mesh stainless steel screen, and sieve the binder with a 180-mesh stainless steel screen;

[0023] c. Ingredients: weigh the ratio of raw materials after sieving, pour into the mixer and stir...

Embodiment 2

[0028] The preparation method is the same as in Example 1, and the batching ratio of the salt core is: 70% water-soluble metal salt (CaCl 2 ), 10% binder (clay), 10% oxide fibers and 10% metal complex salt whiskers. The particle size of the metal salt is 120 mesh, the binder is bentonite, the particle size is 180 mesh, and the fiber is domestic commercially available Al 2 o 3 The fibers and whiskers are domestic commercially available aluminum borate whiskers.

Embodiment 3

[0030] The preparation method is the same as that in Example 1, and the batching ratio of the salt core is: 60% water-soluble metal salt (NaCl), 10% binder (clay), 15% oxide fiber and 15% metal composite salt crystal beard. The particle size of the metal salt is 120 mesh, the binder is bentonite, the particle size is 180 mesh, and the fiber is domestic commercially available A1 2 o 3 The fibers and whiskers are domestic commercially available aluminum borate whiskers.

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Abstract

The invention provides a high-strength soluble composite material salt core and a preparation method thereof. The salt core is made from soluble metal salt crystal, binder, oxide fiber and metal composite salt; and the preparation method is as follows: the metal salt, the binder, the fiber and the salt crystal are evenly mixed in proportion and then arranged into a die for pressing into salt core blank, then the salt core blank is arranged into a furnace for braking, the salt core after cooling is processed mechanically according to a concrete size, at last, the processed salt core is packaged. The high-strength soluble composite material salt core provided by the invention can bear no more than 200 MPa metal liquid pressure, and can be used for making complex cavities of components by squeezing forging, low pressure forging and metal forging.

Description

technical field [0001] The invention relates to a high-power supercharged engine piston salt core and a preparation method thereof, in particular to a high-strength soluble composite material salt core and a preparation method thereof. Background technique [0002] With the development of variable turbocharging technology and high-pressure common rail direct injection technology, users have put forward higher and higher requirements for diesel engine power per liter, compact structure, complex shape of castings and heat load, and the importance of diesel engines The materials and manufacturing technology of parts also put forward new and higher requirements. In order to improve the organization and performance of critical parts of diesel engines, optimizing the material design, structural design and manufacturing process of parts is the only choice. Among them, optimizing material design is the main research direction of critical parts of diesel engines in the past 20 years,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C5/00B22C9/10
Inventor 李建平杨忠郭永春李艳
Owner XIAN KANGBO NEW MATERIAL TECH
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