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Casting method for casting thin-walled investment casting steel parts

A casting molding and investment casting technology is applied in the casting field of thin-walled investment steel castings.

Active Publication Date: 2015-11-25
JIASHAN SINHAI PRECISION CASTING
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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 solve the deficiencies of the prior art and provide a thin-walled investment casting casting method that can avoid casting shrinkage, loosening or casting deformation, and can also reduce production costs.

Method used

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  • Casting method for casting thin-walled investment casting steel parts
  • Casting method for casting thin-walled investment casting steel parts
  • Casting method for casting thin-walled investment casting steel parts

Examples

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Embodiment 1

[0030] Such as figure 2 , image 3 , Figure 4 with Figure 5 As shown, the casting method of the thin-walled investment casting steel casting provided by the present embodiment includes the following steps:

[0031] a. First prepare a plurality of straight iron wires with a diameter of 0.5mm and a length of 50mm, and apply a layer of wax with a thickness of 0.1mm on the outer surface of the straight iron wires;

[0032] b. Then insert the straight iron wire in the previous step into the wax mold group 3 after the tree is assembled, and the insertion depth is 4mm;

[0033] c. Then dip the straight iron wire in the previous step with the wax mold group 3 into paint slurry and coat hanging sand;

[0034] d. After forming the mold shell 4 on the surface of the wax mold group 3, first destroy part of the mold shell 4 on the surface of the other end of the straight iron wire, extract the straight iron wire, and then dewax and roast;

[0035] e. When pouring molten steel at th...

Embodiment 2

[0037] Such as Image 6 , Figure 7 , Figure 8 with Figure 9 As mentioned above, the thin-walled investment casting casting method provided by this embodiment includes the following steps:

[0038] a. First, prepare multiple hard plastic wires with a diameter of 1mm and a length of 100mm. The bending strength of the above-mentioned hard plastic wires is greater than 15Mpa, and the gasification temperature of burning loss is lower than 800°C;

[0039] b. Then glue one end of the hard plastic line in the previous step to the wax mold group 3 after the tree has been assembled, and the bonding length is 6mm;

[0040] c. Then dip the hard plastic wire in the previous step with the wax mold set 3 and paint the coating slurry and hang sand;

[0041] d. After the mold shell 4 is formed on the surface of the wax mold group 3, dewaxing and roasting are carried out, and the hard plastic line is burned to form a cavity 5 on the mold shell 4;

[0042] e. When pouring the molten stee...

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Abstract

The invention discloses a casting method for pouring and molding a thin-wall investment pattern steel casting, aiming to prevent the casting from cavity-shrinking, loosening or deforming. The method comprises the following steps: a. first preparing multiple wire-shaped metal materials with diameter of 0.5-1mm and length of 50-100mm and coating the outer surface of each wire-shaped metal material with a layer of wax with thickness of 0.1-0.2mm; b. inserting the wire-shaped metal materials from the last step into an assembled wax module, wherein the inserting thickness is 4-8mm; c. coating and smearing the wire-shaped metal materials with slurry and sands together with the wax module; d. after forming a module shell on the surface of the wax module, firstly destroying parts of module shell on the surface of the other end of the wire-shaped metal materials, drawing out the wire-shaped metal materials, and then performing dewaxing and roasting; e. finally pouring molten steel, wherein cavities which are formed in the module shell after the wire-shaped metal materials are drawn out can be used for drainage. By virtue of the method, the pass percent of the castings is enhanced.

Description

technical field [0001] The invention relates to a casting method, in particular to a casting method for pouring thin-walled investment cast steel pieces. Background technique [0002] Due to its high mechanical performance and low price, steel castings are widely used in aviation, aerospace, shipbuilding, electronics, hardware, pump valves and other fields; however, due to their large specific gravity, the specific gravity is 7.8 g / cm3 Parts or equipment are heavy, or even overweight, which restricts the efficacy of parts and equipment to a certain extent. Therefore, in the structural design of steel castings, without affecting the mechanical properties, it is gradually developed to be thin-walled and light-weight, so as to reduce the weight of parts or equipment and improve their efficacy. [0003] However, due to the inherent casting characteristics of steel castings, thin-walled castings are not easy to cast, especially products with a wall thickness of less than 2mm, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04
Inventor 吴金海
Owner JIASHAN SINHAI PRECISION CASTING
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