Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lost foam casting method for alloy casting

A technology of lost foam casting and alloy castings, which is applied in the field of alloy castings. It can solve the problems of poor surface quality of castings, scrapped machined surfaces, iron-clad sand, etc., and achieve the effects of enhancing strength, reducing internal stress generation, and reducing production costs.

Inactive Publication Date: 2018-02-16
界首市华腾金属铸造有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the free carbon generated after burning polystyrene accumulates in the casting or on the surface of the casting to form carbon deposits, causing the machined surface to be scrapped due to carbon deposit defects.
In addition, it is easy to produce defects such as iron-clad sand, box expansion, deformation, etc., and the surface quality of castings is relatively poor compared to wood casting

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for lost foam casting alloy castings, comprising the following steps:

[0024] (1) Alloy smelting: Mix the components of the high-silicon-nickel-copper alloy according to a certain ratio, melt and cast it into a master alloy ingot in a vacuum induction furnace, and then refine it at 1500°C for 8 minutes to obtain an alloy melt; the high-silicon-nickel-copper alloy is made of the following weight Proportional composition: Cu 35%, Fe 2.6%, Si 4.3%, Mn 0.9%, C 0.15%, and the balance is Ni.

[0025] (2) Model manufacturing: cutting, grinding and bonding the whole piece of foam, and then combining foam models similar in size and shape to the castings into model clusters.

[0026] (3) Coating: Adjust the coating density to 65 Baume degrees, stir evenly and apply on the foam model. After 3 layers, dry and cure at 56°C for 2.5 hours; the coating includes the following raw materials in parts by weight: 46 parts of epoxy resin, 15 parts of polyamide, 18 parts of sodium ...

Embodiment 2

[0032] A method for lost foam casting alloy castings, comprising the following steps:

[0033] (1) Alloy smelting: Mix the components of the high-silicon-nickel-copper alloy according to a certain ratio, melt and cast it into a master alloy ingot in a vacuum induction furnace, and then refine it at 1500°C for 6 minutes to obtain an alloy melt; the high-silicon-nickel-copper alloy is made of the following weight Proportional composition: Cu 36%, Fe 3.2%, Si 4.2%, Mn 0.8%, C 0.15%, the balance being Ni.

[0034] (2) Model manufacturing: cutting, grinding and bonding the whole piece of foam, and then combining foam models similar in size and shape to the castings into model clusters.

[0035] (3) Coating: adjust the coating density to 62 Baume degrees, stir evenly and apply it on the foam model. After 5 layers, dry and cure at 60°C for 2.6 hours; the coating includes the following raw materials in parts by weight: 50 parts of epoxy resin, 16 parts of polyamide, 22 parts of sodiu...

Embodiment 3

[0041] A method for lost foam casting alloy castings, comprising the following steps:

[0042] (1) Alloy smelting: Mix the components of the high-silicon-nickel-copper alloy according to a certain ratio, melt and cast it into a master alloy ingot in a vacuum induction furnace, and then refine it at 1520°C for 5 minutes to obtain an alloy melt; the high-silicon-nickel-copper alloy is made of the following weight Proportional composition: Cu 38%, Fe 3.3%, Si 4.5%, Mn 1.2%, C 0.16%, and the balance is Ni.

[0043] (2) Model manufacturing: cutting, grinding and bonding the whole piece of foam, and then combining foam models similar in size and shape to the castings into model clusters.

[0044] (3) Coating: adjust the coating density to 70 Baume degrees, stir evenly and apply it on the foam model. After 5 layers, dry and cure at 60°C for 3 hours; the coating includes the following raw materials in parts by weight: 60 parts of oxygen resin, 20 parts of polyamide, 25 parts of sodiu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a lost foam casting method for an alloy casting, and relates to the technical field of alloy casting. The lost foam casting method for the alloy casting comprises alloy smelting, model manufacturing, overlay coating, encasing, casting, thermal treatment and repair welding and polishing. The lost foam casting method is reasonable in process design, prevents free carbon generated after foam model gasification from being accumulated inside the casting or on the surface of the casting to form accumulated carbon, avoids a processed surface from being scrapped as a result ofcarbon accumulating defects, reduces production cost, is high in quality, and is suitable for large-scale production.

Description

Technical field: [0001] The invention relates to the technical field of alloy casting, in particular to a method for lost foam casting alloy castings. Background technique: [0002] Traditional casting models have high production costs, waste of natural resources, and long processing cycles. At present, models made of paraffin or foamed polyethylene are directly buried in dry quartz sand and vibrated to form a solid sand mold of benzene plate. When molten iron is poured into this solid mold, the polystyrene burns and gasifies, and the molten iron is filled. The space occupied by polystyrene, which solidifies and cools to form a casting identical to the model. It is usually called lost foam casting, also known as dry sand full mold negative pressure casting, and it is called EPC abroad. It is one of the most advanced casting processes in the world. [0003] Compared with traditional casting technology, lost foam casting technology has unparalleled advantages. Lost foam cast...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03B22C9/04B22C3/00C22F1/10
CPCC22C19/03B22C3/00B22C9/04C22F1/10
Inventor 申毛毛宋颂丁艳丽李向敏崔涛刘群林吕沅蔚
Owner 界首市华腾金属铸造有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com