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

Centrifugal casting radiant tube paint and preparation method thereof

A technology of centrifugal casting and radiant tube, which is used in casting molding equipment, coatings, casting molds, etc., can solve the problems of unsuitable centrifugal casting radiant tube, bronchial asthma, severe irritation and edema, etc., and achieve significant economic and social benefits. , the effect of increasing the surface area and improving the mechanical properties

Active Publication Date: 2009-08-12
靖江市黎明铸造材料厂
View PDF5 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to obtain evenly distributed pockmarks on the outer surface of the tube when it is used for centrifugal casting of radiant tubes
Japanese patent JP54019420-A also discloses a coating for centrifugally cast steel (or nickel-base alloy) pipes, which contains B 4 C, it is easy to form a layer of boron-containing hardened layer on the surface of the cast tube, which is beneficial to improve the wear resistance of the cast tube surface, but it is not easy to obtain uniformly distributed pockmarks on the outer surface of the tube when used for centrifugal casting radiant tubes
Invention patent RO95387-A also discloses a refractory coating for centrifugal steel casting, containing 1.5-5% bentonite, 0.3-1.5% starch, 2-5% water glass, 0.1-0.2% phenol or formaldehyde solution, but the human body After inhaling phenol, it will cause dyspnea and headache, and it will irritate the eyes, and formaldehyde is also a protoplasmic poison, which can be combined with protein. Bronchial asthma occurs, because the paint is harmful to the body, it should not be used in the production of centrifugal casting radiant tubes

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

[0031] Adopt following processing step to prepare coating of the present invention:

[0032] 1) First mix 200-280 mesh sodium bentonite, 200-280 mesh diatomite (including SiO 2 >90%, Al 2 o 3 2 o 3 2 O2 O2 >70%, SiO 2 2 2 o 3 2 o 3 <0.3%), 200-280 mesh titanium powder and 200-280 mesh iron powder are added to the wheel mill according to the ratio in Table 1, and dry mixed for 25 minutes;

[0033] 2) Then add sodium alginate, sodium dodecylbenzenesulfonate, silane, polyvinyl alcohol and water in sequence according to the ratio in Table 1, and mix and grind for 240 minutes;

[0034] 3) Then according to the ratio in Table 1, add silica sol and mix for 40 minutes;

[0035] 4) Finally, sieve the mixed and milled paint through a 100-mesh sieve to remove impurities, and then obtain the centrifugal casting radiant tube paint.

[0036] Table 1 Composition of paint (mass fraction, %)

[0037] raw material diatomite Zircon powder Titanium powder iron powder S...

Embodiment 2

[0039] Adopt following processing step to prepare coating of the present invention:

[0040] The preparation method of coating of the present invention is as follows:

[0041] 1) First mix 200-280 mesh sodium bentonite, 200-280 mesh diatomite (including SiO 2 >90%, Al 2 o 3 2 o 3 2 O2 O2 >70%, SiO 2 2 2 o 3 2 o 3 <0.3%), 200-280 mesh titanium powder and 200-280 mesh iron powder are added to the wheel mill according to the ratio in Table 2, and dry mixed for 15 minutes;

[0042] 2) Then add sodium alginate, sodium dodecylbenzenesulfonate, silane, polyvinyl alcohol and water in sequence according to the ratio in Table 2, and mix and grind for 180 minutes;

[0043] 3) Then according to the ratio in Table 2, add silica sol and mix for 30 minutes;

[0044] 4) Finally, sieve the mixed and milled paint through an 80-mesh sieve to remove impurities, and then obtain the centrifugal casting radiant tube paint.

[0045] The composition of table 2 coating (mass fraction, %)

[0...

Embodiment 3

[0048] Adopt following processing step to prepare coating of the present invention:

[0049] 1) First mix 200-280 mesh sodium bentonite, 200-280 mesh diatomite (including SiO 2 >90%, Al 2 o 3 2 o 3 2 O2 O2 >70%, SiO 2 2 2 o 3 2 o 3 <0.3%), 200-280 mesh titanium powder and 200-280 mesh iron powder are added to the wheel mill according to the ratio in Table 3, and dry mixed for 20 minutes;

[0050] 2) Then add sodium alginate, sodium dodecylbenzenesulfonate, silane, polyvinyl alcohol and water in sequence according to the ratio in Table 3, and mix and grind for 210 minutes;

[0051] 3) Then according to the ratio in Table 3, add silica sol and mix for 35 minutes;

[0052] 4) Finally, sieve the mixed and milled paint through a 90-mesh sieve to remove impurities, and then obtain the centrifugal casting radiant tube paint.

[0053] The composition of table 3 coating (mass fraction, %)

[0054] raw material diatomite Zircon powder Titanium powder iron powde...

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

PropertyMeasurementUnit
heightaaaaaaaaaa
thicknessaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention is a centrifugal casting radiant tube coating and a preparation method thereof, the coating comprises the ingredients (mass percent) of: 25-30% of diatomite of, 5-10% of zircon powder, 1.0-1.2% of titanium powder, 1.5-1.8% of iron powder, 4.5-5.0% of sodium bentonite, 2.0-2.5% of polyvinyl alcohol, 0.8-1.0% of sodium alginate, 3.5-4.0% of silica sol, 0.8-1.0% of sodium dodecylbenzene sulfonate, 0.05-0.08% of silane and 46.82-49.95% of water, wherein, the mass percent of the diatomite and the zircon powder is not less than 35% and not more than 37%, the mass percent of the titanium powder and the iron powder is not less than 2.7% and not more than 2.9%, and the mass percent of the sodium bentonite plus the polyvinyl alcohol plus the sodium alginate is not less than 8.0% and not more than 8.2%. The inventive coating is used for the centrifugal casting radiant tube after dry-blending, mixed grinding and sieving, uniformly distributed bulges (namely pitting surface) can be formed on the outer surface of the radiant tube to improve heat efficiency of the radiant tube. The inventive coating also has excellent adhesive force, high temperature strength and crack resistance, thus reducing defects on the surface of the radiant tube and improving quality of complex tube. Using the inventive coating to cast the radiant tube can result in remarkable economical benefit.

Description

technical field [0001] The invention relates to various centrifugal casting alloy steel pipe coatings and a preparation method thereof, in particular to a centrifugal casting radiant tube coating and a preparation method thereof, belonging to the field of casting technology. Background technique [0002] In the heat treatment industry of mechanical processing, automobile manufacturing and steel industry, in order to ensure the internal quality of the workpiece and meet the requirements of certain surface heat treatment processes, many heat treatment furnaces use indirect heating with a protective atmosphere. Since the radiant tube heating effectively avoids oxidation and decarburization of the heated surface, it creates conditions for heat treatment under a protective atmosphere. At present, radiant tubes are widely used and developed rapidly. Radiant tubes generally have two types of electric heating and gas heating. The method of radiant tube heating has many advantages ...

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): B22C3/00B22D13/10
Inventor 顾其荣姚萍符寒光
Owner 靖江市黎明铸造材料厂
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