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

Preparation process of high-quality diesel engine bearing cover

A diesel engine and preparation technology, applied in the field of cast iron, can solve the problem of low nodularity grade

Active Publication Date: 2022-01-14
JIANGYIN HONGCHUANG CASTING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The engine bearing cover is one of the products of ductile iron. The function of the bearing cover is to protect the interior from being polluted by external dust and prevent the internal oil from overflowing. The internal vulnerable parts are not damaged, which requires the bearing cover to have good mechanical properties such as tensile strength, plasticity, and wear resistance. The nodularity rate of ductile iron is the factor that determines these key properties. With the progress of life, People's requirements for bearing caps are also increasing day by day. At present, the bearing caps made of nodular cast iron on the market also have a large part of the situation that the nodularity rate is not high. Based on this, the invention discloses a cast iron with high nodularity rate. technology to solve the above problems

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation process of high-quality diesel engine bearing cover
  • Preparation process of high-quality diesel engine bearing cover
  • Preparation process of high-quality diesel engine bearing cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A preparation process for a high-quality diesel engine bearing cover, comprising the following steps:

[0060] S1: Put the raw material in the melting furnace, melt it into molten iron at high temperature, and add silicon carbide once to obtain the original molten iron;

[0061] S2: Place small scrap iron 1, dry iron filings 2, primary inoculant 3, and nodulizer 4 in the nodular iron bag in sequence, and compact them;

[0062] S3: Pour the original molten iron into the ductile iron ladle, spheroidize and incubate for a period of time, add secondary silicon carbide and secondary inoculant to obtain ductile iron;

[0063] S4: Pouring spherical graphite molten iron into the bearing cap mold to obtain the original casting of the bearing cap;

[0064] S5: The original casting of the bearing cap is subjected to heat treatment to obtain the engine bearing cap.

[0065] Among them, S1:

[0066] Put the cast iron raw material in a melting furnace, heat it to 1580°C, melt all ...

Embodiment 2

[0089] A preparation process for a high-quality diesel engine bearing cover, comprising the following steps:

[0090] S1: Put the raw material in the melting furnace, melt it into molten iron at high temperature, and add silicon carbide once to obtain the original molten iron;

[0091] S2: Place small scrap iron 1, dry iron filings 2, primary inoculant 3, and nodulizer 4 in the nodular iron bag in sequence, and compact them;

[0092] S3: Pour the original molten iron into the ductile iron ladle, spheroidize and incubate for a period of time, add secondary silicon carbide and secondary inoculant to obtain ductile iron;

[0093] S4: Pouring spherical graphite molten iron into the bearing cap mold to obtain the original casting of the bearing cap;

[0094] S5: The original casting of the bearing cap is subjected to heat treatment to obtain the engine bearing cap.

[0095] Among them, S1:

[0096] Place the cast iron raw material in a melting furnace, heat it to 1590°C, melt al...

Embodiment 3

[0119] A preparation process for a high-quality diesel engine bearing cover, comprising the following steps:

[0120] S1: Put the raw material in the melting furnace, melt it into molten iron at high temperature, and add silicon carbide once to obtain the original molten iron;

[0121] S2: Place small scrap iron 1, dry iron filings 2, primary inoculant 3, and nodulizer 4 in the nodular iron bag in sequence, and compact them;

[0122] S3: Pour the original molten iron into the ductile iron ladle, spheroidize and incubate for a period of time, add secondary silicon carbide and secondary inoculant to obtain ductile iron;

[0123] S4: Pouring spherical graphite molten iron into the bearing cap mold to obtain the original casting of the bearing cap;

[0124] S5: The original casting of the bearing cap is subjected to heat treatment to obtain the engine bearing cap.

[0125] Among them, S1:

[0126] Put the cast iron raw material in a melting furnace, heat it to 1600°C, melt all ...

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 preparation process of a high-quality diesel engine bearing cover. After spheroidizing and inoculating treatment are performed on base iron for a period of time, secondary silicon carbide and a secondary inoculant are added; the purity of the secondary silicon carbide is limited to be 95 percent or above; graphitization is promoted in the base iron through rare earth metal lanthanum and magnesium in a spheroidizing agent and a silicon-barium inoculant, and graphite nucleation is formed; silicon carbide with the purity being 95 percent or above is added; the dendritic crystals of austenite in the molten iron can be micronized; the micronized austenite dendritic crystals can increase graphite cores formed among the dendritic crystals; and the number of graphite nodules in the molten iron is increased, and the spheroidization rate is increased. The engine bearing cover prepared by the preparation process is processed by using a proper formula and adjusting the element proportion, and the bearing cover with good spheroidization rate and mechanical property is obtained by adopting a processing technology of secondarily adding silicon carbide and the inoculant, so that the engine bearing cover has good practicability and production value.

Description

technical field [0001] The invention relates to the technical field of cast iron, in particular to a preparation process of a high-quality diesel engine bearing cover. Background technique [0002] Ductile iron is a cast iron material developed in the 1950s. The performance of ductile iron is close to that of steel. "Replacing steel with iron" refers to ductile iron, because ductile iron is spheroidized Compared with inoculated spherical graphite, spherical graphite has less splitting effect on the metal matrix, so the metal matrix is ​​relatively continuous, which improves the plasticity and toughness of cast iron, and can be used for components with more complex forces. [0003] The engine bearing cover is one of the products of ductile iron. The function of the bearing cover is to protect the interior from being polluted by external dust, to prevent the internal oil from overflowing, and to protect the internal vulnerable parts from being damaged. This requires the bearin...

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): C21C1/10C22C33/10C22C37/04C21D1/26C21D1/18C21D1/28C22C37/10C21D9/40
CPCC21C1/10C21C1/105C22C33/10C22C37/04C21D1/26C21D1/18C21D1/28C22C37/10C21D9/40Y02P10/20
Inventor 陶一鸣
Owner JIANGYIN HONGCHUANG CASTING
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