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

Composite inoculant

A composite inoculant and inoculant technology, applied in the field of metallurgy, can solve problems such as increased costs and waste of resources, and achieve the effects of increasing hardness, reducing segregation, and uniform distribution

Inactive Publication Date: 2012-07-11
王萍
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to remove phosphorus, corresponding technological measures must be taken to increase costs or give up, resulting in a large waste of resources

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 Construction

[0016] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0017] A composite inoculant, the weight ratio of the components of the inoculant is: carbon 20-30%; silicon 40-50%; rare earth 6-9%; strontium 0.6-0.8%; barium 2.2-2.8%; calcium 0.1- 0.2%; aluminum 0.1-0.2%; the balance is iron, and the preparation method of the present invention adopts the remelting method: after mixing the various elements prepared in the above ratio, remelt and crystallize in an electric furnace and pour into blocks, and break into 3- 8mm granular.

[0018] The rare earths mentioned in the present invention are the lanthanide elements in the chemical cycle: lanthanum, cerium, praseodymium, neodymium, pr...

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 relates to a composite inoculant, which contains the following ingredients of: by weight, 20-30% of carbon, 40-50% of silicon, 6-9% of rare earth, 0.6-0.8% of strontium, 2.2-2.8% of barium, 0.1-0.2% of calcium, 0.1-0.2% of aluminium, and the balance being iron. In addition, 0.06-0.08 wt% of tin is added in the composite inoculant. The composite inoculant provided by the invention can effectively prolong graphitization depression time, substantially increase casting hardness and eliminate white castings, is especially in favor of improving the morphology and distribution of graphite in thin-walled castings, lowers the difference between crystal structures of positions with different thicknesses, reduces shrinkage tendency of castings, improves compactness of castings, raises cold-hot fatigue resistance and mechanical fatigue of castings, minimizes segregation of phosphor in cast iron, and makes phosphor become fine and uniformly-distributed binary iron phosphide eutectic in cast iron.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a composite inoculant. Background technique [0002] The existing types of inoculants are mainly divided into three types: 1. graphitized type; 2. mixed type; 3. stabilized type. General inoculants mainly refer to graphitization inoculants; mixed inoculants are mechanical mixtures of various inoculant materials; stabilized inoculants have stable pearlite in addition to graphitization functions. Silicon is graphitized, generally containing 60-80% silicon, the most widely used is FeSi75, in addition to being the main silicon, it can also be compounded with other elements, such as Ba, Ca, Mn, Zr, Sr, Ti, Mg, Al, C, B, Sn, etc. to play various specific roles. [0003] In the prior art, such as the "cast iron inoculation treatment substitute bismuth alloy" reported in the patent application number 88101363.3 invention patent application publication, the inoculant contains bismuth 4-14%; co...

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
IPC IPC(8): C22C33/08C21C1/08B22D1/00B22D27/20
Inventor 王平
Owner 王萍
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