Spheroidal graphite cast iron having excellent strength and toughness and its production method
US-10087509-B2 · Oct 2, 2018 · US
High rigid spheroidal graphite cast iron
US10745784B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10745784-B2 |
| Application number | US-201515562937-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 15, 2015 |
| Priority date | Mar 30, 2015 |
| Publication date | Aug 18, 2020 |
| Grant date | Aug 18, 2020 |
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Abstract
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A high rigid spheroidal graphite cast iron, comprising: more than 3.0% to less than 3.6% of C, 1.5 to 3.0% of Si, 1.0% or less of Mn, 1.0% or less of Cu, less than 0.03% of P, 0.02% to 0.07% of Mg, residual Fe and inevitable impurities, as represented by mass %, wherein a carbon equivalent (a CE value) calculated by the mathematical expression (1): CE=C %+Si %/3 in terms of C and Si contents is 3.6 to 4.3%, the Young's modulus is 170 GPa or more, the tensile strength is 550 MPa or more, and the impact value is 12 J/cm 2 or more.
First claim
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What is claimed is: 1. A high rigid spheroidal graphite cast iron, having a hypoeutectic composition, and consisting of more than 3.0% to less than 3.6% of C, 1.5 to 3.0% of Si, 1.0% or less of Mn, 1.0% or less of Cu, less than 0.03% of P, 0.02% to 0.07% of Mg, residual Fe and inevitable impurities, as represented by mass %, wherein a carbon equivalent (a CE value) calculated by the mathematical expression (1): CE=C %+Si %/3 in terms of C and Si contents is 3.6 to less than 4.2%, the Young's modulus is 174.3 GPa or more, the tensile strength is 550 MPa or more, and the impact value is 12 J/cm 2 or more, wherein the total contents of Mn and Cu are 0.45 to 0.70%, as represented by mass %, and a ratio (P/(Mn+Cu)) of the P content and the total content of Mn and Cu is 0.034 to 0.047% as represented by mass %.
Assignees
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Classifications
Graphite · CPC title
- C22C37/10Primary
containing aluminium or silicon · CPC title
containing spheroidal graphite · CPC title
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- What does patent US10745784B2 cover?
- A high rigid spheroidal graphite cast iron, comprising: more than 3.0% to less than 3.6% of C, 1.5 to 3.0% of Si, 1.0% or less of Mn, 1.0% or less of Cu, less than 0.03% of P, 0.02% to 0.07% of Mg, residual Fe and inevitable impurities, as represented by mass %, wherein a carbon equivalent (a CE value) calculated by the mathematical expression (1): CE=C %+Si %/3 in terms of C and Si contents is…
- Who is the assignee on this patent?
- Kk Riken
- What technology area does this patent fall under?
- Primary CPC classification C22C37/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 18 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).