Nodular cast iron material, composition containing same, brake head and preparation method for nodular cast iron material
AU2025326210A1Pending Publication Date: 2026-07-23CRRC QIQIHAR ROLLING CO LTD
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Patent Information
- Authority / Receiving Office
- AU · AU
- Patent Type
- Applications
- Current Assignee / Owner
- CRRC QIQIHAR ROLLING CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-23
AI Technical Summary
Technical Problem
Existing ductile iron materials cannot meet the requirements for high-quality brake shoe tors, especially in terms of strength, toughness, and casting performance.
Method used
By controlling the composition ratio of ductile iron materials, including the content of C, Si, Cu, Mn, P, and S, and combining the use of spheroidizing agents and inoculants, smelting, spheroidizing, and inoculation treatments are carried out to finally obtain ductile iron materials with high yield strength, tensile strength, and elongation.
Benefits of technology
The prepared ductile iron material has high strength and good plasticity, meeting the requirements of high-quality brake shoe tors, reducing manufacturing costs and improving casting processability.
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Abstract
The present application provides a nodular cast iron material, a composition containing same, a brake head, and a preparation method for the nodular cast iron material. The nodular cast iron material comprises the following components in percentage by mass: C 3.35%-3.81%, Si 2.35%-2.75%, Cu 0.1%-0.28%, Mn 0.15%-0.33%, P≤0.03%, S≤0.02%, and the balance of iron and inevitable impurities. Nodular cast iron manufactured on the basis of the nodular cast iron material of the present application exhibits not only high strength, but also good plasticity, and can meet the requirements of manufactured high-quality brake heads.
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