High-strength high-toughness low-temperature-resistant ferritic nodular cast iron

A ductile iron, toughness technology, applied in the field of ductile iron materials, can solve problems such as no clear strength index

Inactive Publication Date: 2012-10-03
上海宏钢电站设备铸锻有限公司
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is that the ductile iron meets the impact requirements of the i

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
  • High-strength high-toughness low-temperature-resistant ferritic nodular cast iron
  • High-strength high-toughness low-temperature-resistant ferritic nodular cast iron
  • High-strength high-toughness low-temperature-resistant ferritic nodular cast iron

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] A high-strength, strong-toughness, low-temperature-resistant ferritic ductile iron, the weight percentages of its components are as follows:

[0020] C 3.62~3.80%, Si 1.90~2.35%, Mn <0.20%,

[0021] RE 0.007~0.018%, Mg 0.043~0.060%, P<0.035%, S≤0.020%,

[0022] The remainder is iron and other impurity elements. In the impurity elements, Mo<0.010%, Ti<0.025%,

[0023] The silicon-carbon ratio is Si / C=0.50~0.63.

[0024] The component parameters of each embodiment are as follows:

[0025] .

[0026] In each of the examples, there are two kinds of co-cast test blocks of 40mm and 70mm.

[0027] The smelting and pouring process is as follows:

[0028] 1. 1. Charge ratio: (weight percentage of molten iron, the same below): 40% pig iron for ductile iron, 40% carbon scrap, and 20% ductile iron scrap.

[0029] Then add 1.0~1.30% recarburizer to ach...

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 high-strength high-toughness low-temperature-resistant ferritic nodular cast iron. The high-strength high-toughness low-temperature-resistant ferritic nodular cast iron comprises the following components in percentage by weight: 3.62 to 3.80 percent of C, 1.90 to 2.35 percent of Si, less than 0.20 percent of Mn, 0.007 to 0.018 percent of RE, 0.043 to 0.060 percent of Mg, less than 0.035 percent of P, less than or equal to 0.020 percent of S, and the balance of iron and other impurity elements, wherein in the impurity elements, Mo is controlled to be less than 0.010 percent, and Ti is controlled to be less than 0.025 percent; and the ratio of the Si to the C is 0.50-0.63. Through a lot of test and research, the Si-C ratio is reasonably controlled, low-temperature nodular cast iron can obtain relatively high tensile strength and yield strength, and the low-temperature impact toughness of -40 DEG C can also be ensured; and the ideal low-temperature impact toughness is obtained while the function of a silicon reinforced metallic matrix is exerted, so that the performance requirements are met, and the cost is also greatly reduced.

Description

technical field [0001] The invention relates to a ductile iron material, in particular to a ferrite ductile iron with high strength, toughness and low temperature resistance (-40°C). Background technique [0002] Wind is a green and renewable resource. As a clean energy in the 21st century, the total amount of wind power generation in the world has grown at an annual rate of 26% in the past 10 years, and there will still be a larger growth rate in the future. List "high-power wind turbines" as the main content of revitalizing the equipment manufacturing industry. Because wind turbines are installed in different wind farms, whether on land or at sea, the operating environment temperature varies greatly (the working environment temperature is -20°C to 40°C, and the living environment temperature does not exceed -40°C to 50°C). In wind power components, the hub, frame, base and other components are all made of low-temperature ductile iron, and are required to have low-temperat...

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): C22C37/10
Inventor 蒋毓良张伟徐德民吴铁明
Owner 上海宏钢电站设备铸锻有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap