Dot graphite cast iron and its production method
A graphite cast iron and dot-shaped technology, which is applied in the field of iron-carbon alloys, can solve the problems of large-section castings, such as the easy decline of central spheroidization, the reduction of material structure stability, and environmental hazards, so as to achieve stable spheroidization effects, reduce shrinkage requirements, and improve production efficiency. low cost effect
Inactive Publication Date: 2007-01-03
肖治平 +1
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although nodular cast iron has been widely used since its inception, there are still the following shortcomings: one is to use expensive magnesium or magnesium alloy as nodularizer; the other is to use high-quality iron with high value, and strictly limit the content of sulfur and phosphorus; The third is that during the pre-furnace treatment, due to the intense combustion of magnesium, it will cause great harm to the environment; the fourth is that the central spheroidization of large-section castings is easy to decline, which reduces the stability of the material structure and increases the overall cost.
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 moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] Embodiment 1: dot shape graphite cast iron, control weight percentage carbon content is 3-3.3%, silicon 1.5-1.6%, manganese 0.5-0.6%, take ferrite as matrix, the number of micron order dot shape graphite in matrix is 800- 1000pcs / mm 2 .
Embodiment 2
[0032] Embodiment 2: Dotted graphite malleable cast iron, the weight percent carbon content is 2.6-2.7%, silicon 1.3-1.4%, manganese 0.45-0.55%, with ferrite as the matrix, wherein the number of micron-sized dotted graphite is 300-500 / mm 2 .
Embodiment 3
[0033] Embodiment 3: Dotted graphite malleable cast iron, the weight percent carbon content is 2.3-2.4%, silicon 1.2-1.3%, manganese 0.9-1.0%, with cementite as the matrix, the number of dotted graphite is 0-100 / mm 2 .
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
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
A dot-graphite cast iron contanis C (2.2-3.6 wt.%), Si (1.0-1.8), Mn (0.4-1.2) and Fe (rest). It is prepared through smelting iron in copola furnace while controlling the contents of C, Si and Mn, adding modifier (SiFe, RE-SiFe, SiCa, Or AlBiSb alloy) to casting lalde, laying aside for 3-5 min, skimming, and casting at 1350 deg.C. The performance of its casting is higher than that of nodular graphite cast iron.
Description
technical field [0001] The invention relates to an iron-carbon alloy, in particular to point-shaped graphite cast iron and a production method thereof. Background technique [0002] At present, there are no data reports on point-shaped graphite cast iron at home and abroad. Its closest relative is ductile iron. In ductile cast iron, the carbon in the cast iron exists in the form of spherical graphite mainly through the magnesium-containing nodularizer, which greatly reduces the harm caused by flake graphite. Although nodular cast iron has been widely used since its inception, there are still the following shortcomings: one is to use expensive magnesium or magnesium alloy as nodularizer; the other is to use high-quality iron with high value, and strictly limit the content of sulfur and phosphorus; The third is that during the pre-furnace treatment, due to the intense combustion of magnesium, it will cause great harm to the environment; the fourth is that the central spheroi...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/00C22C33/08
Inventor 肖至刚肖治平
Owner 肖治平