Production method for improving graphite form of spheroidal graphite cast iron
A production method and technology of ductile iron, applied in the direction of casting mold, casting mold composition, casting molding equipment, etc., can solve the problem of large fluctuation of punching method, improvement, technology, equipment reliability, and quality of cored wire. and other problems, to achieve the effect of high reliability and simple processing technology
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0048] Example 1: Using the prior art method to produce a single pearlite matrix ductile iron crankshaft
[0049] The weight of the part is 48Kg, the basic wall thickness is 25mm, and the outline dimension is 600*240*245mm.
[0050] (1) Use Q10 low-sulfur low-titanium pig iron 20%, carbon steel 55%, pearlite type reheating iron 25%; then add 0.18% of the total mass of the main charge of 75 ferrosilicon, 0.35% of 65 high-carbon ferromanganese, 0.4 % Electrolytic copper (low lead, 99.99% purity) and 2.45% graphite recarburizer. The composition of raw molten iron obtained by smelting is as follows: C: 3.85%, Si: 0.78%, Mn: 0.42%, Cu: 0.44%, S: 0.012%, Ti: 0.031%.
[0051] (2) Spheroidizing treatment: add 0.95% of the mass of molten iron with low rare earth 1-6 spheroidizing agent, 0.32% BS-1A inoculant, 0.21% BS-1SB, 0.4% 75 silicon Iron is used as an inoculant.
[0052] (3) The molten iron is tapped in 2 steps. In the first step, 85-90% molten iron is produced, and the tapping speed r...
Embodiment 2
[0055] Example 2: Production of a single pearlite matrix ductile iron crankshaft
[0056] The weight of the part is 48Kg, the basic wall thickness is 25mm, and the outline dimension is 600*240*245mm.
[0057] (1) Use Q10 low-sulfur low-titanium pig iron 20%, carbon steel 55%, pearlite type reheating iron 25%; then add 0.18% of the total mass of the main charge of 75 ferrosilicon, 0.35% of 65 high-carbon ferromanganese, 0.4 % Electrolytic copper (low lead, 99.99% purity) and 2.45% graphite recarburizer. The composition of the raw molten iron obtained by smelting is as follows: C: 3.85%, Si: 0.78%, Mn: 0.42%, Cu: 0.44%, S: 0.012%, Ti: 0.031%.
[0058] (2) Spheroidizing treatment: Add 0.95% of the mass of molten iron with low rare earth 1-6 spheroidizing agent, 0.32% BS-1A inoculant and 0.21% BS-1SB, and add 0.1% SiCaMn to deoxidize. As an inoculant, 0.4% of 75 ferrosilicon is used as an inoculant.
[0059] (3) The molten iron is tapped in 2 steps. In the first step, 85-90% molten iron...
Embodiment 3
[0061] Example 3: Production of a single pearlite matrix ductile iron crankshaft
[0062] The weight of the part is 70Kg, the basic wall thickness is 25mm, and the outline dimension is 800*250*250mm.
[0063] (1) Use Q10 low-sulfur low-titanium pig iron 20%, carbon steel 55%, pearlite type reheating iron 25%; then add 0.18% of the total mass of the main charge of 75 ferrosilicon, 0.35% of 65 high-carbon ferromanganese, 0.4 % Electrolytic copper (low lead, purity 99.99%) and 2.45% graphite recarburizer, smelted to obtain the following raw iron liquid: C: 3.8-3.9%, Si: 0.7-0.9%, Mn: 0.4-0.5% , Cu: 0.4-0.5%, S≤0.03%, Ti≤0.035%.
[0064] (2) Spheroidizing treatment: Add 0.95% of the mass of molten iron with low rare earth 1-6 spheroidizing agent, 0.32% of BS-1A inoculant, 0.22% of BS-1SB, and 0.1% of SiCaMn in the spheroidizing bag Deoxidizer, 0.4% of 75 ferrosilicon is used as an inoculant.
[0065] (3) The molten iron is tapped in 2 steps, the first time is 85-90% molten iron, the tap...
PUM
Property | Measurement | Unit |
---|---|---|
particle size | aaaaa | aaaaa |
particle size | aaaaa | aaaaa |
diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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