CN1035521C - Anti-sea water corrosion alloy cast iron - Google Patents
Anti-sea water corrosion alloy cast iron Download PDFInfo
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- CN1035521C CN1035521C CN 93118529 CN93118529A CN1035521C CN 1035521 C CN1035521 C CN 1035521C CN 93118529 CN93118529 CN 93118529 CN 93118529 A CN93118529 A CN 93118529A CN 1035521 C CN1035521 C CN 1035521C
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- cast iron
- alloy cast
- sea water
- iron
- water corrosion
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Abstract
The present invention discloses alloy cast iron with sea water corrosion resistance, which is suitable for manufacturing hydraulic engineering and hydroelectric engineering devices, such as gates, gate slots, etc. The alloy cast iron with sea water corrosion resistance contains nickel, chromium, manganese, silicon, carbon and copper. The use performance of each hydraulic engineering and hydroelectric engineering device made of the alloy cast iron is better than that of the device made of stainless steel; the strength, the toughness and the processing performance can meet the use requirement of hydraulic engineering and hydroelectric engineering facilities.
Description
The present invention relates to iron alloy, is a kind of cast alloy iron of seawater corrosion resistance, can be used as the parts of production hydraulic facility or the material of equipment.
Seawater is got as the unit cooling water by some power plant of China south, water conservancy project equipment and parts has been proposed the requirement of seawater corrosion resistance.The external stainless material that adopts, the stainless steel lock groove of Japanese import is valuated about 2.5 ten thousand dollars/ton.Cast alloy iron with seawater corrosion resistance replaces stainless steel production water conservancy project equipment and parts, the research topic that has become a reality.
Known high silicon corrosiron is a kind of more crisp metallic substance, and its intensity does not meet the requirement of water conservancy project equipment.2 wear-resistant white cast and antifriction cast iron, corrosion-resistant, spoken parts in traditional operas is difficult for processing.The composition of above-mentioned cast iron and performance are referring to GB GBB8491-87, GBB8263-87, JB/ZQ4304-86.
The object of the present invention is to provide a kind of cast alloy iron of seawater corrosion resistance, make water conservancy project equipment or parts, corresponding strength and workability, particularly seawater corrosion resistance can be arranged with it.
The cast alloy iron of a kind of seawater corrosion resistance provided by the invention is characterized in that composition (weight %) is: nickel 2.6-3, and chromium 0.8-1, manganese 0.7-0.9, silicon 1.8-2.1, carbon 2.8-3.2, copper 0.6-0.9, sulphur＜0.06, phosphorus＜0.12, surplus is an iron.
Water conservancy project gate slot with cast alloy iron of the present invention is made meets GB GB7216-87 with test after testing, GB5675-85, and SLJ, DLJ201-80 related request are decided to be qualified product by national competent authorities quality inspection center.Test-results sees Table 1.
With the gate slot that cast alloy iron of the present invention is made, replaced the stainless steel gate slot of import, be domestic initiation, and widely coastland power plant adopts, for China's energy and construction of environmental protection have been made contribution.
Provide below and realize best way of the present invention.
Cast iron of the present invention is smelted with three tons of cupola furnace.
Proportioning raw materials sees Table 2
Processing condition: 50 cubic metres/minute of air quantity, blast 1300 millimeter water column, 1380 ℃ of teeming temperatures.
The performance index of relevant raw material are as follows:
1. the pig iron: 16-20
#
2. ferrosilicon: Si75
#
3. ferromanganese: MnO
#
4. the chemical ingredients of steel scrap: average C0.25-0.6 Si0.2-0.4 Mn0.4-0.8.
5. the chemical ingredients of foundry return: C0.27-3.7 Si1.1-2.6.
Mn0.5-1.4 P＜0.3 S＜0.15
6. nickel plate: Ni-1 Jinchuan company 99.984%.
7. low charcoal ferrochrome Cr01,60.5%.
Experimental study shows
Nickel has the effect of graphitizer in cast iron, help the decomposition of carbide, and it is effective to the hard spot, spoken parts in traditional operas edge and the mottled zone that reduce spoken parts in traditional operas elimination carbide, and slightly can reduce the content of combined carbon in the perlite, and is remarkable especially when nickel reaches 1.5% left and right sides.
Adding the nickel amount in graphitic cast iron is everlasting in the 2.4-3% scope, as the graphite ability of nickel not being added the words of adjusting, even adding nickel reaches 1.5% its intensity and also significant variation can not take place, after particularly adjusting silicone content by the composition of adjusting cast iron, the nickel that adds 0.5-5% can improve the intensity 10-15% of cast iron.
Reduce silicon content and do not add nickel, also can improve intensity, this has just aggravated difference of hardness between the thickness section, the thin unmanageable consequence of section and edge occurs, adds nickel and can obtain high-intensity advantage and the unlikely edge that causes hard difficult processing when reducing silicone content.The adding of nickel removes the intensity that improves cast iron, can also obviously improve the impelling strength of cast iron.
Nickel can be stablized perlite and reduce ferrite content, and the nickel in the cast iron helps to obtain evenly and the structure of one and good solidity to corrosion and comprehensive mechanical performance preferably.
Chromium is one of intensive carbide stable element, adds small additions of chromium in cast iron, and the softish ferrite becomes pearlitic structure to be made and have superfine sheet eutectic graphite in the cast iron and exist, and can make the size of graphite more even, makes cast iron crystal grain tiny.
Carbide increases with the increase of chromium, the foundry goods hardening, and fracture bleaches, and makes processing difficulties.Therefore the add-on of chromium must be controlled at below the limit of point of unlikely generation massive carbide, to guarantee work processibility is preferably arranged.
In cast iron, add a small amount of manganese, can increase the solidity to corrosion of cast iron, particularly effective to seawater, weak acid.
Add a spot of copper, can improve the solidity to corrosion and the wear resistance of cast iron, prolong its work-ing life.
In triturating, require to reduce carbon content or silicon content, or reduce both content simultaneously, more efficient methods be nickel both add with chromium, its composition is generally nickel and is not more than 3%, chromium is not more than 1%.Tensile strength and metallographic structure test-results table
Table 1
| Project name | Test-results |
| Morphological element | Perlite+carbide+sheet and piece flake graphite |
| Perlite quantity (%) | 60-80 |
| Tensile strength | 186.7MPa |
Cast alloy iron raw materials for production proportioning table
Table 2
| The raw material consumption | Coke (Kg) | The pig iron (Kg) | Foundry return (Kg) | Ferrosilicon (Kg) | Ferromanganese (Kg) | Wingdale (Kg) | Steel scrap (Kg) | Nickel plate (Kg) | Ferrochrome (Kg) | Copper (Kg) |
| Scheme 1 | 28 | 100 | 70 | 2 | 2 | 10 | 30 | 5.3 | 2.5 | 0.8 |
| Scheme 2 | 25 | 100 | 55 | 3 | 2 | 12 | 30 | 6.2 | 3 | 0.8 |
Claims (1)
1, a kind of cast alloy iron of seawater corrosion resistance is characterized in that composition (weight %) is: nickel 2.6-3, and chromium 0.8-1, manganese 0.7-0.9, silicon 1.8-2.1, carbon 2.8-3.2, copper 0.6-0.9, sulphur＜0.06, phosphorus＜0.12, surplus is an iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93118529 CN1035521C (en) | 1993-10-11 | 1993-10-11 | Anti-sea water corrosion alloy cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93118529 CN1035521C (en) | 1993-10-11 | 1993-10-11 | Anti-sea water corrosion alloy cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1101683A CN1101683A (en) | 1995-04-19 |
| CN1035521C true CN1035521C (en) | 1997-07-30 |
Family
ID=4992503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93118529 Expired - Fee Related CN1035521C (en) | 1993-10-11 | 1993-10-11 | Anti-sea water corrosion alloy cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035521C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365149C (en) * | 2005-07-25 | 2008-01-30 | 河南禹王水工机械有限公司 | Seawater corrosion resistant alloy cast iron |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343404C (en) * | 2006-01-11 | 2007-10-17 | 昆明嘉和泵业有限公司 | Sulfuric acid corrosion resistant alloy nodular cast iron materials |
| CN102268586B (en) * | 2011-07-31 | 2012-10-03 | 安徽省鸿申压缩机有限公司 | Corrosion-resistant alloy cast iron and preparation method thereof |
| CN105063498B (en) * | 2015-10-01 | 2017-01-18 | 河南省水利水电学校 | Escape gate for hydraulic engineering |
-
1993
- 1993-10-11 CN CN 93118529 patent/CN1035521C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365149C (en) * | 2005-07-25 | 2008-01-30 | 河南禹王水工机械有限公司 | Seawater corrosion resistant alloy cast iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1101683A (en) | 1995-04-19 |
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