CN1023574C - Alloy for preventing corrosion from molten metals - Google Patents
Alloy for preventing corrosion from molten metals Download PDFInfo
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- CN1023574C CN1023574C CN 92110329 CN92110329A CN1023574C CN 1023574 C CN1023574 C CN 1023574C CN 92110329 CN92110329 CN 92110329 CN 92110329 A CN92110329 A CN 92110329A CN 1023574 C CN1023574 C CN 1023574C
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- alloy
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- preventing corrosion
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Abstract
The present invention provides an alloy for preventing corrosion from molten metal, which is mainly used for strip steel productive equipment for hot galvanizing and hot dipping aluminizing, and has the chemical ingredients (weight percentage): 0.25 to 0.65% of C, 2.5 to 5.2% of Si, 0.5 to 1.5% of Mn, 5 to 15% of Cr, 0.5 to 3.5% of Mo, 0.1 to 0.3% of RE, at most 6 % of Al and Fe as the rest. The present invention has good liquid-metal corrosion resistance and wear resistance. The corrosion gravity of the present invention is quite light when the alloy is continuously corroded in a liquid state aluminium base alloy at 70 DEG C for more than 240 hours and in a liquid state zinc base alloy at the temperature of 400 to 500 DEG C.
Description
The invention belongs to field of alloy steel.Mainly be applicable to anti-liquid metal corrosion in pot galvanize and the hot dip aluminium strip steel production equipment with attrition resistant parts or equipment.
Be used to manufacture molten-metal-resistant (as Zn, Al etc.) corrosion and attrition resistant equipment before, the particularly direct parts that directly contact with molten metal, great majority adopt technically pure irons, cast iron, nickel chromium stainless steels etc.Because under liquid metal temperature, the parts metal that liquid metal is in direct contact with it reacts, produce to be diffused as main solvability corrosion, parts suffer damage, and reduce work-ing life.Because the The modern industry development need requires the Coated Steel solidity to corrosion to significantly improve, so developed plate golding zincio alloy (as Zn-5Al), the above-mentioned metallic substance of previously used anti-pure liquid zinc corrosion all can not satisfy service requirements.Therefore, must develop the metallic substance of tolerance of liquid zinc base alloy corrosion.
In the prior art, DE3543601, SU633924, US3469922 all provide alloy close with the present invention, same field.Though these materials all have higher high temperature strength and good high-temperature antioxidant property, also there is a common main drawback, promptly wear-resisting the and corrosion resisting property in liquid metal is relatively poor.
The objective of the invention is to improve a kind of existing higher high temperature strength and good high-temperature antioxidant property, the alloy of the preventing corrosion from molten metals of wear-resisting and corrosion resisting property excellent in liquid metal is arranged again.
According to above-mentioned purpose, the chemical ingredients of the metallic substance of the preventing corrosion from molten metals that the present invention is designed (weight %) is: C0.25～0.65%, and Si2.5～5.2%, Mn0.5～1.5%, Cr5～15%, Mo0.5～3.5%, RE0.1～0.3%, Al≤6%, surplus is Fe.
Alloy of the present invention is to add an amount of Mo, Cr element in Fe-Si sosoloid, so that further improve the solidity to corrosion of matrix alloy in liquid metal.The main effect that Cr adds in the alloy is to generate M
7C
3Carbide is so as to improving the wear resistance of Fe-Si sosoloid.But Cr, Mo alloying element are unsuitable too high, if too high levels, then reduce the toughness of alloy, have also increased the cost of alloy simultaneously, but when being lower than lower limit composition of the present invention, then are difficult to keep the solidity to corrosion and the wear resistance of alloy.Therefore, Cr content with 5～15% and Mo content be advisable with 0.5～3.5.Si content is 2.5～5.2% among the present invention, when Si content is higher than 5.2%, then influences the mechanical property and the weldability of alloy.The main effect of adding Mn in the alloy is deoxidation and the sweetening effectiveness when guaranteeing melting; Mn is too high, causes the mechanical property of alloy to worsen.
With the alloy phase ratio of existing same area, the maximum characteristics of the present invention on chemical ingredients are to have added 0.1～0.3%RE.RE has thinning microstructure, refinement dendrite and purifies the effect of crystal boundary in alloy, improved wear resistance and the solidity to corrosion of alloy solid solution body in liquid metal significantly.For high-temperature oxidation resistance and anti-some the liquid alloy corrosion that improves alloy of the present invention, but also add Al≤6% in the alloy simultaneously.
The production technique of alloy of the present invention is as follows: with electric arc furnace or medium-frequency induction furnace melting, may be cast in then in sand mo(u)ld or the ceramic die, can directly pour into component, also pourable one-tenth steel ingot forges or rolling becoming a useful person subsequently.The teeming temperature of molten steel is 1500～1580 ℃, and steel ingot forges or rolling temperature is 900～1150 ℃.
Compared with prior art, the present invention has excellent anti-liquid metal corrosion and wear resistance.Continuous corrosion is 254 hours in the liquid zinc base alloy (Zn-5%Al) of this alloy under 400～500 ℃ of temperature, and still corrosion is extremely slight, and weightlessness is extremely low; And for example continuous corrosion 240 hours in the liquid aluminium alloy (Al-8%Si) under 700 ℃ of temperature, still weightlessness very little (seeing Table 2).
Embodiment
According to chemical ingredients scope of the present invention, on medium-frequency induction furnace, smelted 4 stoves alloy of the present invention.In order to contrast, it is close with chemical ingredients of the present invention also to have smelted two stoves simultaneously on same stove, but does not contain the similar alloy of rare earth, and its concrete chemical ingredients is as shown in table 1.After melting is intact, casting ingot-forming, 1520～1580 ℃ of teeming temperatures.Cut sample from the ingot of cast, carry out the continuity corrosion test in the zinc base alloy (Zn-5%Al) of liquid state and aluminum base alloy (Al-8%Si), test employing weight-loss method is measured its corrosion rate, and test-results is listed table 2 in.In order to contrast, also list the composition and the corrosive nature of 1Cr17,08F, three alloys of 304SS in table 1 and table 2 respectively.
Table 1 embodiment of the invention and comparative alloy chemical ingredients (weight %)
Composition C Si Mn Cr Mo Al RE Fe
Heat (batch) number
Surplus in the of 1 0.48 4.2 0.6 5.4 3.4 0.1
Surplus the present invention 2 0.28 4.0 0.5 9.2 1.1 0.2
Surplus in the of 3 0.42 2.8 1.2 10.3 1.0 0.2
Surplus in the of 4 0.48 4.5 0.8 9.4 1.5 3.0 0.3
Do not contain rare earth 5 0.35 3.8 1.2 12.0 1.8 surplus
Contrast close surplus in the of 6 0.49 4.3 0.6 8.8 1.3
Surplus other 1C,r17 0.95 0.3 0.6 17.2
Surplus the 08F 0.07 0.1 0.12
Alloy 304SS 0.12 0.8 0.5 18.5 Ni8 is surplus
Table 2 embodiment of the invention and comparative alloy corrosive nature
Corrosion at 440 ℃ of liquid zn-5%Al at 700 ℃ of liquid Al-8%
Continuous corrosion in the continuous corrosion 254 little Si alloys in the condition alloy
240 hours corrosion rate of corrosion rate during alloy (weightlessness)
Heat (batch) number Mg/cm
2(weightlessness) mg/cm
2
1 13 do not survey
The present invention 20 228
3 0 110
4 8 130
Do not contain 5 165 480 of rare earth
Comparative alloy 6 110 is not surveyed
Other 1C,r17 693 732
08F 889 samples dissolve
Alloy 304SS sample has dissolved 1580
Claims (2)
1, a kind of alloy of preventing corrosion from molten metals, it is characterized in that chemical ingredients (weight %) is: C 0.25～0.65%, and Si 2.5～5.2%, and Mn 0.5～1.5%, Cr5～15%, Mo 0.5～3.5%, and RE 0.1～0.3%, and surplus is Fe.
2, alloy according to claim 1 is characterized in that in the chemical ingredients (weight %) of alloy Al≤6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110329 CN1023574C (en) | 1992-09-10 | 1992-09-10 | Alloy for preventing corrosion from molten metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110329 CN1023574C (en) | 1992-09-10 | 1992-09-10 | Alloy for preventing corrosion from molten metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069773A CN1069773A (en) | 1993-03-10 |
| CN1023574C true CN1023574C (en) | 1994-01-19 |
Family
ID=4944745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92110329 Expired - Fee Related CN1023574C (en) | 1992-09-10 | 1992-09-10 | Alloy for preventing corrosion from molten metals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023574C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789861B (en) * | 2015-05-08 | 2016-08-24 | 山东钢铁股份有限公司 | A kind of high intensity steel plate of resistance to molten zinc corrosion and manufacture method thereof |
-
1992
- 1992-09-10 CN CN 92110329 patent/CN1023574C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1069773A (en) | 1993-03-10 |
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