CN105296892A - Method for manufacturing high-chromium low-carbon abrasion-resistant alloy hydraulic cylinder - Google Patents
Method for manufacturing high-chromium low-carbon abrasion-resistant alloy hydraulic cylinder Download PDFInfo
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- CN105296892A CN105296892A CN201510734967.7A CN201510734967A CN105296892A CN 105296892 A CN105296892 A CN 105296892A CN 201510734967 A CN201510734967 A CN 201510734967A CN 105296892 A CN105296892 A CN 105296892A
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Abstract
The invention discloses a method for manufacturing a high-chromium low-carbon abrasion-resistant alloy hydraulic cylinder. The method comprises the following manufacturing process steps: (a), casting molten steel subjected to ladle inoculation treatment into a casting in a sand mould or a metal mold, wherein the melt casting temperature is 1500-1550 DEG C, and the cast molten steel comprises the following chemical components in percentage by weight: 0.45-0.65 percent of C, 2.5-3.5 percent of Cr, 1.5-2.3 percent of Si, 0.3-0.5 percent of Mn, 0.03-0.08 percent of Bi, 0.12-0.16 percent of Co, 0.12-0.23 percent of Ti, 0.03-0.12 percent of Zr, 0.2-0.4 percent of Ni, 0.04-0.09 percent of W, 0.02-0.15 percent of Pb, less than 0.05 percent of S, less than 0.05 percent of P and the balance of Fe and inevitable impurity elements. The process flow can be shortened, the production cost is reduced, inoculation treatment is performed during casting, the casting is subjected to subcritical annealing, the percentage composition of each alloy component in metals is guaranteed, and mechanical properties of the hydraulic cylinder are improved.
Description
Technical field
The present invention relates to a kind of high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, belong to steel alloy technical field of smelting.
Background technology
Hydraulic ram adopts a kind of pressure skin processing usually, utilize metal in the cold plasticity feature of normal temperature state, rolling tools are utilized to apply certain pressure to workpiece surface, workpiece surface metal is made to produce plastic flow, be filled in the indentation trough of original residual, and reach the reduction of workpiece surface roughness value.Due to rolled coating metal viscous deformation, make textura epidermoidea's cold hardening and crystal grains fine, form fine and close threadiness, and form unrelieved stress layer, hardness and intensity improve, thus improve the wear resistance of workpiece surface, solidity to corrosion and conformability.In above technique, key point is the casting process interalloy composition of oil cylinder and heat treated control.
Summary of the invention
The object of this invention is to provide a kind of high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, can shortened process, reduce production cost, go bad during cast inoculation, foundry goods subcritical annealing, ensure that each alloying constituent percentage composition in metal, improve the every mechanical property of hydraulic ram.
Technical scheme of the present invention is as follows:
A kind of high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, its manufacturing technology steps is as follows:
A, the molten steel crossed through bag endomorphism inoculation is poured into foundry goods in sand mold or metal mold, melt cast temperature is 1500 ~ 1550 DEG C, in pouring molten iron, chemical composition and weight percent thereof are: 0.45 ~ 0.65%C, 2.5 ~ 3.5%Cr, 1.5 ~ 2.3%Si, 0.3 ~ 0.5%Mn, 0.03 ~ 0.08%Bi, 0.12-0.16%Co, 0.12-0.23%Ti, 0.03-0.12%Zr, 0.2 ~ 0.4%Ni, 0.04 ~ 0.09%W, 0.02 ~ 0.15%Pb, S < 0.05%, P < 0.05%, surplus is Fe and inevitable impurity element,
After b, casting finish, at 600 ~ 650 DEG C of temperature, be incubated 3-4 hour carry out subcritical annealing, substrate degradation is become the mixture of ferrite and carbide, make its hardness be reduced to 40 ~ 45HRC, so that carry out mechanical workout;
C, foundry goods to be heat-treated 940 ~ 1050 DEG C of insulations for 1.5-2 hour, it is made to harden to form austenite, then air cooling is carried out to room temperature, it is 0.5-1.2mm coating that foundry goods surfaces externally and internally smears a layer thickness, coating is made up of following parts by weight material component: aluminum stearate 30-32 part, propylene carbonate 8-10 part, water glass 2-3 part, organobentonite 4.5-6 part, polyvinyl alcohol 2.3-3.5 part, dimethylbenzene 10-12 part, lignosulfonic acid 1.2-2 part, Xylo-Mucine 2.8-3.5 part, part, brown iron oxide 0.4-0.8 part, alcohol 50-55 part.
Coating is made up of following parts by weight material component: aluminum stearate 31 parts, propylene carbonate 9 parts, water glass 2.5 parts, organobentonite 5.2 parts, polyvinyl alcohol 2.9 parts, dimethylbenzene 11 parts, lignosulfonic acid 1.6 parts, Xylo-Mucine 3.1 parts, part, brown iron oxide 0.6 part, alcohol 52 parts.
The present invention can shortened process, and reduce production cost, the inoculation that goes bad during cast, foundry goods subcritical annealing, ensure that each alloying constituent percentage composition in metal, improve the every mechanical property of hydraulic ram.
Embodiment
A kind of high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, its manufacturing technology steps is as follows:
A, the molten steel crossed through bag endomorphism inoculation is poured into foundry goods in sand mold or metal mold, melt cast temperature is 1500 ~ 1550 DEG C, in pouring molten iron, chemical composition and weight percent thereof are: 0.45 ~ 0.65%C, 2.5 ~ 3.5%Cr, 1.5 ~ 2.3%Si, 0.3 ~ 0.5%Mn, 0.03 ~ 0.08%Bi, 0.12-0.16%Co, 0.12-0.23%Ti, 0.03-0.12%Zr, 0.2 ~ 0.4%Ni, 0.04 ~ 0.09%W, 0.02 ~ 0.15%Pb, S < 0.05%, P < 0.05%, surplus is Fe and inevitable impurity element,
After b, casting finish, at 600 ~ 650 DEG C of temperature, be incubated 3-4 hour carry out subcritical annealing, substrate degradation is become the mixture of ferrite and carbide, make its hardness be reduced to 40 ~ 45HRC, so that carry out mechanical workout;
C, foundry goods to be heat-treated 940 ~ 1050 DEG C of insulations for 1.5-2 hour, it is made to harden to form austenite, then air cooling is carried out to room temperature, it is 0.5-1.2mm coating that foundry goods surfaces externally and internally smears a layer thickness, coating is made up of following parts by weight material component: aluminum stearate 31 parts, propylene carbonate 9 parts, water glass 2.5 parts, organobentonite 5.2 parts, polyvinyl alcohol 2.9 parts, dimethylbenzene 11 parts, lignosulfonic acid 1.6 parts, Xylo-Mucine 3.1 parts, part, brown iron oxide 0.6 part, alcohol 52 parts.
The mechanics properties testing data of embodiment of the present invention hydraulic ram are as follows:
Tensile strength sigma b (MPa): >=1000
Yield strength σ s (Mpa): >=900
Elongation δ 5 (%): >=14.2
Relative reduction in area ψ (%): >=45
Impact energy Ak v (J): >=60.
Claims (2)
1. a high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, is characterized in that: its manufacturing technology steps is as follows:
A, the molten steel crossed through bag endomorphism inoculation is poured into foundry goods in sand mold or metal mold, melt cast temperature is 1500 ~ 1550 DEG C, in pouring molten iron, chemical composition and weight percent thereof are: 0.45 ~ 0.65%C, 2.5 ~ 3.5%Cr, 1.5 ~ 2.3%Si, 0.3 ~ 0.5%Mn, 0.03 ~ 0.08%Bi, 0.12-0.16%Co, 0.12-0.23%Ti, 0.03-0.12%Zr, 0.2 ~ 0.4%Ni, 0.04 ~ 0.09%W, 0.02 ~ 0.15%Pb, S < 0.05%, P < 0.05%, surplus is Fe and inevitable impurity element,
After b, casting finish, at 600 ~ 650 DEG C of temperature, be incubated 3-4 hour carry out subcritical annealing, substrate degradation is become the mixture of ferrite and carbide, make its hardness be reduced to 40 ~ 45HRC, so that carry out mechanical workout;
C, foundry goods to be heat-treated 940 ~ 1050 DEG C of insulations for 1.5-2 hour, it is made to harden to form austenite, then air cooling is carried out to room temperature, it is 0.5-1.2mm coating that foundry goods surfaces externally and internally smears a layer thickness, coating is made up of following parts by weight material component: aluminum stearate 30-32 part, propylene carbonate 8-10 part, water glass 2-3 part, organobentonite 4.5-6 part, polyvinyl alcohol 2.3-3.5 part, dimethylbenzene 10-12 part, lignosulfonic acid 1.2-2 part, Xylo-Mucine 2.8-3.5 part, part, brown iron oxide 0.4-0.8 part, alcohol 50-55 part.
2. according to claim 1 high chromium low-carbon abrasion resistant aluminium alloy compressing cylinder preparation method, it is characterized in that: coating is made up of following parts by weight material component: aluminum stearate 31 parts, propylene carbonate 9 parts, water glass 2.5 parts, organobentonite 5.2 parts, polyvinyl alcohol 2.9 parts, dimethylbenzene 11 parts, lignosulfonic acid 1.6 parts, Xylo-Mucine 3.1 parts, part, brown iron oxide 0.6 part, alcohol 52 parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510734967.7A CN105296892A (en) | 2015-11-03 | 2015-11-03 | Method for manufacturing high-chromium low-carbon abrasion-resistant alloy hydraulic cylinder |
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| CN201510734967.7A CN105296892A (en) | 2015-11-03 | 2015-11-03 | Method for manufacturing high-chromium low-carbon abrasion-resistant alloy hydraulic cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001438A (en) * | 2016-05-26 | 2016-10-12 | 合肥和安机械制造有限公司 | Method for manufacturing alloy muffler of forklift |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994907A (en) * | 2012-09-29 | 2013-03-27 | 铜陵国方水暖科技有限责任公司 | Casting method of check valve body |
| CN103498107A (en) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof |
| CN104350167A (en) * | 2012-06-08 | 2015-02-11 | 新日铁住金株式会社 | Steel wire rod or bar steel |
-
2015
- 2015-11-03 CN CN201510734967.7A patent/CN105296892A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104350167A (en) * | 2012-06-08 | 2015-02-11 | 新日铁住金株式会社 | Steel wire rod or bar steel |
| CN102994907A (en) * | 2012-09-29 | 2013-03-27 | 铜陵国方水暖科技有限责任公司 | Casting method of check valve body |
| CN103498107A (en) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001438A (en) * | 2016-05-26 | 2016-10-12 | 合肥和安机械制造有限公司 | Method for manufacturing alloy muffler of forklift |
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Application publication date: 20160203 |
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