CN104878281A - Spheroidal graphite cast iron material for hydraulic spanner piston and preparation method of spheroidal graphite cast iron material - Google Patents
Spheroidal graphite cast iron material for hydraulic spanner piston and preparation method of spheroidal graphite cast iron material Download PDFInfo
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- CN104878281A CN104878281A CN201510239068.XA CN201510239068A CN104878281A CN 104878281 A CN104878281 A CN 104878281A CN 201510239068 A CN201510239068 A CN 201510239068A CN 104878281 A CN104878281 A CN 104878281A
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Abstract
The invention relates to a spheroidal graphite cast iron material for a hydraulic spanner piston. The spheroidal graphite cast iron material contains the following chemical element components in percentage by weight: 3.8%-4.2% of C, 0.8%-1.5% of Mn, 0.03%-0.07% of Cu, 0.2%-0.4% of Ti, 0.05%-0.2% of W, 0.58%-0.80% of Si, 2.6%-3.2% of NI, less than or equal to 0.02% of S, less than or equal to 0.02% of P and the balance of Fe. The piston material disclosed by the invention has the advantages of preferable corrosion resistant property on acid and alkaline, high corrosion resistance and heat resistant capacity at high temperature and good toughness. By adopting a production method disclosed by the invention, the anti-crack property of a cast is enhanced, the rigidity and abrasion-resistant property of a piston surface are enhanced and the service life of the piston is effectively prolonged. According to the production method, a nodulizing agent and a nucleating agent ensure that graphite has preferable roundness and effectively enhance the mechanical property of the nodular graphite cast iron, so that high tensile strength is achieved.
Description
Technical field
The present invention relates to casting technology field, particularly relate to a kind of hydraulic spanner nodular cast iron for piston material and preparation method thereof.
Background technology
Hydraulic spanner is applied to all trades and professions, and hydraulic spanner forms primarily of three parts, body (being also housing), oil cylinder and drive disk assembly.Oil cylinder piston is the important composition parts of hydraulic spanner, is related to working efficiency and the security of spanner.
Current piston also also exists a lot of problem, also needs the hardness, wear resistance, dimensional stability, pore, yield-point, fatigue resistance, the erosion resistance that improve piston.The performance of piston can be improved by the composition and technique improving foundry goods.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic spanner nodular cast iron for piston material and preparation method thereof, this piston material has good corrosion resistance nature to soda acid, at high temperature has higher erosion resistance and temperature capacity, good toughness.
Technical scheme of the present invention is as follows:
A kind of hydraulic spanner nodular cast iron for piston material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Mn0.8-1.5, Cu0.03-0.07, Ti0.2-0.4, W0.05-0.2, Si0.58-0.80, NI2.6-3.2, S≤0.02, P≤0.02, all the other are Fe.
The production method of described hydraulic spanner nodular cast iron for piston material, is characterized in that:
(1) raw material is sent into smelting pot, at 1550-1650 DEG C, after melting, detecting the content of each element in molten iron and adjusting each constituent content to meeting recipe requirements;
(2) nodulizing agent being equivalent to iron liquid weight 2.0-2.2% is poured into the side of dykes and dams in casting ladle, the first nucleating agent being equivalent to iron liquid weight 0.3-0.4% is covered on nodulizing agent equably, pour iron liquid, carry out spheroidizing and first time inoculation, pour residue iron liquid again, the second nucleating agent being equivalent to iron liquid weight 0.25-0.35% pours with stream, completes second time inoculation, cast, obtains ingot casting;
(3) ingot casting is heated to 950-1050 DEG C, insulation 5-6 hour, hardening is cooled to less than 100 DEG C, then ingot casting is heated to 600-700 DEG C, insulation 5-6 hour, then naturally cools to room temperature, carries out machine-shaping;
(4) whole piston is carried out surfaces nitrided process, the nitriding treatment degree of depth >=0.3mm, to obtain final product;
Described nodulizing agent is made up of the raw material of following weight part: Ba1-1.6, Mg10-12, Ca 1-1.5, Si10-13, rare earth 2-3, Fe82-86; Preparation method is; By Ba powder, Mg powder, Ca powder, Si powder, rare earth mixing, add the iron powder of 1/3, in argon atmosphere, be heated to iron powder fusing, stir, build, pulverize, cross 10 mesh sieves, obtain powder; Residue iron powder is added crucible, described powder injection is sent into the central authorities of iron powder, in argon atmosphere, be heated to 1510-1520 DEG C, roll is rolled into the thin slice that thickness is 4-5mm, then be ground into the particle that particle diameter is less than 4mm, to obtain final product;
Described first nucleating agent is made up of the raw material of following weight part: La0.1-0.3, Mg3-4, Ca2-4, Mn1-2, Nb0.4-0.7, Si25-30, Fe71-75; Preparation method is, is mixed by metal-powder, grinds 10-20 minute, to obtain final product in argon atmosphere;
Described first nucleating agent is made up of the raw material of following weight part: Y0.1-0.3, Mg2-3, Ca3-5, Mn2-4, Sr0.5-0.7, Si29-35, Fe71-75; Preparation method is, is mixed by metal-powder, grinds 10-20 minute, to obtain final product in argon atmosphere.
Beneficial effect of the present invention
Inventive piston material has good corrosion resistance nature to soda acid, at high temperature has higher erosion resistance and temperature capacity, good toughness; Production method of the present invention, add the cracking resistance of foundry goods, add hardness and the abrasion resistance of piston face, effectively extend the work-ing life of piston, nodulizing agent of the present invention and nucleating agent can make the roundness of graphite better, the mechanical property of effective raising nodular iron casting, tensile strength is high.
Embodiment
A kind of hydraulic spanner nodular cast iron for piston material, the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Mn0.8-1.5, Cu0.03-0.07, Ti0.2-0.4, W0.05-0.2, Si0.58-0.80, NI2.6-3.2, S≤0.02, P≤0.02, all the other are Fe.
The production method of described hydraulic spanner nodular cast iron for piston material is:
(1) raw material is sent into smelting pot, at 1600 DEG C, after melting, detecting the content of each element in molten iron and adjusting each constituent content to meeting recipe requirements;
(2) nodulizing agent being equivalent to iron liquid weight 2.1% is poured into the side of dykes and dams in casting ladle, the first nucleating agent being equivalent to iron liquid weight 0.3% is covered on nodulizing agent equably, pour iron liquid, carry out spheroidizing and first time inoculation, pour residue iron liquid again, the second nucleating agent being equivalent to iron liquid weight 0.3% pours with stream, completes second time inoculation, cast, obtains ingot casting;
(3) ingot casting is heated to 1000 DEG C, be incubated 5.5 hours, hardening is cooled to 90 DEG C, then ingot casting is heated to 650 DEG C, is incubated 5.5 hours, then naturally cools to room temperature, carry out machine-shaping;
(4) whole piston is carried out surfaces nitrided process, the nitriding treatment degree of depth is 0.30mm, to obtain final product;
Described nodulizing agent is made up of the raw material of following weight part (kilogram): Ba1.3, Mg11, Ca 1.3, Si12, rare earth 2.5, Fe84; Preparation method is; By Ba powder, Mg powder, Ca powder, Si powder, rare earth mixing, add the iron powder of 1/3, in argon atmosphere, be heated to iron powder fusing, stir, build, pulverize, cross 10 mesh sieves, obtain powder; Residue iron powder is added crucible, described powder injection is sent into the central authorities of iron powder, in argon atmosphere, be heated to 1515 DEG C, roll is rolled into the thin slice that thickness is 4mm, then be ground into the particle that particle diameter is less than 4mm, to obtain final product;
Described first nucleating agent is made up of the raw material of following weight part (kilogram): La0.2, Mg3.5, Ca3, Mn1.5, Nb0.5, Si27, Fe73; Preparation method is, is mixed by metal-powder, grinds 15 minutes, to obtain final product in argon atmosphere;
Described first nucleating agent is made up of the raw material of following weight part (kilogram): Y0.2, Mg2.5, Ca4, Mn3, Sr0.6, Si32, Fe73; Preparation method is, is mixed by metal-powder, grinds 15 minutes, to obtain final product in argon atmosphere.
Experimental data:
After tested, tensile strength is 639MPa to the material of this embodiment, and unit elongation is 10.9%, and yield strength is 399MPa, and surface hardness is 190HBW, and toughness is 9.9J/ ㎡.
Claims (2)
1. a hydraulic spanner nodular cast iron for piston material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Mn0.8-1.5, Cu0.03-0.07, Ti0.2-0.4, W0.05-0.2, Si0.58-0.80, NI2.6-3.2, S≤0.02, P≤0.02, all the other are Fe.
2. the production method of hydraulic spanner nodular cast iron for piston material according to claim 1, is characterized in that:
(1) raw material is sent into smelting pot, at 1550-1650 DEG C, after melting, detecting the content of each element in molten iron and adjusting each constituent content to meeting recipe requirements;
(2) nodulizing agent being equivalent to iron liquid weight 2.0-2.2% is poured into the side of dykes and dams in casting ladle, the first nucleating agent being equivalent to iron liquid weight 0.3-0.4% is covered on nodulizing agent equably, pour iron liquid, carry out spheroidizing and first time inoculation, pour residue iron liquid again, the second nucleating agent being equivalent to iron liquid weight 0.25-0.35% pours with stream, completes second time inoculation, cast, obtains ingot casting;
(3) ingot casting is heated to 950-1050 DEG C, insulation 5-6 hour, hardening is cooled to less than 100 DEG C, then ingot casting is heated to 600-700 DEG C, insulation 5-6 hour, then naturally cools to room temperature, carries out machine-shaping;
(4) whole piston is carried out surfaces nitrided process, the nitriding treatment degree of depth >=0.3mm, to obtain final product;
Described nodulizing agent is made up of the raw material of following weight part: Ba1-1.6, Mg10-12, Ca 1-1.5, Si10-13, rare earth 2-3, Fe82-86; Preparation method is; By Ba powder, Mg powder, Ca powder, Si powder, rare earth mixing, add the iron powder of 1/3, in argon atmosphere, be heated to iron powder fusing, stir, build, pulverize, cross 10 mesh sieves, obtain powder; Residue iron powder is added crucible, described powder injection is sent into the central authorities of iron powder, in argon atmosphere, be heated to 1510-1520 DEG C, roll is rolled into the thin slice that thickness is 4-5mm, then be ground into the particle that particle diameter is less than 4mm, to obtain final product;
Described first nucleating agent is made up of the raw material of following weight part: La0.1-0.3, Mg3-4, Ca2-4, Mn1-2, Nb0.4-0.7, Si25-30, Fe71-75; Preparation method is, is mixed by metal-powder, grinds 10-20 minute, to obtain final product in argon atmosphere;
Described first nucleating agent is made up of the raw material of following weight part: Y0.1-0.3, Mg2-3, Ca3-5, Mn2-4, Sr0.5-0.7, Si29-35, Fe71-75; Preparation method is, is mixed by metal-powder, grinds 10-20 minute, to obtain final product in argon atmosphere.
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| CN201510239068.XA CN104878281A (en) | 2015-05-12 | 2015-05-12 | Spheroidal graphite cast iron material for hydraulic spanner piston and preparation method of spheroidal graphite cast iron material |
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| CN201510239068.XA CN104878281A (en) | 2015-05-12 | 2015-05-12 | Spheroidal graphite cast iron material for hydraulic spanner piston and preparation method of spheroidal graphite cast iron material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385936A (en) * | 2015-12-22 | 2016-03-09 | 合肥仲农生物科技有限公司 | High-temperature resisting and abrasion resisting cast iron material for grinding machine |
| CN106834893A (en) * | 2017-02-25 | 2017-06-13 | 喀左金牛铸造有限公司 | A kind of production technology of cast high-strength high-toughness spheroidal graphite cast-iron |
| CN108588548A (en) * | 2018-07-16 | 2018-09-28 | 佛山市高明康得球铁有限公司 | A kind of preparation method of heat-resisting spheroidal graphite cast-iron |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1506947A (en) * | 1974-11-30 | 1978-04-12 | Goetzewerke | Sealing strip for rotary piston engines |
| CN104498813A (en) * | 2014-12-10 | 2015-04-08 | 马鞍山市益华液压机具有限公司 | Heat-resistant material for hydraulic spanner piston and preparation method thereof |
-
2015
- 2015-05-12 CN CN201510239068.XA patent/CN104878281A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1506947A (en) * | 1974-11-30 | 1978-04-12 | Goetzewerke | Sealing strip for rotary piston engines |
| CN104498813A (en) * | 2014-12-10 | 2015-04-08 | 马鞍山市益华液压机具有限公司 | Heat-resistant material for hydraulic spanner piston and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385936A (en) * | 2015-12-22 | 2016-03-09 | 合肥仲农生物科技有限公司 | High-temperature resisting and abrasion resisting cast iron material for grinding machine |
| CN106834893A (en) * | 2017-02-25 | 2017-06-13 | 喀左金牛铸造有限公司 | A kind of production technology of cast high-strength high-toughness spheroidal graphite cast-iron |
| CN106834893B (en) * | 2017-02-25 | 2018-05-08 | 喀左金牛铸造有限公司 | A kind of production technology of cast high-strength high-toughness spheroidal graphite cast-iron |
| CN108588548A (en) * | 2018-07-16 | 2018-09-28 | 佛山市高明康得球铁有限公司 | A kind of preparation method of heat-resisting spheroidal graphite cast-iron |
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Application publication date: 20150902 |