CN1077909C - Powder-type high-molecular paint and its coating to resist oligodynamic fatigue - Google Patents
Powder-type high-molecular paint and its coating to resist oligodynamic fatigue Download PDFInfo
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- CN1077909C CN1077909C CN98109880A CN98109880A CN1077909C CN 1077909 C CN1077909 C CN 1077909C CN 98109880 A CN98109880 A CN 98109880A CN 98109880 A CN98109880 A CN 98109880A CN 1077909 C CN1077909 C CN 1077909C
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Abstract
The present invention relates to a powder-shaped macromolecule coating material used for fretting fatigue protective coating layers. The powder-shaped macromolecule coating material comprises carboxyl polyester resin, isocyanurate(TGIC) basal body resin, polyester and solid lubricants, wherein the polyester is used as flatting agents. The powder type macromolecule coating material can be coated on the surfaces of high tensile steel wires used for manufacturing metal cord cables or steel strands for forming macromolecule fretting fatigue protective coating layers.
Description
The present invention relates to powder-type high-molecular paint and, be specifically related to be used for the polymer fretting fatigue protective coating of metal cable by its fretting fatigue protective coating that forms.
Various high strength cables are used increasingly extensive on engineering, and the particularly construction of modern cable-stayed bridge more demonstrates the importance of high strength cable wire.Yet bridge cable and wireline are similar, and the network contact that exists between the steel wire contacts with line, causes the generation of fretting fatigue.Though the cable-stayed bridge fast development, the suspension cable mass production uses, and the FATIGUE FRACTURE PROBLEMS to the bridge stay cable steel wire does not cause enough attention as yet up to now, does not see the report of the fretting fatigue Protective Research that pair suspension cable high-tensile steel wires are arranged yet.
The at present domestic High Tensile Steel Wire that generally is used to make suspension cable is the galvanized steel wire of home-made drawn wire and import.Metallographic examination proves that the surface galvanizing layer of galvanized steel wire combines with metallic matrix well, flawless, hole and defective.It is inside and outside two-layer that the zinc coating section shows that it is divided into, and skin is softer, and internal layer is harder, and essence is to have formed zinc-iron alloy.The heart portion of metallic matrix and the tissue on top layer are mainly tempered martensite and a small amount of granular carbide.The average microhardness on top layer is lower than heart portion.The top layer of drawn wire is identical with core structure, also is tempered martensite and a small amount of granular carbide, and textura epidermoidea's microhardness is then a little more than heart portion.
The present inventor has carried out fretting fatigue testing research to galvanized steel wire and drawn wire, has designed and manufactured experimently multiple polymer fretting fatigue protective coating with drawn wire of IP prospecting.Prove that through fretting fatigue testing polymeric powder coating of the present invention is obvious in the fretting fatigue aspect of performance effect of improving high-tensile steel wires.
The object of the present invention is to provide a kind of powder-type high-molecular paint that can be used as the fretting fatigue protective coating and this coating is coated in the polymer fretting fatigue protective coating that forms in order to the high-tensile steel wires surface of making metal cable or steel strand.
The powder-type high-molecular paint that can be used for the fretting fatigue protective coating of the present invention contains carboxyl polyester resin and triglycidyl isocyanurate (TGIC) matrix resin, is used as the polyester and the solid lubricant of flow agent, the content of described carboxyl polyester resin is 55-70 weight %, TGIC is 4-7 weight %, amount of polyester as flow agent is 6-10 weight %, the content of described solid lubricant is 13-35 weight %, and described solid lubricant comprises 3-18 weight %TiO
2And be selected from polytetrafluoroethylene (PTFE), graphite, MoS
2, Mo powder and MoO
3In at least two kinds, its content is respectively 0-10 weight % polytetrafluoroethylene (PTFE), 0-12 weight % graphite, 0-10 weight %MoS
2, 0-12 weight %Mo powder, 0-12 weight %MoO
3, the gross weight of equal coating based.Also can contain a small amount of other auxiliary agent in the described coating.
Mechanically mixing such as carboxyl polyester resin, TGIC, solid lubricant and flow agent is even, then through forcing machine fusion homogenizing, be crushed to again about 140 orders.These electrostatic powder sprayings to steel wire, through 10-15 minute film-forming, are promptly obtained fretting fatigue protective coating of the present invention under 180 ℃-200 ℃ temperature.The thickness of this coating is about 0.06mm.
Fig. 1 is the fretting fatigue testing curve of various test steel wires.
Fig. 2 has shown the pattern of steel wire fretting fatigue fracture.
Fig. 3 is the frictional coefficient of various test steel wire fretting wearing and tearing and the change curve of system line abrasion loss.
The curing reaction formula of carboxyl polyester resin/triglycidyl isocyanurate system is:
This shows that the end carboxyl of mylar and the reaction of the epoxide group of TGIC form the 3 D cross-linked structure of ternary. Because the parent nucleus of TGIC is the triazine ring of stable performance, therefore such coating has outstanding heat-resisting, ageing-resistant performance and mechanical and physical performance preferably, and its adhesive strength is high, the excellent performances such as shock resistance, bending.
Polymeric powder coating of the present invention is measured through applying standard jig, and its performance reaches the quality requirement of ornamental general powdery paints.
Figure 1 shows that the various test steel wires fretting fatigue S-N curve of (comprising the steel wire of processing through macromolecule fretting fatigue protective coating of the present invention). As seen from the figure, the fretting fatigue performance of zinc-coated wire and (cold-)drawn (steel)wire is without substantial difference. When higher stress width of cloth 519MPa, the life-span of zinc-coated wire slightly is longer than (cold-)drawn (steel)wire, but in the other parts of S-N curve, its performance is slightly poorer than again (cold-)drawn (steel)wire. Both are 107Inferior circulation time, fatigue strength is all 260MPa, is equivalent to approximately 15% of former steel wire tensile strength. The coating of powder-type high-molecular paint of the present invention can make steel wire anti-fretting fatigue performance be improved significantly, particularly under 346 to 519MPa the higher stress width of cloth, the untreated (cold-)drawn (steel)wire of fatigue life ratio prolongs several times. Best is under the higher stress width of cloth of 519MPa, and its fatigue life ratio (cold-)drawn (steel)wire improves more than 10 times. Passing through 107Circulation time, Fretting Fatigue Strength reaches 433MPa, has improved more than 60% than (cold-)drawn (steel)wire, and this intensity is equivalent to 25% of former steel wire tensile strength.
Fatigue fracture to the test steel wire shows do failure analysis, no matter be drawn wire or galvanized steel wire, or the steel wire of handling with polymer fretting fatigue protective coating of the present invention, one end fracture has the protrusion position, is called ligulate.The other end fracture then leaves corresponding depression position.This ligule fracture is not to be accidental the appearance, but one of feature of fretting fatigue.It is to form under the Synthesis of the tangential stress that applied stress, clamping stress and oligodynamics produce.Crackle to become the direction expansion at certain inclination angle with specimen surface, clamps the stress and the tangential stress zone of influence in case crackle is crossed at first, promptly turns to and adds the vertical direction of axial circulation stress and continue expansion, so produce the ligulate fracture apperance near tired source.
As shown in Figure 2, fracture surface of sample can be divided into four zones under electron microscopic observation, the firstth, tired source region, shown in Fig. 2 (a), this district significantly is oxidized to feature to have, can be observed some along crystalline substance fracture and secondary crackle, show that there is the intervention of intensive corrosive nature in the crack initiation stage, stress intensity is very high.When crackle entered the expansion area, above-mentioned phenomenon just died down, and can see tiny secondary crackle when higher multiple, and shown in Fig. 2 (b), at this moment crackle turns to, and oligodynamics are inoperative to crack propagation.When crack propagation arrived the limited proportionality, shown in Fig. 2 (c), stress intensity increased rapidly, and secondary crackle obviously enlarges, and main crackle is near unstability.Then be the final fracture district, it is 45 ° a shear lip, and the pattern of fracture reflects the low fracture toughness property feature of material, and the diameter of its dimple is also very tiny, shown in Fig. 2 (d).
The effect that behind the surface-coated of drawn wire polymer fretting fatigue of the present invention protective coating, has tangible anti-fretting fatigue.The key of fretting fatigue protection is to protect the drawn wire surface to exempt from fretting damage or make it by the polymeric solid slip coating to alleviate.The menu of coating is present: contacting between the one, isolation experiment steel wire and bridge type sample, and make steel wire directly not be subjected to oligodynamics, avoid the Steel Wire Surface fretting damage; Its two, when polymeric coating layer wearing and tearing gradually under oligodynamics, when Steel Wire Surface was subjected to the oligodynamics of directly contact, the surface damage to steel wire had been alleviated in polymkeric substance transfer film and residual coated material performance solid lubrication effect.Obviously, polymeric coating layer depends on abrasion property and solid lubrication characteristic to the fretting fatigue protection effect.Therefore, play the significant more polymeric coating layer of fretting fatigue protective effect, its frictional coefficient under the fretting wear effect is more little with wearing and tearing.
Fig. 3 is that various test steel wires (comprising the steel wire of handling through fretting fatigue protective coating of the present invention) are tested resulting coefficientoffriction and system line abrasion loss W between the coating of the same race mill is carried out fretting wear
1Change curve.From Fig. 3 (c) as seen, coating of the present invention in fine motion for some time on-test, its μ and W
1All quite low, show that coating of the present invention isolated contacting between steel wire and the steel wire, oligodynamics are between coating and coating, and the wearing and tearing along with coating increase μ and W then
1All fast rise, the at this moment MoS in the coating
2Still on frictional interface, play certain antifriction function with solid lubricants such as graphite.Compare with galvanized steel wire with drawn wire, coating of the present invention has tangible wear-resistant protection effect to steel wire, and the fretting damage that the steel wire body is subjected to is significantly delayed and alleviates.Therefore, the steel wire fretting fatigue strength performance that contains coating of the present invention is far superior to drawn wire and galvanized steel wire.By Fig. 3 (c) as seen, the frictional coefficient of coating of the present invention is more steady, and μ has only about 0.19, and it is also lower to wear and tear, W
1Only be about 40 μ m.Obviously, in the coating of the present invention PTFE at MoO
3Can play excellent solid lubrication effect under the condition that exists, reduce frictional coefficient significantly, also alleviate the wearing and tearing of coating simultaneously, the steel wire body is not worn.After coating of the present invention was tested through fretting wear, the mill spot is difficult to be differentiated, and does not see that more the metallic surface of coating shedding and steel wire is exposed, and demonstrates the anti-fretting wear characteristic that coating of the present invention has excellence.The anti-fretting wear of coating of the present invention may be because vibrin is with the synergistic effect of the film forming high strength adhesion effect of powder-type melting and solidification in stronger solid lubricant effect of PTFE and the coating, the antistick of PTFE, the function of low friction had both been brought into play, guarantee the bonding that whole coating and Steel Wire Surface are firm again, thereby make that coating is difficult for being worn.
The present invention is described in further detail below by specific embodiment.But should be understood that scope of the present invention is not limited to these specific embodiments.
Embodiment 1-8
With the carboxyl polyester resin (product of magnificent good chemical industry company limited, article number is SP-2400), TGIC, solid lubricant and as the polyester of the flow agent (product of magnificent good chemical industry company limited, article number is SP-3188) etc. mechanically mixing even, the consumption of above-mentioned each component is listed in the table 1.Through forcing machine fusion homogenizing, be crushed to again about 140 orders then.These electrostatic powder sprayings to steel wire, through 10-15 minute film-forming, are promptly obtained fretting fatigue protective coating of the present invention under 180 ℃-200 ℃ temperature.The thickness of this coating is about 0.06mm.
Table 1 (used unit is weight percentage in the table)
| The embodiment numbering | Carboxyl polyester resin | TGIC | The polyester flow agent | TiO 2 | PTFE | Graphite | MoS 2 | The Mo powder | MoO 3 |
| 1 | 55 | 4.0 | 6.0 | 18 | 3 | 0 | 2 | 0 | 12 |
| 2 | 60 | 5.0 | 7.0 | 10 | 10 | 2 | 0 | 0 | 6 |
| 3 | 62 | 5.5 | 7.5 | 7 | 0 | 6 | 0 | 12 | 0 |
| 4 | 65 | 6.0 | 8.0 | 6 | 5 | 0 | 0 | 0 | 10 |
| 5 | 66 | 6.0 | 8.0 | 5 | 0 | 10 | 5 | 0 | 0 |
| 6 | 68 | 6.5 | 8.5 | 3 | 0 | 12 | 2 | 0 | 0 |
| 7 | 69 | 7.0 | 9.0 | 3 | 2 | 0 | 10 | 0 | 0 |
| 8 | 70 | 7.0 | 10 | 3 | 0 | 4 | 0 | 5 | 1 |
The test example
Drawn wire, galvanized steel wire and the steel wire that applies polymer fretting fatigue protective coating of the present invention are carried out fretting fatigue testing.The test steel wire is directly cut into the long sample of 200mm.Oligodynamics are produced by a pair of bridge type sample, and this sample material is 45 steel, and quenching and tempering hardness is 291HV.The two ends of bridge type sample have 120 ° V-type groove, with stress loop with its clamping on the periphery of sample, be the line contact form.Adjust stress loop reaching desired contact load, in this test with this load stuck-at-80kNm
-1Fretting fatigue testing carries out on PLG-10 type HF fatigue testing machine.The fine motion amplitude changes because of the axial circulation load in when test, and its numerical value is at the 7-21 mu m range.Test is carried out in atmospheric environment, cycle stress ratio R=0.1, and frequency is about 108Hz.Adopt the fatigue loading condition of determining in each test, till near the repeated stress failure bridge type sample contact site, trier writes down the fretting fatigue life-span automatically up to steel wire, i.e. cycle index N.Test-results as shown in Figure 1.
As seen from Figure 1, the fretting fatigue performance of galvanized steel wire and drawn wire does not have substantial difference.When higher stress width of cloth 519MPa, the life-span of galvanized steel wire is longer than drawn wire slightly, but in the other parts of S-N curve, its performance is slightly poorer than drawn wire again.Both are 10
7Inferior circulation time, fatigue strength is all 260MPa, is equivalent to 15% of former steel wire tensile strength approximately.The coating of powder-type high-molecular paint of the present invention can make steel wire anti-fretting fatigue performance be improved significantly, particularly under 346 to 519MPa the higher stress width of cloth, the untreated drawn wire of fatigue life ratio prolongs several times.Best is under the higher stress width of cloth of 519MPa, and its fatigue life ratio drawn wire improves more than 10 times.Passing through 10
7Circulation time, fretting fatigue intensity reaches 433MPa, has improved more than 60% than drawn wire, and this intensity is equivalent to 25% of former pulverizing tensile strength.
Claims (3)
1. powder-type high-molecular paint, it contains carboxyl polyester resin and triglycidyl isocyanurate matrix resin, is used as the polyester and the solid lubricant of flow agent, the content of described carboxyl polyester resin is 55-70 weight %, triglycidyl isocyanurate is 4-7 weight %, amount of polyester as flow agent is 6-10 weight %, the content of described solid lubricant is 13-35 weight %, all the gross weight of coating based.
2. coating as claimed in claim 1 is characterized in that described solid lubricant comprises 3-18 weight %TiO
2And be selected from tetrafluoroethylene, graphite, MoS
2, Mo powder and MoO
3In at least two kinds, its content is respectively 0-10 weight % tetrafluoroethylene, 0-12 weight % graphite, 0-10 weight %MoS
2, 0-12 weight %Mo powder, 0-12 weight %MoO
3, the gross weight of equal coating based.
3. powder-type high-molecular paint as claimed in claim 1 is coated in the polymer fretting fatigue protective coating that forms in order to the high strength guiding principle silk surface of making metal cable or steel strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98109880A CN1077909C (en) | 1998-06-10 | 1998-06-10 | Powder-type high-molecular paint and its coating to resist oligodynamic fatigue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98109880A CN1077909C (en) | 1998-06-10 | 1998-06-10 | Powder-type high-molecular paint and its coating to resist oligodynamic fatigue |
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| Publication Number | Publication Date |
|---|---|
| CN1238363A CN1238363A (en) | 1999-12-15 |
| CN1077909C true CN1077909C (en) | 2002-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98109880A Expired - Fee Related CN1077909C (en) | 1998-06-10 | 1998-06-10 | Powder-type high-molecular paint and its coating to resist oligodynamic fatigue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015016322A1 (en) * | 2013-07-31 | 2015-02-05 | ミネベア株式会社 | Thermosetting resin composition, sliding member and method for producing sliding member |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167938B (en) * | 2011-02-18 | 2013-03-20 | 中钢集团郑州金属制品研究院有限公司 | Coating for processing martensite stainless steel wires |
| CN102108249A (en) * | 2011-03-23 | 2011-06-29 | 浙江超浪新材料有限公司 | Bend-resistance powder coating |
| CN111961837A (en) * | 2020-08-13 | 2020-11-20 | 大连理工大学 | Fretting fatigue resisting protection method based on composite modification of laser shock and coating lubrication |
| CN116875171A (en) * | 2023-08-23 | 2023-10-13 | 山东千江粉末科技有限公司 | Low-friction-coefficient powder coating and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5038733A (en) * | 1973-08-10 | 1975-04-10 | ||
| CN85102881A (en) * | 1985-04-15 | 1986-10-15 | 布亚格斯特 | Concrete cable and manufacturing technique thereof and device |
| CN1089278A (en) * | 1992-12-31 | 1994-07-13 | 兰州铁路局科技开发中心 | Solid friction agent between wheel ﹠ rail |
-
1998
- 1998-06-10 CN CN98109880A patent/CN1077909C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5038733A (en) * | 1973-08-10 | 1975-04-10 | ||
| CN85102881A (en) * | 1985-04-15 | 1986-10-15 | 布亚格斯特 | Concrete cable and manufacturing technique thereof and device |
| CN1089278A (en) * | 1992-12-31 | 1994-07-13 | 兰州铁路局科技开发中心 | Solid friction agent between wheel ﹠ rail |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015016322A1 (en) * | 2013-07-31 | 2015-02-05 | ミネベア株式会社 | Thermosetting resin composition, sliding member and method for producing sliding member |
| JP6039809B2 (en) * | 2013-07-31 | 2016-12-07 | ミネベア株式会社 | Thermosetting resin composition, sliding member, and manufacturing method of sliding member |
| US10451111B2 (en) | 2013-07-31 | 2019-10-22 | Minebea Mitsumi Inc. | Thermosetting resin composition, sliding member and method for producing sliding member |
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| Publication number | Publication date |
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| CN1238363A (en) | 1999-12-15 |
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