CN105316471A - Surface modification treatment process for improving wear resistance of 45Mn2V4 steel - Google Patents
Surface modification treatment process for improving wear resistance of 45Mn2V4 steel Download PDFInfo
- Publication number
- CN105316471A CN105316471A CN201410291842.7A CN201410291842A CN105316471A CN 105316471 A CN105316471 A CN 105316471A CN 201410291842 A CN201410291842 A CN 201410291842A CN 105316471 A CN105316471 A CN 105316471A
- Authority
- CN
- China
- Prior art keywords
- laser
- 45mn2v4
- steel
- surface modification
- polishing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a surface modification treatment process for improving wear resistance of 45Mn2V4 steel. The process is characterized in that a laser treatment test is carried out with a 5 kW CO2 crossflow-type laser device with laser wavelength being 10.6 [mu]m. A mixed gas in a laser chamber is CO2, N2 and He. N2 or Ar is employed as a protective gas during laser quenching. A focus lens is employed in the test, wherein the spot diameter is 3 mm, the laser powder is 400 W and the scanning speed is 15 mm/s. The surface of the sample is coated by a SiO2 coating.
Description
Technical field
The present invention relates to the processing technology for surface modification of a kind of raising to 45Mn2V4 steel polishing machine.
Background technology
The development of chemical industry and power industry, facilitates again the expansion of steel alloy kind, so stainless steel and refractory steel has come out during this section.Nineteen twenty fritz Maurer (E.Maurer) has invented 18-8 type Stainless Acid Resistant Steel, and nineteen twenty-nine has occurred Fe-Cr-Al resistance wire in the U.S., and to nineteen thirty-nine, Germany brings into use austenitic heat-resistance steel in power industry.To the sixties after World War II, the mainly epoch of development of high strength steel and ultrahigh-strength steel, due to the needs that aircraft industry and rocketry develop, many high-strength steels and superstrength steel are there is, if precipitation hardenable high-strength stainless steel and various Hi-Stren steel etc. are its representational steel grades.After the sixties, many New Metallurgical Technique, particularly furnace outer refining technology is generally used, and steel alloy starts, to high purity, high precision and ultralow-carbon future development, to have occurred again the new steel grade such as maraging steel, super-purity ferrite stainless steel.What use in the world has thousands of steel alloy grades of steel, tens thousand of specifications, and the output of steel alloy accounts for 10% of steel ultimate production, is the important meals material that the development of the national economy and national defense construction use in a large number.
The strengthening mechanism of steel comprises dislocations strengthening, crystalline structure strengthening and solution strengthening, martensitic steel due to the complicacy of its structure, the strengthening mechanism final conclusion that neither one is unified so far.Refined crystalline strengthening can make the intensity of steel and toughness all be improved, and be not very clear to the understanding of " grain-size " that martensitic steel obdurability works, main crystal boundary type lath martensite being organized to strengthening effect has people to think packet size, and someone thinks slat dimension.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of raising to the processing technology for surface modification of 45Mn2V4 steel polishing machine, to obtain the 45Mn2V4 steel of polishing machine excellence.
Technical scheme of the present invention is: a kind of processing technology for surface modification improved 45Mn2V4 steel polishing machine, and laser treatment test adopts the CO of 5kW
2cross-flow type laser apparatus, optical maser wavelength 10.6 μm, in laser cavity, mixed gas is CO
2, N
2and He
2, during laser quenching, adopt N
2or Ar
2gas shielded test adopts condensing lens, and spot diameter is 3mm, and laser power is 400W, and sweep velocity is 15mm/s.
Specimen surface coats SiO
2coating.
A kind of processing technology for surface modification improved 45Mn2V4 steel polishing machine, plasma arc hardening equipment is DZ120, sweep velocity is 5m/min, scanning distance is 5mm, nozzle diameter is 2.5mm, and electric current is 69A, and scanning arc length is 4.0mm, argon flow amount is 0.32m3/h, and cooling water flow is 22L/min.
Beneficial effect of the present invention:
(1) wear resisting property on the steel alloy surface of employing plasma arc hardening technical finesse is slightly worse than the surface through Laser hardening, and under DRY SLIDING, average wear rate is 2 times of laser treatment, but is better than the situation of conventional quenching.Therefore, plasma arc hardening technology can be adopted to improve the wear resisting property on steel alloy surface.
(2) water-base cutting fluid lubrication is adopted can to improve the wear resisting property on steel alloy surface.
Accompanying drawing explanation
Fig. 1 is the relation between the abrasion loss of 45Mn2V4 and sliding distance.
Embodiment
1.1 test materialss and equipment
Sliding friction pair forms by 45Mn2V4/Q235 the dish that .45Mn2V4 makes diameter 34m, high 10mm, and respectively through laser reinforcing and plasma arc hardening process.Cold rolling Q235 makes the pin of diameter 3mm, high 20mm.Load gets 200N, and friction velocity is the CO that the test of 0.62m/s. laser treatment adopts 5kW
2cross-flow type laser apparatus, optical maser wavelength 10.6 μm, in laser cavity, mixed gas is CO
2, N
2and He
2, during laser quenching, adopt N
2or Ar
2gas shielded test adopts condensing lens, and spot diameter is 3mm, and laser power is 400W, and sweep velocity is 15mm/s.For making surface of test piece absorbing laser energy better, coat SiO on its surface
2coating.Plasma arc hardening equipment is DZ120, and sweep velocity is 5m/min, and scanning distance is 5mm, and nozzle diameter is 2.5mm, and electric current is 69A, and scanning arc length is 4.0mm, and argon flow amount is 0.32m3/h, and cooling water flow is 22L/min.
1.2 wearing test
Wearing test is coiled on pin friction wear testing machine in MPX-2000 and is carried out, and friction condition is respectively metal to-metal contact and cooling fluid lubrication.Cooling fluid adopts degradable water base machine tool cutting liquid. and employing precision is the mass loss before and after TG328-A analytical balance experiment with measuring of 0.01mg.Adopt 4 dish pins to join pair and carry out wearing test.After sample experience wear, dry up by acetone clean surface, balance takes mass loss, calculate abrasion loss, get its mean value as final test-results.Consider that load and sliding distance are to the combined influence of wearing test result, adopt the abrasion loss of average wear rate to metal to-metal contact and cutting fluid lubrication to contrast.
The lubrication of 2 water-base cutting fluids
In friction process, the employing of lubricating oil can improve abrasive conditions usually, improves the wear resisting property on surface.But in bar straightening process, the lubricating oil remaining in rebar surface can affect the bond stress of reinforcing bar and cement.Adopt degradable lathe water-base cutting fluid to substitute lubricating oil in this test and carry out wearing test.Under water-base cutting fluid lubricating condition, abrasion loss when 45Mn2V4 and Q235 joins pair and between sliding distance relation curve is as shown in Figure 1, as can be seen from the figure, the 45Mn2V4 abrasion loss of laser processing is basic and sliding distance is linear, and the 45Mn2V4 of plasma arc hardening abrasion loss when sliding distance is lower is relatively little, and sliding distance reaches abrasion loss after 1830m and increases very fast.Compared with the abrasion loss under DRY SLIDING, after adopting water-base cutting fluid lubrication, effectively can improve surface abrasion resistance.
Claims (3)
1. improve the processing technology for surface modification to 45Mn2V4 steel polishing machine, it is characterized in that: laser treatment test adopts the CO of 5kW
2cross-flow type laser apparatus, optical maser wavelength 10.6 μm, in laser cavity, mixed gas is CO
2, N
2and He
2, during laser quenching, adopt N
2or Ar
2gas shielded test adopts condensing lens, and spot diameter is 3mm, and laser power is 400W, and sweep velocity is 15mm/s.
2. a kind of processing technology for surface modification improved 45Mn2V4 steel polishing machine according to claim 1, is characterized in that: surface of test piece coats SiO2 coating.
3. a kind of processing technology for surface modification improved 45Mn2V4 steel polishing machine as claimed in claim 1, it is characterized in that: plasma arc hardening equipment is DZ120, sweep velocity is 5m/min, scanning distance is 5mm, nozzle diameter is 2.5mm, and electric current is 69A, and scanning arc length is 4.0mm, argon flow amount is 0.32m3/h, and cooling water flow is 22L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410291842.7A CN105316471A (en) | 2014-06-26 | 2014-06-26 | Surface modification treatment process for improving wear resistance of 45Mn2V4 steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410291842.7A CN105316471A (en) | 2014-06-26 | 2014-06-26 | Surface modification treatment process for improving wear resistance of 45Mn2V4 steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105316471A true CN105316471A (en) | 2016-02-10 |
Family
ID=55244788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410291842.7A Pending CN105316471A (en) | 2014-06-26 | 2014-06-26 | Surface modification treatment process for improving wear resistance of 45Mn2V4 steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105316471A (en) |
-
2014
- 2014-06-26 CN CN201410291842.7A patent/CN105316471A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gao | Improvement of fatigue property in 7050–T7451 aluminum alloy by laser peening and shot peening | |
| Mahmoudi et al. | Laser surface hardening of AISI 420 stainless steel treated by pulsed Nd: YAG laser | |
| Avilés et al. | Influence of laser polishing on the high cycle fatigue strength of medium carbon AISI 1045 steel | |
| Cong et al. | The thermal fatigue resistance of H13 steel repaired by a biomimetic laser remelting process | |
| CN104588963B (en) | Break repair technology for universal connecting rod of universal coupling | |
| Wu et al. | Role of butter layer in low-cycle fatigue behavior of modified 9Cr and CrMoV dissimilar rotor welded joint | |
| CN102791898A (en) | High-strength steel and high-strength bolt with excellent resistance to delayed fracture, and manufacturing method therefor | |
| Petan et al. | Effects of Laser Shock Peening on the Surface Integrity of 18% Ni Maraging Steel. | |
| Zhan et al. | Surface characteristic and wear resistance of QT-700-2 nodular cast iron after laser quenching combing with shot peening treatment | |
| CN104981556A (en) | Soft-nitrided induction-quenched steel component | |
| Hutasoit et al. | Fatigue life of laser clad hardfacing alloys on AISI 4130 steel under rotary bending fatigue test | |
| Fazarinc et al. | Thermal fatigue properties of differently constructed functionally graded materials aimed for refurbishing of pressure-die-casting dies | |
| Lv et al. | Effect of microshot peened treatment on the fatigue behavior of laser-melted W6Mo5Cr4V2 steel gear | |
| Song et al. | Fatigue crack growth behavior of Ni-Cr-Mo-V steel welded joints considering strength mismatch effect | |
| CN105651957A (en) | Method for assessing laser shot peening effect | |
| Sun et al. | Effect of annealing on microstructure and mechanical properties of laser deposited Co-285+ WC coatings | |
| Barr et al. | Role of deposition strategy and fill depth on the tensile and fatigue performance of 300 M repaired through laser directed energy deposition | |
| US20130047394A1 (en) | Solid state system and method for refurbishment of forged components | |
| Wang et al. | Research on laser quenching process of 20CrMnMo gears by finite element method and experiment | |
| CN101333911A (en) | Small caliber cold-drawing oil conduit and its processing method | |
| CN105618959A (en) | Novel SL-NiCrMo alloy material for laser welding and fusion cladding of MONEL-K500 alloy | |
| Lv et al. | Effects of discrete laser surface melting on the fatigue performance of 20CrMnTi steel gear | |
| Dewangan et al. | Metallographic Investigation on Postweld Heat‐Treated0. 21% C‐1020 Steel Plates Joined by SMAW Method | |
| Shao et al. | Role of stress in the high cycle fatigue behavior of advanced 9Cr/CrMoV dissimilarly welded joint | |
| CN105316471A (en) | Surface modification treatment process for improving wear resistance of 45Mn2V4 steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160210 |