CN1309187A - Anticavitation and antiwear steel for hydraulic machinery - Google Patents
Anticavitation and antiwear steel for hydraulic machinery Download PDFInfo
- Publication number
- CN1309187A CN1309187A CN 00110114 CN00110114A CN1309187A CN 1309187 A CN1309187 A CN 1309187A CN 00110114 CN00110114 CN 00110114 CN 00110114 A CN00110114 A CN 00110114A CN 1309187 A CN1309187 A CN 1309187A
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- steel
- anticavitation
- hydraulic machinery
- antiwear
- water
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 230000032683 aging Effects 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 4
- 238000007669 thermal treatment Methods 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 229910001566 austenite Inorganic materials 0.000 description 8
- 229910000734 martensite Inorganic materials 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 210000001787 dendrite Anatomy 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241000863032 Trieres Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
An anticavitation and antiwear steel for hydraulic machinery contains C (0.1-0.45 wt.%), Cr (15-22 wt.%), Mn (10-16 wt.%), Mo (0.5-3.0 wt.%), Ni (1-4 wt.%), N (0.1-0.45 wt.%) and Fe (the balance). It has two heat treating systems, one including solid-dissolving at 1050-1160 deg.C and water cooling; another including solid-dissolving and ageing at 1050-1160 deg.C, water cooling to 650-800 deg.C for 4-32hr and cooling in air. Its advantages are better machinability and excellent mechanical, antiwear and anticavitation performance.
Description
The present invention relates to the wear-and corrosion-resistant material, provide a kind of anti-cavitation erosion to resistance to wear especially and used steel.
Water machine (water turbine, water pump) except that the intensity of having relatively high expectations, good toughness plasticity, safe range of stress and manufacturing (smelting, casting, forging and pressing, thermal treatment, welding, mechanical workout) manufacturability, also requires to have good anti-cavitation corrosion, wearing and tearing, abrasion performance with steel.In addition, cost can not be too high.At present, water turbine mainly contains two classes with steel: soft steel, low alloy steel, and as Z20,30SiMn and 0Cr14Ni5Mo series low-carbon martensitic steels.Back one class steel begins to use existing two more than ten years, and the trend of increase is arranged in recent years.Preceding tens the unit water turbine in Three Gorges are crossed wet part and are just selected this class material manufacturing for use.0Cr14Ni5Mo is used for the water turbine in clear water power station and crosses the requirement that wet part can satisfy overhaul in 10 years, but does not satisfy the needs that high concentration of sediment power station water turbine is crossed the wet part anti scuffing far away.In the bigger Qingtongxia of sediment concentration, its anti-erosion performance and soft steel are suitable.In Ge Zhou Ba power plant, No. 15 machine operations are after 37000 hours, and blade water inlet end portion abraded quantity surpasses 16mm, goes out the every operation in waterside 1000 hours, the average attenuate 3.5mm of blade.In the power station of building, Three Gorges, because head height, flow velocity are fast, water turbine is crossed the abrasion problem of wet part will be above the Ge Zhou Ba.In recent years, both at home and abroad the water machine lays particular emphasis on improvement to 0Cr14Ni5Mo with the research of steel, and for example Beijing steel grinds total institute and developed ultralow-carbon S-135 (00Cr14Ni5Mo), and some units have also developed 16-5 and 17-4 etc., only trace is transferred alloying elements such as C, Ni, Cr, and the result is produced effects not too big.
The object of the present invention is to provide a kind of anticavitation and antiwear steel for hydraulic machinery, it has excellent mechanical property, wear resistance and excellent cavitation resistance when having good hot workability.
The invention provides a kind of anticavitation and antiwear steel for hydraulic machinery, it is characterized in that composition of steel following (weight percent):
C Cr Mn Mo Ni N Fe
0.1～0.45 15～22 10～16 0.5～3.0 1～4 0.1～0.45 surplus.
In addition, also can contain 0.005～0.05 rare earth Re in the steel provided by the present invention.
The present invention also provides two kinds of 1. solution treatment of heat treating regime of above-mentioned steel grade, and 1050～1160 ℃, water-cooled, 2. solid solution adds 1050～1160 ℃ of water-cooleds of timeliness, 650～800 ℃, 4～32 hours, air cooling.
Steel grade provided by the present invention is the metastable state austenite structure that austenite adds a little ferrite, under the identical situation of hardness, the metastable state austenite is better than martensitic stucture anti-erosion performance, this is because martensitic transformation takes place under impact force action (1) metastable austenite easily, hardness intensity is improved, generally can improve about 80%; (2) martensitic transformation causes that volume increases, and the surface produces compressive stress layer, and this stops crack nucleation and expansion; (3) austenite can be low than martensite fault, forms extended dislocation easily, and dislocation motion sees through crystal boundary easily, and crackle is difficult for forming core; (4) austenite lattice sliding system is more, and deformability is stronger than martensite, and the strengthening effect that distortion causes is big.In a word, the present invention propose with high strength, high toughness plasticity, low stacking fault energy, the research approach that the metastable state austenitic stainless steel is used for hydraulicefficiency machinery has novelty and creativeness; Under the cavitation wear working condition, " outer hard in tough " characteristic that " upper layer self-hardening " forms makes this steel be used for the hydraulicefficiency machinery flow passage components will to improve work-ing life greatly; In addition, solid solution adds timeliness thermal treatment with solid solution and has different anti-erosion performances, is the many a kind of selections of different applying working conditions.In addition, there is not martensitic transformation in the steel welding process of this tissue provided by the present invention, so no cold crack may.Though there is the possibility of HOT CRACK FOR WELDING P in austenitic steel because new steel grade is based on austenite, contain a little ferrite, ferritic phase can make the development of austenite phase dendrite be restricted, thus refinement crystal grain, and upset the dendrite direction.Ferritic phase has bigger solubleness to S, P simultaneously, and its segregation at crystal boundary is reduced, and is beneficial to preventing thermal crack.Therefore new steel grade has good heat resistanceheat resistant crack performance.
Below in conjunction with embodiment in detail the present invention is described in detail.
Embodiment 1
With the smelting of normal pressure induction furnace, ingot casting, in 1200～900 ℃ of temperature ranges, forge, and carry out appropriate heat treatment, process anti-cavitation corrosion wearing and tearing and pulling force test specimen.Cavitation test carries out on the rotating disk instrument of China Water Resources ﹠ Hydropower Science Research Institute, and wearing and tearing and abrasion test are carried out on homemade rotary type sand erosion trier, when carrying out abrasion test, do the cavitation source with Φ 15mm through hole, and the husky content in the Yellow River is 110Kg/m
2Material composition and test-results are listed in table 1.As known from Table 1, the new steel grade hardness of development is all low than 0Cr14Ni5Mo, and is low approximately by about 30%, but anti-cavitation corrosion, wearing and tearing and abrasion performance are all good than 0Cr14Ni5Mo.
The anti-gas of table 1 material heat treatment state major ingredient % σ b σ s σ Ar is wear-resistant
No. 1 1060 ℃ of 1h water-cooleds, 0.20 17 13 1.5 2.0 0.25 855 469 62-2.0 of C Cr Mn Mo Ni N MPa MPa % J erosion property new material-No. 2 1140 ℃ of 1h water-cooleds, 0.35 20 12 2.5 3.0 0.35 1,035 750 40-1.7 1.67 of No. 2 1140 ℃ of 1h water-cooleds of new material 0.35 20 12 2.5 3.0 0.35 990 550 60 336 7.5 1.28-1.40 new material
1000 ℃ of air coolings of 750 ℃ of 10h0Cr13Ni5Mo 0.04 13.1 0.7 0.7 5.3-840 810 19 108 1.0 1.0
580 ℃ of 2h novel anti abrasions were used for blade shirt rim, the Sanmenxia Gorge first with steel in 1994.Through two flood seasons and a clear water phase operation, the shirt rim has to a certain degree to be destroyed.Compare with 0Cr14Nio5Mo surfacing powdered alloy, the anti scuffing effect is far better, and the latter bores a hole the part after a flood season.
Embodiment 2
With the smelting of normal pressure induction furnace, ingot casting, to forge in 1200～900 ℃ of temperature ranges, composition and mechanical property see Table 2.
Table 2 heat (batch) number chemical analysis % mechanical property C Cr Mn Mo Ni N S P Re σ b MPa σ s MPa σ %1 0.12 17 12 12 0.25＜0.03＜0.03 0.015 810 435 642 0.20 18 12 1.5 2 0.25＜0.03＜0.03 0.025 855 469 623 0.28 19 12 2.0 2.5 0.28＜0.03＜0.03 0.025 920 505 614 0.35 19 13 2.5 3.0 0.35＜0.03＜0.03 0.04 990 550 605 0.40 20 14 2.5 3.0 0.40＜0.03＜0.03 0.08 1,040 610 58
Claims (4)
1. anticavitation and antiwear steel for hydraulic machinery is characterized in that composition of steel following (weight percent):
C Cr Mn Mo Ni N Fe
0.1～0.45 15～22 10～16 0.5～3.0 1～4 0.1～0.45 surplus.
2. according to the described anticavitation and antiwear steel for hydraulic machinery of claim 1, it is characterized in that: contain 0.005～0.05 rare earth Re in the steel.
3. the thermal treatment of the described anticavitation and antiwear steel for hydraulic machinery of claim 1. it is characterized in that: 1050～1160 ℃ solution treatment, water-cooled.
4. according to the thermal treatment of the described anticavitation and antiwear steel for hydraulic machinery of claim 1, it is characterized in that: carry out ageing treatment after the solution treatment, 650～800 ℃ of temperature, 4～32 hours time, air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110114 CN1114713C (en) | 1999-03-26 | 2000-02-16 | Anticavitation and antiwear steel for hydraulic machinery |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99112793.5 | 1999-03-26 | ||
| CN99112793 | 1999-03-26 | ||
| CN 00110114 CN1114713C (en) | 1999-03-26 | 2000-02-16 | Anticavitation and antiwear steel for hydraulic machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1309187A true CN1309187A (en) | 2001-08-22 |
| CN1114713C CN1114713C (en) | 2003-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00110114 Expired - Fee Related CN1114713C (en) | 1999-03-26 | 2000-02-16 | Anticavitation and antiwear steel for hydraulic machinery |
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| Country | Link |
|---|---|
| CN (1) | CN1114713C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424976A (en) * | 2011-11-28 | 2012-04-25 | 湖南志辉矿山机械有限公司 | Heat treatment process of down-the-hole hammer piston |
| CN103912436A (en) * | 2014-03-28 | 2014-07-09 | 云南电力试验研究院（集团）有限公司电力研究院 | Process for improving cavitation erosion resistance of turbine water passing component |
| CN106119665A (en) * | 2016-06-24 | 2016-11-16 | 国网安徽省电力公司黄山供电公司 | A kind of water wheels material of TRT based on water-energy generating electricity and preparation method thereof |
| CN106636927A (en) * | 2016-10-13 | 2017-05-10 | 南京创贝高速传动机械有限公司 | Production process of cooling water pump for high-speed gear box |
| CN108950386A (en) * | 2018-06-29 | 2018-12-07 | 府谷县旭丽机电技术有限公司 | A kind of heat-resistant anticorrosive metallic magnesium refining pot and preparation method thereof |
-
2000
- 2000-02-16 CN CN 00110114 patent/CN1114713C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424976A (en) * | 2011-11-28 | 2012-04-25 | 湖南志辉矿山机械有限公司 | Heat treatment process of down-the-hole hammer piston |
| CN103912436A (en) * | 2014-03-28 | 2014-07-09 | 云南电力试验研究院（集团）有限公司电力研究院 | Process for improving cavitation erosion resistance of turbine water passing component |
| CN106119665A (en) * | 2016-06-24 | 2016-11-16 | 国网安徽省电力公司黄山供电公司 | A kind of water wheels material of TRT based on water-energy generating electricity and preparation method thereof |
| CN106636927A (en) * | 2016-10-13 | 2017-05-10 | 南京创贝高速传动机械有限公司 | Production process of cooling water pump for high-speed gear box |
| CN108950386A (en) * | 2018-06-29 | 2018-12-07 | 府谷县旭丽机电技术有限公司 | A kind of heat-resistant anticorrosive metallic magnesium refining pot and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1114713C (en) | 2003-07-16 |
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