CN104313500A - Steel for high-strength corrosion-resistant reinforcing steel bar containing rare earth elements and heat treatment technology thereof - Google Patents
Steel for high-strength corrosion-resistant reinforcing steel bar containing rare earth elements and heat treatment technology thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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Abstract
The invention discloses steel for a high-strength corrosion-resistant reinforcing steel bar containing rare earth elements and a heat treatment technology thereof. The steel comprises the following chemical compositions by mass percent: 0.02-0.05% of C, 5.3-5.6% of Ni, 2.47-2.49% of Cr, 1.23-1.26% of Si, 2.35-2.38% of Mn, 2.8-3.2% of Cu, o.26-0.28% of V, 0.31-0.38% of Mo, 0.036-0.038% of P, 0.65-0.68% of W, 1.15-1.18% of rare earth elements and the balance of Fe. The steel for the high-strength corrosion-resistant reinforcing steel bar containing rare earth elements is high in strength, long in service life, low in production cost, simple in heat treatment technology and high in working efficiency, the corrosion resistance, oxidation resistance and high temperature resistance are obviously improved, the design requirement can be reached by reducing the using amount of steel in the application, and the safety is high.
Description
Technical field
The present invention relates to high-strength corrosion-resistant steel bar steel, specifically a kind of high-strength corrosion-resistant steel bar steel containing rare earth element and thermal treatment process thereof.
Background technology
Steel being widely used in building trade, is particularly useful for span large, baroque supporting role, its importance is self-evident, it is low that but current existing steel exists intensity, and work-ing life is short, and in practice process, at the easy rust corrosion of ground square steel that environment is more severe, and its antioxidant property is bad, and work-ing life is short, adds cost, and its security can be reduced after long-time, produce potential safety hazard.
Summary of the invention
Technical problem to be solved by this invention is, for the shortcoming of above prior art, a kind of high-strength corrosion-resistant steel bar steel containing rare earth element and thermal treatment process thereof are proposed, not only intensity is high to be somebody's turn to do the high-strength corrosion-resistant steel bar steel containing rare earth element, long service life, production cost is low, thermal treatment process is simple, working efficiency is high, and corrosion resistance, antioxidant property and resistance to elevated temperatures significantly improve, the consumption that can reduce steel in utilization just can reach its design requirements, reduces the complexity of structure, reduce costs, security is high.
In order to solve the problems of the technologies described above, technical scheme of the present invention is achieved in the following ways: a kind of high-strength corrosion-resistant steel bar steel containing rare earth element, and Chemical Composition is by mass percentage: C:0.02-0.05%, Ni:5.3-5.6%, Cr:2.47-2.49%, Si:1.23-1.26%, Mn:2.35-2.38%, Cu:2.8-3.2%, V:0.26-0.28%, Mo:0.31-0.38%, P:0.036-0.038%, W:0.65-0.68%, rare earth element: 1.15-1.18%, surplus is Fe;
Compound rare-earth is by mass percentage: La:3.2-3.5%, Gd:6.5-6.8%, Pr:12.5-14.5%, Er:16-18%, Ho:5.8-6.5%, Nd:13.5-13.9%, Sm:14.8-15.3%, Lu:10.5-10.8%, and surplus is Yb.
Present invention also offers a kind of high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element, the method is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and is heated to 1080-1100 DEG C, insulation 4-6h, then adopt water-cooled to be cooled to 720-730 DEG C with the speed of 16-20 DEG C/s, then use oil cooling to be cooled to 280-300 DEG C with 12-14 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 625-638 DEG C, insulation 1-2h, is cooled to room temperature by steel water coolant with the speed of 8-10 DEG C/s;
Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 760-780 DEG C, is incubated 10-15min after temperature; First time tempering again: Heating temperature is 790-810 DEG C, is incubated 20-25min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 850-860 DEG C, after temperature, be incubated 20-30min, then adopt water-cooled to be combined with air cooling, first adopt water-cooled, with the rate of cooling of 10-12 DEG C/s, molten steel is chilled to 500-520 DEG C, then air cooling is to 280-310 DEG C, then adopts water-cooled, with the rate of cooling of 5-8 DEG C/s, steel is chilled to room temperature;
Step (3): steel is put into vacuum oven, elder generation to 1000-1050 DEG C, is incubated 4-5h with the heating rate of 18-25 DEG C/s, then adopt and blow helium gas cooling, speed of cooling is 7-9 DEG C/s, is cooled to 480-490 DEG C, insulation 35-40min, then water-cooled is cooled to room temperature with 8-10 DEG C/s speed;
Step (4): use oily clean surface, then put into drying oven, drying temperature is 100-150 DEG C, and time of drying is 5-8h, and then air cooling is to room temperature;
Step (5): UT (Ultrasonic Testing) inspection and inspection size.
The technical scheme that the present invention limits further is:
The aforesaid high-strength corrosion-resistant steel bar steel containing rare earth element, Chemical Composition is by mass percentage: C:0.02%, Ni:5.3%, Cr:2.47%, Si:1.23%, Mn:2.35%, Cu:2.8%, V:0.26%, Mo:0.31%, P:0.036%, W:0.65%, rare earth element: 1.15%, surplus is Fe; Rare earth element is by mass percentage: La:3.2%, Gd:6.5%, Pr:12.5%, Er:16%, Ho:5.8%, Nd:13.5%, Sm:14.8%, Lu:10.5%, and surplus is Yb.
The aforesaid high-strength corrosion-resistant steel bar steel containing rare earth element, Chemical Composition is by mass percentage: C:0.05%, Ni:5.6%, Cr:2.49%, Si:1.26%, Mn:2.38%, Cu:3.2%, V:0.28%, Mo:0.38%, P:0.038%, W:0.68%, rare earth element: 1.18%, surplus is Fe; Rare earth element is by mass percentage: La:3.5%, Gd:6.8%, Pr:14.5%, Er:18%, Ho:6.5%, Nd:13.9%, Sm:15.3%, Lu:10.8%, and surplus is Yb.
The aforesaid high-strength corrosion-resistant steel bar steel containing rare earth element, Chemical Composition is by mass percentage: C:0.03%, Ni:5.5%, Cr:2.48%, Si:1.25%, Mn:2.37%, Cu:2.9%, V:0.27%, Mo:0.35%, P:0.032%, W:0.67%, rare earth element: 1.16%, surplus is Fe; Rare earth element is by mass percentage: La:3.3%, Gd:6.7%, Pr:12.8%, Er:17%, Ho:6.2%, Nd:13.8%, Sm:14.9%, Lu:10.6%, and surplus is Yb.
The aforesaid high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element, this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1080 DEG C, insulation 4h, then adopts water-cooled to be cooled to 720 DEG C with the speed of 16 DEG C/s, then uses oil cooling to be cooled to 280 DEG C with 12 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 625 DEG C, insulation 1h, is cooled to room temperature by steel water coolant with the speed of 8 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 760 DEG C, is incubated 10min after temperature; First time tempering again: Heating temperature is 790 DEG C, is incubated 20min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 850 DEG C, after temperature, be incubated 20min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 10 DEG C/s, molten steel to be chilled to 500 DEG C, then air cooling to 280 DEG C, then adopts water-cooled, with the rate of cooling of 5 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1000 DEG C of 18 DEG C/s, insulation 4h, then adopt and blow helium gas cooling, speed of cooling is 7 DEG C/s, is cooled to 480 DEG C, insulation 35-40min, and then water-cooled is cooled to room temperature with 8-10 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 100 DEG C, and time of drying is 5-8h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
The aforesaid high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element, this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1100 DEG C, insulation 6h, then adopts water-cooled to be cooled to 730 DEG C with the speed of 20 DEG C/s, then uses oil cooling to be cooled to 300 DEG C with 14 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 638 DEG C, insulation 2h, is cooled to room temperature by steel water coolant with the speed of 10 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 780 DEG C, is incubated 15min after temperature; First time tempering again: Heating temperature is 810 DEG C, is incubated 25min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 860 DEG C, after temperature, be incubated 30min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 12 DEG C/s, molten steel to be chilled to 520 DEG C, then air cooling to 310 DEG C, then adopts water-cooled, with the rate of cooling of 8 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1050 DEG C of 25 DEG C/s, insulation 5h, then adopt and blow helium gas cooling, speed of cooling is 9 DEG C/s, is cooled to 490 DEG C, insulation 40min, and then water-cooled is cooled to room temperature with 10 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 150 DEG C, and time of drying is 8h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
The aforesaid high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element, this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1090 DEG C, insulation 5h, then adopts water-cooled to be cooled to 725 DEG C with the speed of 18 DEG C/s, then uses oil cooling to be cooled to 290 DEG C with 13 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 630 DEG C, insulation 1.8h, is cooled to room temperature by steel water coolant with the speed of 9 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 770 DEG C, is incubated 12min after temperature; First time tempering again: Heating temperature is 800 DEG C, is incubated 22min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 855 DEG C, after temperature, be incubated 25min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 11 DEG C/s, molten steel to be chilled to 510 DEG C, then air cooling to 290 DEG C, then adopts water-cooled, with the rate of cooling of 7 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1020 DEG C of 20 DEG C/s, insulation 4.5h, then adopt and blow helium gas cooling, speed of cooling is 8 DEG C/s, is cooled to 485 DEG C, insulation 38min, and then water-cooled is cooled to room temperature with 9 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 120 DEG C, and time of drying is 7h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
The invention has the beneficial effects as follows: not only intensity is high to be somebody's turn to do the high-strength corrosion-resistant steel bar steel containing rare earth element, long service life, production cost is low, thermal treatment process is simple, and working efficiency is high, and corrosion resistance, antioxidant property and resistance to elevated temperatures significantly improve, the consumption that can reduce steel in utilization just can reach its design requirements, reduce the complexity of structure, reduce costs, security is high, wherein add Mo element, erosion resistance and intensity can be improved, add V element, energy crystal grain thinning in thermal treatment, its intensity can be strengthened, toughness, anticorrosive, wear-resisting and withstand shocks load etc., add P element, energy crystal grain thinning and its superheated susceptivity of reduction and temper brittleness, improve intensity, resistant to hydrogen under weather-resistant and high temperature can be improved, nitrogen, ammonia corrosion, add Cr and Ni trace element, its wear-resisting ability ability can be improved and increase its intensity, improve its fusing point, increase the ability of high temperature resistance, also add rare earth element simultaneously, fine and close crystal grain is formed in heat treatment process, and be evenly distributed, increase its intensity, improve its over-all properties, produce beyond thought technique effect,
The grain fineness number of a normalizing+double tempering energy refinement steel wire is adopted in this thermal treatment process, improve its intensity and corrosion-resistant, rub resistance and antioxidant property, and the method adopting oil cooling and water-cooled to combine, improves its intensity, and put into vacuum oven adopt blow helium gas cooling, can prevent and the oxygen generation oxidizing reaction in air, be conducive to crystal grain thinning and impel crystal grain to be evenly distributed, improving its intensity and comprehensive mechanical performance, increase its work-ing life.
Embodiment
The present invention is described in further detail below:
embodiment 1
The present embodiment provides a kind of high-strength corrosion-resistant steel bar steel containing rare earth element, and Chemical Composition is by mass percentage: C:0.02%, Ni:5.3%, Cr:2.47%, Si:1.23%, Mn:2.35%, Cu:2.8%, V:0.26%, Mo:0.31%, P:0.036%, W:0.65%, rare earth element: 1.15%, surplus is Fe; Rare earth element is by mass percentage: La:3.2%, Gd:6.5%, Pr:12.5%, Er:16%, Ho:5.8%, Nd:13.5%, Sm:14.8%, Lu:10.5%, and surplus is Yb; The high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique that this invention also provides this to contain rare earth element, the method is carried out according to the following steps: step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1080 DEG C, insulation 4h, then adopt water-cooled to be cooled to 720 DEG C with the speed of 16 DEG C/s, then use oil cooling to be cooled to 280 DEG C with 12 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 625 DEG C, insulation 1h, is cooled to room temperature by steel water coolant with the speed of 8 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 760 DEG C, is incubated 10min after temperature; First time tempering again: Heating temperature is 790 DEG C, is incubated 20min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 850 DEG C, after temperature, be incubated 20min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 10 DEG C/s, molten steel to be chilled to 500 DEG C, then air cooling to 280 DEG C, then adopts water-cooled, with the rate of cooling of 5 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1000 DEG C of 18 DEG C/s, insulation 4h, then adopt and blow helium gas cooling, speed of cooling is 7 DEG C/s, is cooled to 480 DEG C, insulation 35-40min, and then water-cooled is cooled to room temperature with 8-10 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 100 DEG C, and time of drying is 5-8h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
embodiment 2
The present embodiment provides a kind of high-strength corrosion-resistant steel bar steel containing rare earth element: Chemical Composition is by mass percentage: C:0.05%, Ni:5.6%, Cr:2.49%, Si:1.26%, Mn:2.38%, Cu:3.2%, V:0.28%, Mo:0.38%, P:0.038%, W:0.68%, rare earth element: 1.18%, surplus is Fe; Rare earth element is by mass percentage: La:3.5%, Gd:6.8%, Pr:14.5%, Er:18%, Ho:6.5%, Nd:13.9%, Sm:15.3%, Lu:10.8%, and surplus is Yb; The high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique that this invention also provides this to contain rare earth element, the method is carried out according to the following steps: step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1100 DEG C, insulation 6h, then adopt water-cooled to be cooled to 730 DEG C with the speed of 20 DEG C/s, then use oil cooling to be cooled to 300 DEG C with 14 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 638 DEG C, insulation 2h, is cooled to room temperature by steel water coolant with the speed of 10 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 780 DEG C, is incubated 15min after temperature; First time tempering again: Heating temperature is 810 DEG C, is incubated 25min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 860 DEG C, after temperature, be incubated 30min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 12 DEG C/s, molten steel to be chilled to 520 DEG C, then air cooling to 310 DEG C, then adopts water-cooled, with the rate of cooling of 8 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1050 DEG C of 25 DEG C/s, insulation 5h, then adopt and blow helium gas cooling, speed of cooling is 9 DEG C/s, is cooled to 490 DEG C, insulation 40min, and then water-cooled is cooled to room temperature with 10 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 150 DEG C, and time of drying is 8h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
embodiment 3
The present embodiment provides a kind of high-strength corrosion-resistant steel bar steel containing rare earth element: Chemical Composition is by mass percentage: C:0.03%, Ni:5.5%, Cr:2.48%, Si:1.25%, Mn:2.37%, Cu:2.9%, V:0.27%, Mo:0.35%, P:0.032%, W:0.67%, rare earth element: 1.16%, surplus is Fe; Rare earth element is by mass percentage: La:3.3%, Gd:6.7%, Pr:12.8%, Er:17%, Ho:6.2%, Nd:13.8%, Sm:14.9%, Lu:10.6%, and surplus is Yb; The high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique that this invention also provides this to contain rare earth element, the method is carried out according to the following steps: step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1090 DEG C, insulation 5h, then adopt water-cooled to be cooled to 725 DEG C with the speed of 18 DEG C/s, then use oil cooling to be cooled to 290 DEG C with 13 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 630 DEG C, insulation 1.8h, is cooled to room temperature by steel water coolant with the speed of 9 DEG C/s; Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 770 DEG C, is incubated 12min after temperature; First time tempering again: Heating temperature is 800 DEG C, is incubated 22min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 855 DEG C, after temperature, be incubated 25min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 11 DEG C/s, molten steel to be chilled to 510 DEG C, then air cooling to 290 DEG C, then adopts water-cooled, with the rate of cooling of 7 DEG C/s, steel is chilled to room temperature; Step (3): steel is put into vacuum oven, first with the heating rate to 1020 DEG C of 20 DEG C/s, insulation 4.5h, then adopt and blow helium gas cooling, speed of cooling is 8 DEG C/s, is cooled to 485 DEG C, insulation 38min, and then water-cooled is cooled to room temperature with 9 DEG C/s speed; Step (4): use oily clean surface, then put into drying oven, drying temperature is 120 DEG C, and time of drying is 7h, and then air cooling is to room temperature; Step (5): UT (Ultrasonic Testing) inspection and inspection size.
Like this by the technical scheme of above embodiment, not only intensity is high to be somebody's turn to do the high-strength corrosion-resistant steel bar steel containing rare earth element, long service life, production cost is low, and thermal treatment process is simple, working efficiency is high, and corrosion resistance, antioxidant property and resistance to elevated temperatures significantly improve, the consumption that can reduce steel in utilization just can reach its design requirements, reduces the complexity of structure, reduce costs, security is high.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (8)
1., containing a high-strength corrosion-resistant steel bar steel for rare earth element, it is characterized in that: Chemical Composition is by mass percentage: C:0.02-0.05%, Ni:5.3-5.6%, Cr:2.47-2.49%, Si:1.23-1.26%, Mn:2.35-2.38%, Cu:2.8-3.2%, V:0.26-0.28%, Mo:0.31-0.38%, P:0.036-0.038%, W:0.65-0.68%, rare earth element: 1.15-1.18%, surplus is Fe;
Described compound rare-earth is by mass percentage: La:3.2-3.5%, Gd:6.5-6.8%, Pr:12.5-14.5%, Er:16-18%, Ho:5.8-6.5%, Nd:13.5-13.9%, Sm:14.8-15.3%, Lu:10.5-10.8%, and surplus is Yb.
2. the high-strength corrosion-resistant steel bar steel containing rare earth element according to claim 1, is characterized in that: Chemical Composition is by mass percentage: C:0.02%, Ni:5.3%, Cr:2.47%, Si:1.23%, Mn:2.35%, Cu:2.8%, V:0.26%, Mo:0.31%, P:0.036%, W:0.65%, rare earth element: 1.15%, surplus is Fe;
Described rare earth element is by mass percentage: La:3.2%, Gd:6.5%, Pr:12.5%, Er:16%, Ho:5.8%, Nd:13.5%, Sm:14.8%, Lu:10.5%, and surplus is Yb.
3. the high-strength corrosion-resistant steel bar steel containing rare earth element according to claim 1, is characterized in that: Chemical Composition is by mass percentage: C:0.05%, Ni:5.6%, Cr:2.49%, Si:1.26%, Mn:2.38%, Cu:3.2%, V:0.28%, Mo:0.38%, P:0.038%, W:0.68%, rare earth element: 1.18%, surplus is Fe;
Described rare earth element is by mass percentage: La:3.5%, Gd:6.8%, Pr:14.5%, Er:18%, Ho:6.5%, Nd:13.9%, Sm:15.3%, Lu:10.8%, and surplus is Yb.
4. the high-strength corrosion-resistant steel bar steel containing rare earth element according to claim 1, is characterized in that: Chemical Composition is by mass percentage: C:0.03%, Ni:5.5%, Cr:2.48%, Si:1.25%, Mn:2.37%, Cu:2.9%, V:0.27%, Mo:0.35%, P:0.032%, W:0.67%, rare earth element: 1.16%, surplus is Fe;
Described rare earth element is by mass percentage: La:3.3%, Gd:6.7%, Pr:12.8%, Er:17%, Ho:6.2%, Nd:13.8%, Sm:14.9%, Lu:10.6%, and surplus is Yb.
5., containing a high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique for rare earth element, it is characterized in that: this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and is heated to 1080-1100 DEG C, insulation 4-6h, then adopt water-cooled to be cooled to 720-730 DEG C with the speed of 16-20 DEG C/s, then use oil cooling to be cooled to 280-300 DEG C with 12-14 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 625-638 DEG C, insulation 1-2h, is cooled to room temperature by steel water coolant with the speed of 8-10 DEG C/s;
Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 760-780 DEG C, is incubated 10-15min after temperature; First time tempering again: Heating temperature is 790-810 DEG C, is incubated 20-25min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 850-860 DEG C, after temperature, be incubated 20-30min, then adopt water-cooled to be combined with air cooling, first adopt water-cooled, with the rate of cooling of 10-12 DEG C/s, molten steel is chilled to 500-520 DEG C, then air cooling is to 280-310 DEG C, then adopts water-cooled, with the rate of cooling of 5-8 DEG C/s, steel is chilled to room temperature;
Step (3): steel is put into vacuum oven, elder generation to 1000-1050 DEG C, is incubated 4-5h with the heating rate of 18-25 DEG C/s, then adopt and blow helium gas cooling, speed of cooling is 7-9 DEG C/s, is cooled to 480-490 DEG C, insulation 35-40min, then water-cooled is cooled to room temperature with 8-10 DEG C/s speed;
Step (4): use oily clean surface, then put into drying oven, drying temperature is 100-150 DEG C, and time of drying is 5-8h, and then air cooling is to room temperature;
Step (5): UT (Ultrasonic Testing) inspection and inspection size.
6. the high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element according to claim 5, is characterized in that: this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1080 DEG C, insulation 4h, then adopts water-cooled to be cooled to 720 DEG C with the speed of 16 DEG C/s, then uses oil cooling to be cooled to 280 DEG C with 12 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 625 DEG C, insulation 1h, is cooled to room temperature by steel water coolant with the speed of 8 DEG C/s;
Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 760 DEG C, is incubated 10min after temperature; First time tempering again: Heating temperature is 790 DEG C, is incubated 20min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 850 DEG C, after temperature, be incubated 20min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 10 DEG C/s, molten steel to be chilled to 500 DEG C, then air cooling to 280 DEG C, then adopts water-cooled, with the rate of cooling of 5 DEG C/s, steel is chilled to room temperature;
Step (3): steel is put into vacuum oven, first with the heating rate to 1000 DEG C of 18 DEG C/s, insulation 4h, then adopt and blow helium gas cooling, speed of cooling is 7 DEG C/s, is cooled to 480 DEG C, insulation 35-40min, and then water-cooled is cooled to room temperature with 8-10 DEG C/s speed;
Step (4): use oily clean surface, then put into drying oven, drying temperature is 100 DEG C, and time of drying is 5-8h, and then air cooling is to room temperature;
Step (5): UT (Ultrasonic Testing) inspection and inspection size.
7. the high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element according to claim 5, is characterized in that: this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1100 DEG C, insulation 6h, then adopts water-cooled to be cooled to 730 DEG C with the speed of 20 DEG C/s, then uses oil cooling to be cooled to 300 DEG C with 14 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 638 DEG C, insulation 2h, is cooled to room temperature by steel water coolant with the speed of 10 DEG C/s;
Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 780 DEG C, is incubated 15min after temperature; First time tempering again: Heating temperature is 810 DEG C, is incubated 25min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 860 DEG C, after temperature, be incubated 30min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 12 DEG C/s, molten steel to be chilled to 520 DEG C, then air cooling to 310 DEG C, then adopts water-cooled, with the rate of cooling of 8 DEG C/s, steel is chilled to room temperature;
Step (3): steel is put into vacuum oven, first with the heating rate to 1050 DEG C of 25 DEG C/s, insulation 5h, then adopt and blow helium gas cooling, speed of cooling is 9 DEG C/s, is cooled to 490 DEG C, insulation 40min, and then water-cooled is cooled to room temperature with 10 DEG C/s speed;
Step (4): use oily clean surface, then put into drying oven, drying temperature is 150 DEG C, and time of drying is 8h, and then air cooling is to room temperature;
Step (5): UT (Ultrasonic Testing) inspection and inspection size.
8. the high-strength corrosion-resistant steel bar Heat Treatment Of Steel technique containing rare earth element according to claim 5, is characterized in that: this technique is carried out according to the following steps:
Step (1): first carry out a thermal treatment: steel is put into high frequency furnace and be heated to 1090 DEG C, insulation 5h, then adopts water-cooled to be cooled to 725 DEG C with the speed of 18 DEG C/s, then uses oil cooling to be cooled to 290 DEG C with 13 DEG C/s speed; Then carry out quench treatment: put into high frequency furnace and be heated to 630 DEG C, insulation 1.8h, is cooled to room temperature by steel water coolant with the speed of 9 DEG C/s;
Step (2): utilize ultrasonic cleaner to clean cooled steel surface, then carry out Tempering and Quenching operation: adopt a normalizing+double tempering, first normalizing: temperature, at 770 DEG C, is incubated 12min after temperature; First time tempering again: Heating temperature is 800 DEG C, is incubated 22min after temperature, then carries out second time tempering after air cooling to room temperature; Heating temperature is 855 DEG C, after temperature, be incubated 25min, then adopts water-cooled to be combined with air cooling, first adopts water-cooled with the rate of cooling of 11 DEG C/s, molten steel to be chilled to 510 DEG C, then air cooling to 290 DEG C, then adopts water-cooled, with the rate of cooling of 7 DEG C/s, steel is chilled to room temperature;
Step (3): steel is put into vacuum oven, first with the heating rate to 1020 DEG C of 20 DEG C/s, insulation 4.5h, then adopt and blow helium gas cooling, speed of cooling is 8 DEG C/s, is cooled to 485 DEG C, insulation 38min, and then water-cooled is cooled to room temperature with 9 DEG C/s speed;
Step (4): use oily clean surface, then put into drying oven, drying temperature is 120 DEG C, and time of drying is 7h, and then air cooling is to room temperature;
Step (5): UT (Ultrasonic Testing) inspection and inspection size.
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| CN106224009A (en) * | 2016-08-30 | 2016-12-14 | 南京赛达机械制造有限公司 | The turbine blade of a kind of band damping structure and Technology for Heating Processing thereof |
| CN106350746A (en) * | 2016-08-30 | 2017-01-25 | 苏州利德精工制造有限公司 | Textile machine shooting-in and connecting rod and heat treatment technology |
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| WO2014097628A1 (en) * | 2012-12-21 | 2014-06-26 | Ｊｆｅスチール株式会社 | High-strength stainless steel seamless pipe for oil wells and method for producing same |
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| CN103209805A (en) * | 2010-11-02 | 2013-07-17 | 新日铁住金株式会社 | Method of cutting steel for use in machine structures |
| CN104204263A (en) * | 2012-04-05 | 2014-12-10 | 新日铁住金株式会社 | Steel wire rod or steel bar having excellent cold forgeability |
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