CN102181787B - Refractory corrosion-resisting steel as well as preparation and heat treatment method thereof - Google Patents
Refractory corrosion-resisting steel as well as preparation and heat treatment method thereof Download PDFInfo
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Abstract
The invention provides a preparation method and a heat treatment method for refractory corrosion-resisting steel. The invention aims to provide a preparation method and a heat treatment method for refractory corrosion-resisting steel with good high-temperature mechanical property and normal temperature corrosion resistant performance. The refractory corrosion-resisting steel comprisesC (Carbon), Cr (Chromium), Mo (Molybdenum), V (Vanadium), Nb (Niobium), Mn (Manganese), Si (Silicon) and Fe (Ferrum). The preparation and heat treatment method comprises the following steps of: (1) smelting the components of the refractory corrosion-resisting steel in an immediate frequency vacuum smelting furnace according to a mixing ratio so as to obtain a cast alloy; and (2) carrying out diffusion annealing treatment and forging treatment on the cast alloy, solutionizing the cast alloy at 1080 DEG C for two hours, preserving the heat for 2 hours after normalizing, annealing the cast alloy, and then quenching and annealing to finish the heat treatment of the refractory corrosion-resisting steel. In the invention, the strength of the refractory corrosion-resisting steel is assured by the carbon in the refractory corrosion-resisting steel, the definite corrosion resistance of the refractory corrosion-resisting steel is assured by the chromium, and the molybdenum, the vanadium and theniobium, in particular the Niobium, are added to the benefit of the improvement of the heat resistance of the refractory corrosion-resisting steel.
Description
Technical field
The present invention relates to a kind of steel and preparation thereof and heat treating method.
Background technology
Hot-work die steel is mainly used in hot-forging die, hot extruding die, transfer mold and isothermal forging mould etc.Hot-work die requires under working temperature, to have higher strength and toughness, oxidation-resistance, wear resistance, thermostability, cold and hot fatigue property and solidity to corrosion.Hot-work die steel gains great popularity with good red hardness, and it has experienced, and low Cr-Mo is, the H of high Cr is and the QRO series triple-substituted development of middle Cr.HOTVAR possesses good ambient temperature mechanical properties and hot properties.But its normal temperature solidity to corrosion and high-temperature oxidation resistance can not satisfy the demand of some special occasions (needing to use or hot-extrusion mold after the long-term storage).
JP speciallys permit No. 2960496 B2 and discloses a kind of firm preparation and heat treating method, but this kind method causes the undissolved carbide in the final tissue can not be dissolved into matrix (ferritic or martensite) lining, and undissolved carbide reduces firm plasticity and toughness.
Summary of the invention
The objective of the invention is to cause the undissolved carbide in the final tissue can not be dissolved into matrix (ferritic or martensite) lining in order to solve existing firm preparation and heat treating method; And the technical problem that undissolved carbide reduces firm plasticity and toughness provides a kind of preparation and the thermal treatment heat method of CRES by force.
The strong CRES of heat is made up of 0.45%～0.55% C, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the Fe of surplus according to the quality percentage composition.
The strong CRES of heat according to the quality percentage composition by 0.45%～0.55% C, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si; 0.1%～1.0% Rare-Earth Ce, surplus are that Fe forms.
The method of preparation and the strong CRES of thermal treatment heat is following: one, each composition proportion according to the strong CRES of above-mentioned heat obtains cast alloy with the smelting of intermediate frequency vacuum melting furnace; Two,, after 1080 ℃ of solid solutions normalizing in 2 hours,,,, promptly accomplish the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering then 980 ℃～1200 ℃ quenchings in 850 ℃ of insulations annealing in 2 hours with cast alloy process diffusion annealing and conducting forging processing.
Carbon content 0.45%～0.55% in the strong CRES of the present invention heat has guaranteed the intensity of hot strong CRES; Chromium content is 3.5%～4.5% can guarantee that the strong CRES of heat has certain corrosion resisting property; Molybdenum, vanadium, niobium especially being added with of niobium are beneficial to the heat raising of CRES heat resistance by force.
Advantage of the present invention is that CRES can guarantee to possess certain solidity to corrosion under the precondition of mechanical behavior under high temperature, compares more anti-corrosionly with reference steel grade HOTVAR, can under some corrode occasion, replace HOTVAR, satisfies the type alloy corrosion proof requirement.The tempered structure of the strong CRES of heat is tempered martensite and goes up the carbide that disperse distributes.The tensile strength of the strong CRES of heat can be 1915MPa under the thermal treatment process, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.The strong CRES erosion rate in 5%NaCl solution of heat is 0.0443mm/y, is assessed as anti-corrosion grade according to national standard.And under 600 ℃, has oxidation-resistance.
Description of drawings
Fig. 1 is that the tissue topography through 1080 ℃ of strong CRESs of quenching after heat schemes in the embodiment 17; Fig. 2 is that the tissue topography through 980 ℃ of strong CRESs of quenching after heat schemes in the embodiment 19; Fig. 3 is that the tissue topography through 1120 ℃ of strong CRESs of quenching after heat schemes in the embodiment 20; Fig. 4 is through the hot impelling strength curve of CRES by force under the different tempering temperatures after 1080 ℃ of quenchings in the embodiment 21; Fig. 5 be in the embodiment 21 under 600 ℃ of tempering temperatures the figure of tissue topography of the strong CRES of heat; Fig. 6 be in the embodiment 21 under 580 ℃ of tempering temperatures the figure of tissue topography of the strong CRES of heat.
Embodiment
Technical scheme of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the strong CRES of heat is made up of 0.45%～0.55% C, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the Fe of surplus according to the quality percentage composition in this embodiment.
The strong CRES erosion rate in 5%NaCl solution of heat is 0.0443mm/y in this embodiment, is assessed as anti-corrosion grade according to national standard.And under 600 ℃, has oxidation-resistance.
Embodiment two: this embodiment and embodiment one are different, and to be the strong CRES of heat be made up of 0.50% C, 4% Cr, 3% Mo, 1% V, 0.1% Nb, 1% Mn, 1% Si and the Fe of surplus according to the quality percentage composition.
The strong CRES erosion rate in 5%NaCl solution of heat is 0.0443mm/y in this embodiment, is assessed as anti-corrosion grade according to national standard.And under 600 ℃, has oxidation-resistance.
Embodiment three: this embodiment and embodiment one are different, and to be the strong CRES of heat be made up of 0.53% C, 3.8% Cr, 3.2% Mo, 1.2% V, 0.15% Nb, 1.2% Mn, 1.2% Si and the Fe of surplus according to the quality percentage composition.
Embodiment four: in this embodiment the strong CRES of heat according to the quality percentage composition by 0.45%～0.55% C, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si; 0.1%～1.0% Rare-Earth Ce, surplus are that Fe forms.
The strong CRES erosion rate in 5%NaCl solution of heat is 0.0443mm/y in this embodiment, is assessed as anti-corrosion grade according to national standard.And under 600 ℃, has oxidation-resistance.
Embodiment five: this embodiment and embodiment four are different be the strong CRES of heat according to the quality percentage composition by 0.50% C, 4% Cr, 3% Mo, 1% V, 0.1% Nb, 1% Mn, 1% Si; 0.5% Rare-Earth Ce, surplus are that Fe forms.
The strong CRES erosion rate in 5%NaCl solution of heat is 0.0443mm/y in this embodiment, is assessed as anti-corrosion grade according to national standard.And under 600 ℃, has oxidation-resistance.
Embodiment six: this embodiment and embodiment four are different be the strong CRES of heat according to the quality percentage composition by 0.53% C, 3.8% Cr, 3.2% Mo, 1.2% V, 0.15% Nb, 1.2% Mn, 1.2% Si; 0.8% Rare-Earth Ce, surplus are that Fe forms.
Embodiment seven: preparation is following with the method for the strong CRES of thermal treatment heat in this embodiment: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 980 ℃～1200 ℃ quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment eight: what this embodiment and embodiment seven were different is that quenching temperature is 1050～1100 ℃ in the step 2.
Embodiment nine: what this embodiment and embodiment seven were different is that quenching temperature is 1105～1150 ℃ in the step 2.
Embodiment ten: what this embodiment and embodiment seven were different is that tempering temperature is 580 ℃ in the step 2.
Embodiment 11: what this embodiment and embodiment seven were different is that tempering temperature is 600 ℃ in the step 2.
Embodiment 12: the method for the hot strong CRES of preparation and thermal treatment is following in this embodiment: one, by the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si, 0.1%～1.0% Rare-Earth Ce and surplus are that the ratio of Fe obtains cast alloy with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 980 ℃～1200 ℃ quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment 13: what this embodiment and embodiment 12 were different is that quenching temperature is 1050～1100 ℃ in the step 2.
Embodiment 14: what this embodiment and embodiment 12 were different is that quenching temperature is 1105～1150 ℃ in the step 2.
Embodiment 15: what this embodiment and embodiment 12 were different is that tempering temperature is 580 ℃ in the step 2.
Embodiment 16: what written or printed documents embodiment and embodiment 12 were different is that tempering temperature is 600 ℃ in the step 2.
Embodiment 17: preparation is following with the method for the strong CRES of thermal treatment heat in this embodiment: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 1080 ℃ of quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering.
Find out that by Fig. 1 the strong CRES of heat can obtain the better strength and toughness coupling through 1080 ℃ of these steel grades that quench, toughness is best, and intensity is higher.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment 18: preparation is following with the method for the strong CRES of thermal treatment heat in this embodiment: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 1100 ℃ of quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering.
In this embodiment through the steel grade of 1100 ℃ of quenchings than through the tough sexual deviation of the steel grade of 1080 ℃ of quenchings but intensity improve.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment 19: preparation is following with the method for the strong CRES of thermal treatment heat in this embodiment: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 980 ℃ of quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃ of tempering.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment 20: the method for the hot strong CRES of preparation and thermal treatment is following in this embodiment: one, by the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si, 0.1%～1.0% Rare-Earth Ce and surplus are that the ratio of Fe obtains cast alloy with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 1120 ℃ of quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 640 ℃ of tempering.
The tensile strength of the strong CRES of thermal treatment after heat can be 1915MPa, and ys can be 1685MPa, and relative reduction in area can be 18.6%, and unit elongation can be 8.01%, and hardness can be 54HRC, and impelling strength can be 9.8J.The strong CRES of heat after the thermal treatment also has the excellent high-temperature mechanical property, and tensile strength reaches 1778MPa in the time of 400 ℃, and tensile strength reaches 1245MPa in the time of 600 ℃, and 3 red hardness test results of 600 ℃ of tempering are 52.6HRC.
Embodiment 21: preparation is following with the method for the strong CRES of thermal treatment heat in this embodiment: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two, cast alloy was handled 3 hours through 1200 ℃ of diffusion annealings; Forging ratio greater than 3: 1,950 ℃～1050 ℃ condition under conducting forging processing; After 1080 ℃ of solid solutions normalizing in 2 hours, annealed in 2 hours 850 ℃ of insulations; 1080 ℃ of quenchings,, promptly accomplish then the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering.
Claims (8)
1. the method for preparation and the strong CRES of thermal treatment heat is characterized in that the method for preparing with the strong CRES of thermal treatment heat is following: one, obtain cast alloy in the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si and the ratio of surplus Fe with the smelting of intermediate frequency vacuum melting furnace; Two,, after 1080 ℃ of solid solutions normalizing in 2 hours,,,, promptly accomplish the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering then 980 ℃～1200 ℃ quenchings in 850 ℃ of insulations annealing in 2 hours with cast alloy process diffusion annealing processing and conducting forging processing.
2. according to the method for said preparation of claim 1 and the strong CRES of thermal treatment heat, it is characterized in that quenching temperature is 1050～1100 ℃ in the step 2.
3. according to the method for said preparation of claim 1 and the strong CRES of thermal treatment heat, it is characterized in that quenching temperature is 1105～1150 ℃ in the step 2.
4. according to the method for said preparation of claim 1 and the strong CRES of thermal treatment heat, it is characterized in that tempering temperature is 580 ℃～600 ℃ in the step 2.
5. prepare and the hot method of CRES by force of thermal treatment; It is characterized in that the method for preparing with the hot strong CRES of thermal treatment is following: one, by the C of each composition quality percentage composition 0.45%～0.55% in the strong CRES of heat, 3.5%～4.5% Cr, 2.5%～3.5% Mo, 0.5%～1.5% V, 0.05%～0.2% Nb, 0.5%～1.5% Mn, 0.5%～1.5% Si, 0.1%～1.0% Rare-Earth Ce and surplus are that the ratio of Fe obtains cast alloy with the smelting of intermediate frequency vacuum melting furnace; Two,, after 1080 ℃ of solid solutions normalizing in 2 hours,,,, promptly accomplish the strong anti-corrosion Heat Treatment Of Steel of heat again 520 ℃～640 ℃ tempering then 980 ℃～1200 ℃ quenchings in 850 ℃ of insulations annealing in 2 hours with cast alloy process diffusion annealing processing and conducting forging processing.
6. according to the method for said preparation of claim 5 and the strong CRES of thermal treatment heat, it is characterized in that quenching temperature is 1050～1100 ℃ in the step 2.
7. according to the method for said preparation of claim 5 and the strong CRES of thermal treatment heat, it is characterized in that quenching temperature is 1105～1150 ℃ in the step 2.
8. according to the method for said preparation of claim 5 and the strong CRES of thermal treatment heat, it is characterized in that tempering temperature is 580 ℃～600 ℃ in the step 2.
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| CN105568180A (en) * | 2016-01-07 | 2016-05-11 | 上海大学 | Nickel saving type heat resisting cast steel and preparing method thereof |
| CN108213863B (en) * | 2017-12-13 | 2020-04-24 | 北京市计量检测科学研究院 | Preparation method of high-energy/ultrahigh-energy Charpy V-shaped notch standard sample |
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|---|---|---|---|---|
| CN1088629A (en) * | 1992-12-22 | 1994-06-29 | 广西冶金研究所 | Rare-earth die steel and production method thereof |
| JP2960496B2 (en) * | 1989-12-12 | 1999-10-06 | 日立金属株式会社 | Cold tool steel |
| US6024916A (en) * | 1997-03-31 | 2000-02-15 | Daido Tokushuko Kabushiki Kaisha | Cast cold tool and method for producing the same |
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- 2011-04-12 CN CN2011100911519A patent/CN102181787B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2960496B2 (en) * | 1989-12-12 | 1999-10-06 | 日立金属株式会社 | Cold tool steel |
| CN1088629A (en) * | 1992-12-22 | 1994-06-29 | 广西冶金研究所 | Rare-earth die steel and production method thereof |
| US6024916A (en) * | 1997-03-31 | 2000-02-15 | Daido Tokushuko Kabushiki Kaisha | Cast cold tool and method for producing the same |
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| Title |
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| JP特许第2960496号B2 1999.07.30 |
| 刘海亮等.新型Fe-Cr-Mo-V系热强耐蚀钢的热处理工艺.《金属热处理》.2009,第34卷(第7期),第24-25页. |
| 新型Fe-Cr-Mo-V系热强耐蚀钢的热处理工艺;刘海亮等;《金属热处理》;20090731;第34卷(第7期);第24-25页 * |
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