CN102605271A - Low-alloy high-intensity high-toughness steel and production method of low-alloy high-intensity high-toughness steel - Google Patents
Low-alloy high-intensity high-toughness steel and production method of low-alloy high-intensity high-toughness steel Download PDFInfo
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Abstract
The invention discloses low-alloy high-intensity high-toughness steel and a production method of low-alloy high-intensity high-toughness steel. The method comprises the following work procedures of: the casting work procedure: the casting is carried out according to the following ingredients and contents to obtain low-alloy steel cast ingots: 0.15 to 0.30 weight percent of C elements, 0.30 to 0.70 weight percent of Si elements, 0.60 to 1.00 weight percent of Mn elements, 0.60 to 1.10 weight percent of Cr elements, 0.50 to 1.00 weight percent of Ni elements, 0.20 to 0.60 weight percent of Mo elements and the balance Fe and unavoidable impurities; the forging work procedure: the low-alloy steel cast ingots are forged, in addition, the blank opening forging heating temperature is 1160 DEG C to 1200 DEG C, the final forging temperature is 650 DEG C to 900 DEG C, and the deformation in each firing time is not smaller than 30 percent; and the heat treatment work procedure: the temperature of the forged and formed forgings is raised to 900 to 940 DEG C to be subjected to normalizing, the temperature is raised to 880 to 920 DEG C for carrying out quenching after the normalizing treatment, the temperature is raised to 530 to 600 DEG C for carrying out high-temperature tempering after the quenching treatment, and the low-alloy high-intensity high-toughness steel is obtained. In the embodiment of the invention, the low-alloy high-intensity high-toughness steel has high intensity and high toughness.
Description
Technical field
The present invention relates to metal material field, especially related to a kind of low-alloy high-strength and high-toughness steel and working method thereof.
Background technology
Low alloy steel is widely used in engineering machinery field owing to its excellent mechanical property and relatively low production and use cost; Use at present maximum steel types, tensile strength is usually below 1000MPa, and its ballistic work is lower, is difficult to adapt to harsh day by day applying working condition; Therefore, need keep under the prerequisite of high intensity level, further improve the impelling strength under the plasticity and toughness, particularly coldcondition of low alloy steel, thereby low alloy steel can be used under lower temperature.
In the prior art, disclose a kind of high-toughness low-alloy constructional steel and working method thereof, this structural low contains alloying elements such as Cr, Ni, Mo, Cu, V, Nb; And the employing converter is just refined, the production technique of the refining of LF stove, continuous casting; And after the modified thermal treatment of process quenching+high tempering; Make that its tensile strength can be more than or equal to 750MPa; And-40 ℃ of low-temperature impact toughness Akv >=150J after the carburizing thermo-chemical treatment, can be used for making the wear-resisting mechanical transmission part and the parts of various high-intensity high-tenacities.
In realizing process of the present invention, the contriver finds to exist at least in the prior art following problem:
1) material is an as-cast condition, if technology controlling and process is bad, then possibly have casting flaw, and influence performance; 2) carbon content is higher, can only one-side raising intensity, and may make plasticity and toughness receive corresponding influence; 3) intensity rank is not enough, and wear resisting property is affected.
Summary of the invention
The embodiment of the invention provides a kind of low-alloy high-strength and high-toughness steel and working method thereof, and this low alloy steel has HS and H.T..
In order to achieve the above object, the embodiment of the invention provides a kind of low-alloy high-strength and high-toughness steel, comprising:
The C element of 0.15wt%～0.30wt%;
The Si element of 0.30wt%～0.70wt%;
The Mn element of 0.60wt%～1.00wt%;
The Cr element of 0.60wt%～1.10wt%;
The Ni element of 0.50wt%～1.00wt%;
The Mo element of 0.20wt%～0.60wt%;
Surplus is Fe and unavoidable impurities.
Preferably, comprising: the C element of 0.20wt%～0.25wt%.
Preferably, comprising: the Si element of 0.40wt%～0.60wt%.
Preferably, comprising: the Mn element of 0.70wt%～0.85wt%.
Preferably, comprising: the Cr element of 0.80wt%～1.00wt%.
Preferably, comprising: the Ni element of 0.60wt%～0.90wt%.
Preferably, comprising: the Mo element of 0.30wt%～0.50wt%.
Preferably, said low-alloy high-strength and high-toughness steel also comprises: the REE of 0.0005wt%～0.01wt%.
Preferably, said REE comprises: the La element.
The embodiment of the invention provides a kind of working method of low-alloy high-strength and high-toughness steel, comprising:
Casting process: composition and content according to above-mentioned low-alloy high-strength and high-toughness steel are cast, and obtain the low alloy steel ingot casting;
Forging process: above-mentioned low alloy steel ingot casting is forged, and cogging Forge Heating temperature is 1160 ℃～1200 ℃ that final forging temperature is 650 ℃～900 ℃, every fire time deflection is not less than 30%;
Heat treatment step: the forging of above-mentioned forging molding is warming up to 900 ℃～940 ℃ carries out normalizing; Quench through being warming up to 880 ℃～920 ℃ after the normalizing treatment; Carry out high tempering through being warming up to 530 ℃～600 ℃ after the quench treatment, obtain the low-alloy high-strength and high-toughness steel.
Preferably, the soaking time of said normalizing is 1～3 hour, and the soaking time of said quenching is 1～3 hour, and the soaking time of said high tempering is 2～4 hours.
Compared with prior art, the embodiment of the invention has the following advantages at least: in the embodiment of the invention, alloying element content is lower, and adopts the ordinary arc furnace melting, and manufacturing and treatment process are simpler relatively; And the low-alloy high-strength and high-toughness steel has HS and H.T., is applicable under the situation that needs HS and H.T. and uses that it is particularly suitable for the engineering machinery field in novel modern times.
Description of drawings
In order to be illustrated more clearly in technical scheme of the present invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the working method schema of a kind of low-alloy high-strength and high-toughness steel of providing of the embodiment of the invention two.
Embodiment
To combine the accompanying drawing among the present invention below, the technical scheme among the present invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The present invention provides a kind of low-alloy high-strength and high-toughness steel, through the content of control chemical element, to realize the low-alloy high-strength and high-toughness steel of ys 1000MPa level; And this low-alloy high-strength and high-toughness steel can solve problems such as alloy constituent content, forming materials technology, the rank of gaining in strength.
Concrete, this low-alloy high-strength and high-toughness steel comprises:
The C element of 0.15wt%～0.30wt%.
In the embodiment of the invention,, and the C constituent content is controlled in the scope of 0.15wt%～0.30wt%, thereby reduces the quenching crack susceptibility of this low-alloy high-strength and high-toughness steel through the content of suitable reduction C element.
In the embodiment of the invention, a kind of content of preferred C element is: the C element that comprises 0.20wt%～0.25wt% in the low-alloy high-strength and high-toughness steel.
The Si element of 0.30wt%～0.70wt%.
In the embodiment of the invention,,, thereby can improve the oxidation-resistance and the erosion resistance of low this alloy high-strength and high-toughness steel therefore through the Si constituent content is controlled in the scope of 0.30wt%～0.70wt% because the Si element is the required element of deoxidation.
In the embodiment of the invention, a kind of content of preferred Si element is: the Si element that comprises 0.40wt%～0.60wt% in the low-alloy high-strength and high-toughness steel.
The Mn element of 0.60wt%～1.00wt%.
In the embodiment of the invention, because the Mn element is the required element of deoxidation and desulfurization, so through the Mn constituent content is controlled in the scope of 0.60wt%～1.00wt%, thereby can improve the hardness of this low-alloy high-strength and high-toughness steel, and improve the quenching performance.
In the embodiment of the invention, a kind of content of preferred L n element is: the Mn element that comprises 0.70wt%～0.85wt% in the low-alloy high-strength and high-toughness steel.
The Cr element of 0.60wt%～1.10wt%.
In the embodiment of the invention, through the Cr constituent content being controlled in the scope of 0.60wt%～1.10wt%,, avoid the carbide alligatoring simultaneously and the toughness that causes reduces to improve hardenability and anti-temper softening ability.
In the embodiment of the invention, a kind of content of preferred Cr element is: the Cr element that comprises 0.80wt%～1.00wt% in the low-alloy high-strength and high-toughness steel.
The Ni element of 0.50wt%～1.00wt%.
In the embodiment of the invention, form the unit, can improve intensity and keep good plasticity and toughness again, can influence ductility at most, therefore the Ni constituent content is controlled in the scope of 0.50wt%～1.00wt% but cross because Ni is a kind of austenite.
In the embodiment of the invention, a kind of content of preferred Ni element is: the Ni element that comprises 0.60wt%～0.90wt% in the low-alloy high-strength and high-toughness steel.
The Mo element of 0.20wt%～0.60wt%.
In the embodiment of the invention; Through the Mo constituent content being controlled in the scope of 0.20wt%～0.60wt%, the crystal grain of refinement steel, and separate out with the form of carbide; Thereby improve the intensity of low-alloy high-strength and high-toughness steel, combine to improve erosion resistance and oxidation-resistance simultaneously with the Si element.
In the embodiment of the invention, a kind of content of preferred L o element is: the Mo element that comprises 0.30wt%～0.50wt% in the low-alloy high-strength and high-toughness steel.
Preferably, the REE that also comprises 0.0005wt%～0.01wt% in this low-alloy high-strength and high-toughness steel.
In the embodiment of the invention, through adding a small amount of REE, thus crystal grain thinning, and rotten inclusion, improve over-all properties.
In the embodiment of the invention, a kind of preferred REE comprises: the La element.
Unavoidable impurities.
For example, this unavoidable impurities can be impurity elements such as S, P, Al; In addition, need impurity elements such as control S, P, Al in lower scope, like the S constituent content≤0.03wt% that comprises in the low-alloy high-strength and high-toughness steel, P constituent content≤0.03wt%, Al constituent content≤0.07wt%.
Surplus is Fe.
Embodiment one
Based on the composition and the content of above-mentioned low-alloy high-strength and high-toughness steel, the embodiment of the invention one provides a kind of working method of low-alloy high-strength and high-toughness steel, to realize the low-alloy high-strength and high-toughness steel of ys 1000MPa level; And this low-alloy high-strength and high-toughness steel can solve problems such as alloy constituent content, forming materials technology, the rank of gaining in strength; This method is handled through the as cast condition material being carried out the gross distortion forging molding, forges the broken as-cast structure of ability, and crystal grain thinning increases dislocation desity, improves intensity, and the defective that some castings of healing simultaneously form prevents the plasticity and toughness reduction; Forging to after forging quenches+high tempering thermal treatment, obtains the tempered sorbite tissue, can obtain very high toughness, keeps higher intensity simultaneously.
As shown in Figure 1, the working method of this low-alloy high-strength and high-toughness steel may further comprise the steps:
In the embodiment of the invention, the composition and the content of this low-alloy high-strength and high-toughness steel comprise: the C element of 0.15wt%～0.30wt%; The Si element of 0.30wt%～0.70wt%; The Mn element of 0.60wt%～1.00wt%; The Cr element of 0.60wt%～1.10wt%; The Ni element of 0.50wt%～1.00wt%; The Mo element of 0.20wt%～0.60wt%; Surplus is Fe and unavoidable impurities.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the C element of 0.20wt%～0.25wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the Si element of 0.40wt%～0.60wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the Mn element of 0.70wt%～0.85wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the Cr element of 0.80wt%～1.00wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the Ni element of 0.60wt%～0.90wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel comprises: the Mo element of 0.30wt%～0.50wt%.
In a kind of preferred implementation of the present invention, this low-alloy high-strength and high-toughness steel also comprises: the REE of 0.0005wt%～0.01wt%;
In a kind of preferred implementation of the present invention, this REE comprises: the La element.
In the embodiment of the invention, the soaking time of normalizing is 1～3 hour, and the soaking time of quenching is 1～3 hour, and the soaking time of high tempering is 2～4 hours.
Embodiment below in conjunction with concrete is elaborated to the embodiment of the invention.
Embodiment two
The low-alloy high-strength and high-toughness steel ingot casting of step 1, casting composition as shown in table 1, and the specification of ingot casting is Φ 100 * 110mm, the technology of control melting and cast.
Table 1 low alloy steel chemical ingredients (wt%)
| C | S | P | Mn | Si | Cr | Ni | Mo | Al | La |
| 0.25 | 0.003 | 0.012 | 0.72 | 0.32 | 1.04 | 0.83 | 0.31 | 0.039 | 0.0009 |
Step 2, step 1 gained ingot casting is forged.
In the embodiment of the invention, cogging Forge Heating temperature is 1160～1200 ℃, and final forging temperature is 700 ℃, and every fire time deflection is not less than 30%, and the forging cross-sectional dimensions is 16 * 80mm.
Step 3, step 2 gained forging is warming up to 930 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the normalizing treatment process.
Step 4, step 3 gained forging is warming up to 900 ℃, is incubated 2 hours, in water, be quickly cooled to room temperature; This process is the quench treatment process.
Step 5, step 4 gained forging is warming up to 550 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the high tempering process.
Based on above-mentioned processing, then mechanical property test is: from through sampling longitudinally on the forging after the above-mentioned processing, carry out the test of room temperature tensile and low temperature impact properties, the result is as shown in table 2.
The low alloy steel mechanical property test result of table 2 embodiment of the invention
Can be known that by above-mentioned test-results the low alloy steel that the embodiment of the invention provides (low-alloy high-strength and high-toughness steel) has very high intensity, plasticity and toughness are higher simultaneously, and particularly-40 the v-notch notched bar impact strength of ℃ test is higher, reaches AKV=50～85J; Adopt the resulting steel grade of the embodiment of the invention, reached the superstrength and the good comprehensive mechanical property of plasticity and toughness preferably, thereby can be applied to the condition that all has high requirements for intensity and toughness.
Embodiment three
The low-alloy high-strength and high-toughness steel ingot casting of step 1, casting composition as shown in table 3, and the specification of ingot casting is Φ 100 * 110mm, the technology of control melting and cast.
Table 3 low alloy steel chemical ingredients (wt%)
| C | S | P | Mn | Si | Cr | Ni | Mo | Al | La |
| 0.29 | 0.004 | 0.017 | 0.62 | 0.40 | 0.85 | 0.82 | 0.25 | 0.046 | 0.0005 |
Step 2, step 1 gained ingot casting is forged.
In the embodiment of the invention, cogging Forge Heating temperature is 1160～1200 ℃, and final forging temperature is 750 ℃, and every fire time deflection is not less than 30%, and the forging cross-sectional dimensions is 16 * 80mm.
Step 3, step 2 gained forging is warming up to 930 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the normalizing treatment process.
Step 4, step 3 gained forging is warming up to 880 ℃, is incubated 2 hours, in water, be quickly cooled to room temperature; This process is the quench treatment process.
Step 5, step 4 gained forging is warming up to 565 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the high tempering process.
Based on above-mentioned processing, then mechanical property test is: from through sampling longitudinally on the forging after the above-mentioned processing, carry out the test of room temperature tensile and low temperature impact properties, the result is as shown in table 4.
The low alloy steel mechanical property test result of table 4 embodiment of the invention
Can be known that by above-mentioned test-results the low alloy steel that the embodiment of the invention provides (low-alloy high-strength and high-toughness steel) has very high intensity, plasticity and toughness are higher simultaneously, and particularly-40 the v-notch notched bar impact strength of ℃ test is higher, reaches AKV=50～85J; Adopt the resulting steel grade of the embodiment of the invention, reached the superstrength and the good comprehensive mechanical property of plasticity and toughness preferably, thereby can be applied to the condition that all has high requirements for intensity and toughness.
Embodiment four
The low-alloy high-strength and high-toughness steel ingot casting of step 1, casting composition as shown in table 5, and the specification of ingot casting is Φ 100 * 110mm, the technology of control melting and cast.
Table 5 low alloy steel chemical ingredients (wt%)
| C | S | P | Mn | Si | Cr | Ni | Mo | Al | La |
| 0.20 | 0.008 | 0.017 | 0.62 | 0.65 | 1.08 | 0.95 | 0.53 | 0.029 | 0.0012 |
Step 2, step 1 gained ingot casting is forged.
In the embodiment of the invention, cogging Forge Heating temperature is 1160～1200 ℃, and final forging temperature is 730 ℃, and every fire time deflection is not less than 30%, and the forging cross-sectional dimensions is 16 * 80mm.
Step 3, step 2 gained forging is warming up to 930 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the normalizing treatment process.
Step 4, step 3 gained forging is warming up to 910 ℃, is incubated 2 hours, in water, be quickly cooled to room temperature; This process is the quench treatment process.
Step 5, step 4 gained forging is warming up to 530 ℃, is incubated 2.5 hours, in air, be cooled to room temperature; This process is the high tempering process.
Based on above-mentioned processing, then mechanical property test is: from through sampling longitudinally on the forging after the above-mentioned processing, carry out the test of room temperature tensile and low temperature impact properties, the result is as shown in table 6.
The low alloy steel mechanical property test result of table 6 embodiment of the invention
| Numbering | Tensile strength | Ys | Unit elongation | Relative reduction in area | -40 ℃ of low-temperature impact works |
| /MPa | /MPa | /％ | /％ | ?AKV/J | |
| Sample 1 | 1065 | 1002 | 16.2 | 53.4 | ?80 |
| Sample 2 | 1048 | 1001 | 15.6 | 54.3 | ?75 |
Can be known that by above-mentioned test-results the low alloy steel that the embodiment of the invention provides (low-alloy high-strength and high-toughness steel) has very high intensity, plasticity and toughness are higher simultaneously, and particularly-40 the v-notch notched bar impact strength of ℃ test is higher, reaches AKV=50～85J; Adopt the resulting steel grade of the embodiment of the invention, reached the superstrength and the good comprehensive mechanical property of plasticity and toughness preferably, thereby can be applied to the condition that all has high requirements for intensity and toughness.
Embodiment five
The low-alloy high-strength and high-toughness steel ingot casting of step 1, casting composition as shown in table 7, and the specification of ingot casting is Φ 130 * 100mm, the technology of control melting and cast.
Table 7 low alloy steel chemical ingredients (wt%)
| C | S | P | Mn | Si | Cr | Ni | Mo | Al | La |
| 0.24 | 0.005 | 0.018 | 0.65 | 0.52 | 0.85 | 0.73 | 0.25 | 0.025 | 0.0005 |
Step 2, step 1 gained ingot casting is forged.
In the embodiment of the invention, cogging Forge Heating temperature is 1160～1200 ℃, and final forging temperature is 680 ℃, and every fire time deflection is not less than 30%, and the forging cross-sectional dimensions is Φ 25mm.
Step 3, step 2 gained forging is warming up to 910 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the normalizing treatment process.
Step 4, step 3 gained forging is warming up to 890 ℃, is incubated 2 hours, in water, be quickly cooled to room temperature; This process is the quench treatment process.
Step 5, step 4 gained forging is warming up to 540 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the high tempering process.
Based on above-mentioned processing, then mechanical property test is: from through sampling longitudinally on the forging after the above-mentioned processing, carry out the test of room temperature tensile and low temperature impact properties, the result is as shown in table 8.
The low alloy steel mechanical property test result of table 8 embodiment of the invention
Can be known that by above-mentioned test-results the low alloy steel that the embodiment of the invention provides (low-alloy high-strength and high-toughness steel) has very high intensity, plasticity and toughness are higher simultaneously, and particularly-40 the v-notch notched bar impact strength of ℃ test is higher, reaches AKV=50～85J; Adopt the resulting steel grade of the embodiment of the invention, reached the superstrength and the good comprehensive mechanical property of plasticity and toughness preferably, thereby can be applied to the condition that all has high requirements for intensity and toughness.
Embodiment six
The low-alloy high-strength and high-toughness steel ingot casting of step 1, casting composition as shown in table 9, and the specification of ingot casting is Φ 90 * 130mm, the technology of control melting and cast.
Table 9 low alloy steel chemical ingredients (wt%)
| C | S | P | Mn | Si | Cr | Ni | Mo | Al | La |
| 0.16 | 0.005 | 0.015 | 0.82 | 0.57 | 0.65 | 0.56 | 0.44 | 0.035 | 0.0006 |
Step 2, step 1 gained ingot casting is forged.
In the embodiment of the invention, cogging Forge Heating temperature is 1160～1200 ℃, and final forging temperature is 760 ℃, and every fire time deflection is not less than 30%, and the forging cross-sectional dimensions is 14 * 30mm.
Step 3, step 2 gained forging is warming up to 920 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the normalizing treatment process.
Step 4, step 3 gained forging is warming up to 900 ℃, is incubated 2 hours, in water, be quickly cooled to room temperature; This process is the quench treatment process.
Step 5, step 4 gained forging is warming up to 560 ℃, is incubated 3 hours, in air, be cooled to room temperature; This process is the high tempering process.
Based on above-mentioned processing, then mechanical property test is: from through sampling longitudinally on the forging after the above-mentioned processing, carry out the test of room temperature tensile and low temperature impact properties, the result is as shown in table 10.
The low alloy steel mechanical property test result of table 10 embodiment of the invention
Can be known that by above-mentioned test-results the low alloy steel that the embodiment of the invention provides (low-alloy high-strength and high-toughness steel) has very high intensity, plasticity and toughness are higher simultaneously, and particularly-40 the v-notch notched bar impact strength of ℃ test is higher, reaches AKV=50～85J; Adopt the resulting steel grade of the embodiment of the invention, reached the superstrength and the good comprehensive mechanical property of plasticity and toughness preferably, thereby can be applied to the condition that all has high requirements for intensity and toughness.
In sum, can know through various embodiments of the present invention, the low-alloy high-strength and high-toughness steel ingot casting that the embodiment of the invention provided, alloying element content is lower, adopts the ordinary arc furnace melting, and cost is lower; Manufacturing and treatment process are simpler relatively; Steel have good intensity and toughness cooperates, and are applicable under the situation that needs HS and H.T. and use, and are particularly suitable for novel modern project machinery.
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (11)
1. a low-alloy high-strength and high-toughness steel is characterized in that, comprising:
The C element of 0.15wt%～0.30wt%;
The Si element of 0.30wt%～0.70wt%;
The Mn element of 0.60wt%～1.00wt%;
The Cr element of 0.60wt%～1.10wt%;
The Ni element of 0.50wt%～1.00wt%;
The Mo element of 0.20wt%～0.60wt%;
Surplus is Fe and unavoidable impurities.
2. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The C element of 0.20wt%～0.25wt%.
3. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The Si element of 0.40wt%～0.60wt%.
4. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The Mn element of 0.70wt%～0.85wt%.
5. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The Cr element of 0.80wt%～1.00wt%.
6. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The Ni element of 0.60wt%～0.90wt%.
7. low-alloy high-strength and high-toughness steel as claimed in claim 1 is characterized in that, comprising:
The Mo element of 0.30wt%～0.50wt%.
8. like each described low-alloy high-strength and high-toughness steel of claim 1-7, it is characterized in that said low-alloy high-strength and high-toughness steel also comprises: the REE of 0.0005wt%～0.01wt%.
9. low-alloy high-strength and high-toughness steel as claimed in claim 8 is characterized in that, said REE comprises: the La element.
10. the working method of a low-alloy high-strength and high-toughness steel is characterized in that, comprising:
Casting process: composition and content according to each described low-alloy high-strength and high-toughness steel of claim 1-8 are cast, and obtain the low alloy steel ingot casting;
Forging process: above-mentioned low alloy steel ingot casting is forged, and cogging Forge Heating temperature is 1160 ℃～1200 ℃ that final forging temperature is 650 ℃～900 ℃, every fire time deflection is not less than 30%;
Heat treatment step: the forging of above-mentioned forging molding is warming up to 900 ℃～940 ℃ carries out normalizing; Quench through being warming up to 880 ℃～920 ℃ after the normalizing treatment; Carry out high tempering through being warming up to 530 ℃～600 ℃ after the quench treatment, obtain the low-alloy high-strength and high-toughness steel.
11. working method as claimed in claim 10 is characterized in that,
The soaking time of said normalizing is 1～3 hour, and the soaking time of said quenching is 1～3 hour, and the soaking time of said high tempering is 2～4 hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436806A (en) * | 2013-07-25 | 2013-12-11 | 上海锐迈重工有限公司 | Production method of forged flange capable of meeting A694F70 high yield value core sampling requirements |
| CN104099456A (en) * | 2014-06-30 | 2014-10-15 | 贵州安大航空锻造有限责任公司 | Forging and heat treatment method of 9Cr18MoV steel forging |
| CN106435405A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | 42CrMo4 wind power main shaft after-forging heat treatment method of low-wind-speed wind turbine generator |
| CN106435404A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | Low wind speed wind power unit low-carbon alloy steel wind power main shaft manufacturing method |
| CN106435332A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | Manufacturing method for 40CrNiMoA medium-carbon alloy steel wind power main shaft of low wind speed wind power unit |
| CN106702284A (en) * | 2016-11-21 | 2017-05-24 | 杭州汽轮铸锻有限公司 | 30MnCrNiMo high-strength material and casting preparation method |
| CN107641755A (en) * | 2016-07-21 | 2018-01-30 | 无锡市法兰锻造有限公司 | A kind of forging and its manufacturing process with high/low-temperature impact performance |
| CN110184544A (en) * | 2019-07-08 | 2019-08-30 | 常熟市虹桥铸钢有限公司 | A kind of low alloy material and the heat treatment method using part made of the material |
| CN110205563A (en) * | 2019-07-08 | 2019-09-06 | 哈尔滨电机厂有限责任公司 | A kind of large-scale pumped storage power generator motor magnetic yoke forging preparation method |
| CN110468339A (en) * | 2019-09-26 | 2019-11-19 | 郑州机械研究所有限公司 | A kind of low temperature high-strength gear box body material and preparation method thereof |
| CN112281064A (en) * | 2020-10-27 | 2021-01-29 | 郑州煤机智能工作面科技有限公司 | Low-alloy high-strength steel plate forging for high-strength structure and forging method |
| CN112553525A (en) * | 2020-11-17 | 2021-03-26 | 天津重型装备工程研究有限公司 | Medium-carbon low-alloy high-strength steel and preparation method thereof |
| CN112853049A (en) * | 2019-11-27 | 2021-05-28 | 中国科学院金属研究所 | High-performance shaft sleeve material and heat treatment method thereof |
| CN117778889A (en) * | 2024-01-06 | 2024-03-29 | 五洲阀门股份有限公司 | Alloy material for valve and valve body production process |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103436806A (en) * | 2013-07-25 | 2013-12-11 | 上海锐迈重工有限公司 | Production method of forged flange capable of meeting A694F70 high yield value core sampling requirements |
| CN104099456A (en) * | 2014-06-30 | 2014-10-15 | 贵州安大航空锻造有限责任公司 | Forging and heat treatment method of 9Cr18MoV steel forging |
| CN106435405A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | 42CrMo4 wind power main shaft after-forging heat treatment method of low-wind-speed wind turbine generator |
| CN106435404A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | Low wind speed wind power unit low-carbon alloy steel wind power main shaft manufacturing method |
| CN106435332A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | Manufacturing method for 40CrNiMoA medium-carbon alloy steel wind power main shaft of low wind speed wind power unit |
| CN107641755A (en) * | 2016-07-21 | 2018-01-30 | 无锡市法兰锻造有限公司 | A kind of forging and its manufacturing process with high/low-temperature impact performance |
| CN106702284A (en) * | 2016-11-21 | 2017-05-24 | 杭州汽轮铸锻有限公司 | 30MnCrNiMo high-strength material and casting preparation method |
| CN110205563A (en) * | 2019-07-08 | 2019-09-06 | 哈尔滨电机厂有限责任公司 | A kind of large-scale pumped storage power generator motor magnetic yoke forging preparation method |
| CN110184544A (en) * | 2019-07-08 | 2019-08-30 | 常熟市虹桥铸钢有限公司 | A kind of low alloy material and the heat treatment method using part made of the material |
| CN110205563B (en) * | 2019-07-08 | 2021-04-06 | 哈尔滨电机厂有限责任公司 | Preparation method of magnetic yoke forging for large pumped storage power generation motor |
| CN110468339A (en) * | 2019-09-26 | 2019-11-19 | 郑州机械研究所有限公司 | A kind of low temperature high-strength gear box body material and preparation method thereof |
| CN112853049A (en) * | 2019-11-27 | 2021-05-28 | 中国科学院金属研究所 | High-performance shaft sleeve material and heat treatment method thereof |
| CN112281064A (en) * | 2020-10-27 | 2021-01-29 | 郑州煤机智能工作面科技有限公司 | Low-alloy high-strength steel plate forging for high-strength structure and forging method |
| CN112553525A (en) * | 2020-11-17 | 2021-03-26 | 天津重型装备工程研究有限公司 | Medium-carbon low-alloy high-strength steel and preparation method thereof |
| CN112553525B (en) * | 2020-11-17 | 2021-12-21 | 天津重型装备工程研究有限公司 | Medium-carbon low-alloy high-strength steel and preparation method thereof |
| CN117778889A (en) * | 2024-01-06 | 2024-03-29 | 五洲阀门股份有限公司 | Alloy material for valve and valve body production process |
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