CN107779775B - H13 high-speed precision forging die steel and steel ingot production method - Google Patents
H13 high-speed precision forging die steel and steel ingot production method Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 238000005242 forging Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000007670 refining Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000010891 electric arc Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 6
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 6
- 229910000676 Si alloy Inorganic materials 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 238000004512 die casting Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The invention relates to H13 high-speed precision forging die steel which comprises the following components in percentage by weight: c: 0.37% -0.40%; si: 0.95 to 1.05 percent; mn: 0.35 to 0.42 percent; cr: 5.1% -5.3%; mo: 1.40% -1.50%; v: 0.9 to 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 100 ppm; o: less than or equal to 22 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.015 percent; s: less than or equal to 0.005 percent; ni: less than or equal to 0.20 percent; al: less than or equal to 0.028 percent; cu: less than or equal to 0.08 percent; as: less than or equal to 0.020%; sn: less than or equal to 0.015 percent; sb: less than or equal to 0.0015 percent; the balance of Fe and inevitable impurities. The H13 high-speed precision forging die steel and the steel ingot can obtain the hardness of 45-52 HRC.
Description
Technical Field
The invention relates to a method for producing H13 high-speed precision forging die steel and steel ingots, belonging to the technical field of alloy steel.
Background
Die steel is a steel grade used for manufacturing dies such as cold stamping dies, hot forging dies, die casting dies and the like. The die is a main processing tool for manufacturing parts in industrial departments of mechanical manufacturing, radio instruments, motors, electric appliances and the like. The quality of the die directly affects the quality of the pressure processing technology, the precision yield of products and the production cost, and the quality and the service life of the die are mainly affected by die materials and heat treatment except by reasonable structural design and processing precision. The high-speed precision forging die steel can still be normally used under the requirement of high-speed operation. The high-speed precision forging die steel in the prior art has low surface hardness, so that the die is easy to damage.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the above technical defects, and to provide H13 high-speed precision forging die steel and steel ingot with high surface hardness.
In order to solve the technical problem, the H13 high-speed precision forging die steel comprises the following components in percentage by weight:
c: 0.37% -0.40%; si: 0.95 to 1.05 percent; mn: 0.35 to 0.42 percent; cr: 5.1% -5.3%; mo: 1.40% -1.50%; v: 0.9 to 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 100 ppm; o: less than or equal to 22 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.015 percent; s: less than or equal to 0.005 percent; ni: less than or equal to 0.20 percent; al: less than or equal to 0.028 percent; cu: less than or equal to 0.08 percent; as: less than or equal to 0.020%; sn: less than or equal to 0.015 percent; sb: less than or equal to 0.0015 percent; the balance of Fe and inevitable impurities.
Preferably, the H13 high-speed precision forging die steel comprises the following components in percentage by weight:
c: 0.38% -0.40%; si: 0.95 to 1.05 percent; mn: 0.38% -0.40%; cr: 5.1% -5.3%; mo: 1.40% -1.50%; v: 0.9 to 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 100 ppm; o: less than or equal to 22 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.010 percent; s: less than or equal to 0.003 percent; ni: less than or equal to 0.18 percent; al: less than or equal to 0.025 percent; cu: less than or equal to 0.06 percent; as: less than or equal to 0.015 percent; sn: less than or equal to 0.013 percent; sb: less than or equal to 0.0013 percent; the balance of Fe and inevitable impurities.
Preferably, the H13 high-speed precision forging die steel comprises the following components in percentage by weight:
c: 0.39 percent; si: 1.0 percent; mn: 0.39 percent; cr: 5.2 percent; mo: 1.45 percent; v: 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 80 ppm; o: less than or equal to 20 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.010 percent; s: less than or equal to 0.003 percent; ni: less than or equal to 0.15 percent; al: less than or equal to 0.020%; cu: less than or equal to 0.05 percent; as: less than or equal to 0.010 percent; sn: less than or equal to 0.010 percent; sb: less than or equal to 0.0010 percent; the balance of Fe and inevitable impurities.
The invention also provides a production method of the H13 high-speed precision forging die steel ingot, which comprises the following steps:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 65-75% of the final content, and controlling the content of the C to be 100-plus-one 105% of the final content, then adopting a VOD furnace to deoxidize, adding Cr to control the content of the Cr to be the final content, adding alloy elements needed by steel after deoxidizing in an RH vacuum refining furnace, adding calcium-iron alloy, introducing inert gas, stirring for more than 10min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and (3) forming a billet by die casting or continuous casting of the molten steel.
Preferably, the H13 high-speed precision forging die steel ingot production method uses electromagnetic stirring when producing billets through continuous casting, and the frequency of the electromagnetic stirring is 400 Hz.
Preferably, according to the production method of the H13 high-speed precision forging die steel ingot, the steel ingot is heated to 985 ℃ and is subjected to heat preservation for 1.5H of oil quenching, and is tempered at 435 ℃, and is subjected to heat preservation for 3H and is cooled along with the furnace.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the H13 high-speed precision forging die steel and the steel ingot can obtain the hardness of 45-52 HRC.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.
Examples 1 to 5
Examples 1 to 5 provide a H13 high-speed precision forging die steel and a steel ingot, respectively, comprising, in weight percent, the components shown in table 1:
the balance of Fe and inevitable impurities.
Table 1 examples 1-5 ingredients (wt.%)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| C | 0.4 | 0.4 | 0.39 | 0.38 | 0.37 |
| Si | 1.05 | 1.05 | 1.0 | 0.9 | 0.95 |
| Mn | 0.42 | 0.4 | 0.39 | 0.38 | 0.35 |
| Cr | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 |
| Mo | 1.5 | 1.5 | 1.45 | 1.4 | 1.4 |
| V | 1 | 1 | 1 | 0.9 | 0.9 |
| Ti | 0.008 | 0.007 | 0.006 | 0.007 | 0.007 |
| N | 0.008 | 0.007 | 0.008 | 0.007 | 0.008 |
| O | 0.002 | 0.0018 | 0.0015 | 0.0018 | 0.0019 |
| H | 0.0002 | 0.0002 | 0.0002 | 0.0002 | 0.0002 |
| Ni | 0.2 | 0.18 | 0.16 | 0.17 | 2 |
| Al | 0.028 | 0.026 | 0.025 | 0.026 | 0.028 |
| Cu | 0.08 | 0.07 | 0.06 | 0.07 | 0.08 |
| As | 0.02 | 0.015 | 0.016 | 0.018 | 0.019 |
| Sn | 0.015 | 0.014 | 0.012 | 0.013 | 0.014 |
| Sb | 0.0015 | 0.0014 | 0.0012 | 0.0013 | 0.0014 |
| P | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 |
| S | ≤0.005 | ≤0.003 | ≤0.002 | ≤0.003 | ≤0.004 |
Example 6
A production method of H13 high-speed precision forging die steel ingots comprises the following steps:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 65% of the final content and the content of the C to be 100% of the final content, deoxidizing in a VOD furnace, adding Cr to control the content of the Cr to be the final content, deoxidizing in an RH vacuum refining furnace, adding alloy elements needed in steel, adding calcium-iron alloy, introducing inert gas, stirring for more than 10min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and continuously casting the molten steel to form a billet, wherein electromagnetic stirring is used when the billet is produced by continuous casting, and the frequency of the electromagnetic stirring is 400 Hz. And heating the steel ingot to 985 ℃, preserving heat for 1.5h, performing oil quenching, tempering at 435 ℃, preserving heat for 3 h, and cooling along with the furnace.
Example 7
A production method of H13 high-speed precision forging die steel ingots comprises the following steps:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 70% of the final content and the content of the C to be 102% of the final content, deoxidizing in a VOD furnace, adding Cr to control the content of the Cr to be the final content, deoxidizing in an RH vacuum refining furnace, adding alloy elements needed in steel, adding calcium-iron alloy, introducing inert gas, stirring for more than 15min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and continuously casting the molten steel to form a billet, wherein electromagnetic stirring is used when the billet is produced by continuous casting, and the frequency of the electromagnetic stirring is 400 Hz. And heating the steel ingot to 985 ℃, preserving heat for 1.5h, performing oil quenching, tempering at 435 ℃, preserving heat for 3 h, and cooling along with the furnace.
Example 8
A production method of H13 high-speed precision forging die steel ingots comprises the following steps:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 75% of the final content and the content of the C to be 105% of the final content, deoxidizing in a VOD furnace, adding Cr to control the content of the Cr to be the final content, deoxidizing in an RH vacuum refining furnace, adding alloy elements needed in steel, adding calcium-iron alloy, introducing inert gas, stirring for more than 10min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and continuously casting the molten steel to form a billet, wherein electromagnetic stirring is used when the billet is produced by continuous casting, and the frequency of the electromagnetic stirring is 400 Hz. And heating the steel ingot to 985 ℃, preserving heat for 1.5h, performing oil quenching, tempering at 435 ℃, preserving heat for 3 h, and cooling along with the furnace.
The methods of examples 6 to 8 can make the control of elements more precise, especially the control operation of C and Cr, and can make C and Cr be controlled within the end point range.
Effects of the embodiment
H13 high-speed precision forging die steels and steel ingots (subjected to thermal refining) having the compositions of examples 1 to 5, which were obtained in examples 6 to 8, were prepared into test specimens, and surface hardness tests were performed.
TABLE 2 surface hardness values of H13 high speed precision forging die steels of examples 1-5
| HRC | |
| Example 1 | 49 |
| Example 2 | 50 |
| Example 3 | 52 |
| Example 4 | 46 |
| Example 5 | 45 |
The H13 high-speed precision forging die steel and steel ingot of examples 1-5 can obtain the hardness of 45-52 HRC.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (5)
1. The H13 high-speed precision forging die steel is characterized by comprising the following components in percentage by weight:
c: 0.37% -0.40%; si: 0.95 to 1.05 percent; mn: 0.35 to 0.42 percent; cr: 5.1% -5.3%; mo: 1.40% -1.50%; v: 0.9 to 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 100 ppm; o: less than or equal to 22 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.015 percent; s: less than or equal to 0.005 percent; ni: less than or equal to 0.20 percent; al: less than or equal to 0.028 percent; cu: less than or equal to 0.08 percent; as: less than or equal to 0.020%; sn: less than or equal to 0.015 percent; sb: less than or equal to 0.0015 percent; the balance of Fe and inevitable impurities;
the production method of the H13 high-speed precision forging die steel ingot comprises the following steps:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 65-75% of the final content, and controlling the content of the C to be 100-plus-one 105% of the final content, then adopting a VOD furnace to deoxidize, adding Cr to control the content of the Cr to be the final content, adding alloy elements needed by steel after deoxidizing in an RH vacuum refining furnace, adding calcium-iron alloy, introducing inert gas, stirring for more than 10min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and (3) forming a steel billet by die casting or continuous casting of the molten steel, heating the steel ingot to 985 ℃, preserving heat for 1.5h, performing oil quenching, tempering at 435 ℃, preserving heat for 3 h, and cooling along with the furnace.
2. The H13 high speed precision forging die steel of claim 1, comprising the following components in weight percent:
c: 0.38% -0.40%; si: 0.95 to 1.05 percent; mn: 0.38% -0.40%; cr: 5.1% -5.3%; mo: 1.40% -1.50%; v: 0.9 to 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 100 ppm; o: less than or equal to 22 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.010 percent; s: less than or equal to 0.003 percent; ni: less than or equal to 0.18 percent; al: less than or equal to 0.025 percent; cu: less than or equal to 0.06 percent; as: less than or equal to 0.015 percent; sn: less than or equal to 0.013 percent; sb: less than or equal to 0.0013 percent; the balance of Fe and inevitable impurities.
3. The H13 high speed precision forging die steel of claim 1, comprising the following components in weight percent:
c: 0.39 percent; si: 1.0 percent; mn: 0.39 percent; cr: 5.2 percent; mo: 1.45 percent; v: 1.0 percent; ti is less than or equal to 0.008 percent; n: less than or equal to 80 ppm; o: less than or equal to 20 ppm; h: less than or equal to 2 ppm; p: less than or equal to 0.010 percent; s: less than or equal to 0.003 percent; ni: less than or equal to 0.15 percent; al: less than or equal to 0.020%; cu: less than or equal to 0.05 percent; as: less than or equal to 0.010 percent; sn: less than or equal to 0.010 percent; sb: less than or equal to 0.0010 percent; the balance of Fe and inevitable impurities.
4. A method for producing a H13 high-speed precision forging die steel ingot as claimed in claim 1, characterized by comprising the steps of:
s1: molten steel pretreatment, wherein the molten steel is subjected to molten steel pre-desulfurization by using a KR method, so that the sulfur content is reduced to 0.01%;
s2: smelting in an electric arc furnace, namely adding molten steel, scrap steel and pig iron into the electric arc furnace for smelting until the carbon content is lower than 0.60 percent and the phosphorus content is lower than 0.01 percent, and tapping at the tapping temperature of 1510 ℃;
s3: tapping, namely adding Si and Mn alloy elements for deoxidation in the tapping process, and adding carbon powder and a slagging agent;
s4, refining outside a furnace, namely adding Cr in a L F furnace, performing oxygen blowing and C removal, respectively controlling the content of the Cr to be 65-75% of the final content, and controlling the content of the C to be 100-plus-one 105% of the final content, then adopting a VOD furnace to deoxidize, adding Cr to control the content of the Cr to be the final content, adding alloy elements needed by steel after deoxidizing in an RH vacuum refining furnace, adding calcium-iron alloy, introducing inert gas, stirring for more than 10min, heating the molten steel to 1420 ℃, and adding a covering agent;
s5: and (3) forming a steel billet by die casting or continuous casting of the molten steel, heating the steel ingot to 985 ℃, preserving heat for 1.5h, performing oil quenching, tempering at 435 ℃, preserving heat for 3 h, and cooling along with the furnace.
5. A method of producing a slab of H13 high speed finisher die steel according to claim 4, characterized in that electromagnetic stirring is used when producing the slab by continuous casting, the frequency of electromagnetic stirring being 400 Hz.
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| CN109881097B (en) * | 2019-03-15 | 2020-05-19 | 四川丰元机械制造有限公司 | Production process of high-performance tool and die flat steel |
| CN110106437A (en) * | 2019-03-21 | 2019-08-09 | 山东钢铁股份有限公司 | A kind of H13 mould steel and its production method |
| CN113549732B (en) * | 2021-07-23 | 2022-08-30 | 二重（德阳）重型装备有限公司 | Smelting method of steel grade with Sb less than or equal to 0.001wt% |
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