CN109706385A - A kind of method of electroslag smelting 521A steel - Google Patents
A kind of method of electroslag smelting 521A steel Download PDFInfo
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- CN109706385A CN109706385A CN201711004822.7A CN201711004822A CN109706385A CN 109706385 A CN109706385 A CN 109706385A CN 201711004822 A CN201711004822 A CN 201711004822A CN 109706385 A CN109706385 A CN 109706385A
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Abstract
A kind of method of electroslag smelting 521A steel, the chemical composition mass percent of the 521A steel are as follows: C:0.4-0.7, Si:0.4-0.6, Mn:0.1-0.2, S:0.02-0.03, P:0.015-0.025, Cr:15.2-18.5, V:3.5-6.5, surplus Fe, HRC:30-45；The present invention has high harden ability, hardenability and high wearability；The advantages that high-temperature oxidation resistance is good, and resistant to rust ability is good after quenching and polishing, and heat-treatment distortion is small.
Description
Technical field
The invention belongs to electroslag smelting technical field, the method for specifically a kind of electroslag smelting 521A steel.
Background technique
Hot die steel includes hammer forging die, hot extruding die and compression mod three classes.The main feature of hot-work die operating condition
Be be in contact with thermal state metal, this is the main distinction with cold-working mold work condition.Hot die steel is appropriate to hardness requirement,
Lay particular emphasis on red hardness, thermal conductivity, wearability.Therefore phosphorus content is low, and alloying element improves wearability, red hard to increase harden ability
Based on property.521A is exactly one of hot die steel, and tool high tenacity, wearability and solar heat protection erosion are good, and softening resistant to high temperatures is prevented
Fatigue at high temperature is good, and solderable benefit hot punch, reamer, lipper, grooving cutter, scissors ... wait when being heat-treated, and needs anti-anti-avulsion
Carbon, the produced hardness of Thermal tool steel postwelding is too high also to be ruptured.
The work characteristics of hot extruding die is that loading velocity is slower, and therefore, die cavity heating temperature is higher, usually up to 500-
800℃.Elevated temperature strength (i.e. high temper resistance) and high heat-resistant anti-fatigue to the service performance requirement Ying Yigao of this kind of steel
Based on performance.
Summary of the invention
It is an object of the invention to provide a kind of with high harden ability, hardenability and high wearability；High-temperature oxidation resistant
Performance is good, and resistant to rust ability is good after quenching and polishing, the method for the small electroslag smelting 521A steel of heat-treatment distortion.
A kind of method of electroslag smelting 521A steel of the invention, the chemical composition mass percent of the 521A steel are as follows:
C:0.4-0.7, Si:0.4-0.6, Mn:0.1-0.2, S:0.02-0.03, P:0.015-0.025, Cr:15.2-18.5, V:3.5-
6.5, surplus Fe, HRC:30-45, said components smelt 521A steel the following steps are included:
(1) above-mentioned each group is weighed in proportion and is placed in electric furnace melt, using vacuum degassing furnace melting, last electroslag remelting,
The CaF that proportion is 5:2:3 is added when electroslag remelting2-CaO-Al2O3Ternary slag system；
(2) cool down after ESR ingot demoulding, breaking down can be sent to heat when temperature is down to 200-250 DEG C；
(3) it through spheroidizing blanking and is heat-treated after breaking down heating, first by Heating Steel Ingots to 800-850 DEG C in annealing process
20-40min is kept the temperature, 600-620 DEG C of heat preservation 2-3h is cooled in 2-4min, it is then cooling with the speed of 15-20 DEG C/min again
After come out of the stove；
(4) steel ingot after annealing finally passes through heat treatment process and 521A steel of the invention can be obtained.
The present invention has high harden ability, hardenability and high wearability；High-temperature oxidation resistance is good, after quenching and polishing
The advantages that resistant to rust ability is good, and heat-treatment distortion is small.
Specific embodiment
Embodiment 1
A kind of method of electroslag smelting 521A steel of the present embodiment, the chemical composition mass percent of the 521A steel are as follows: C:
0.65, Si:0.50, Mn:0.15, S:0.025, P:0.022, Cr:16.8, V:5.3, surplus Fe, HRC:41, said components smelting
Refine 521A steel the following steps are included:
(1) above-mentioned each group is weighed in proportion and is placed in electric furnace melt, using vacuum degassing furnace melting, last electroslag remelting,
The CaF that proportion is 5:2:3 is added when electroslag remelting2-CaO-Al2O3Ternary slag system；
(2) cool down after ESR ingot demoulding, breaking down can be sent to heat when temperature is down to 220 DEG C；
(3) it through spheroidizing blanking and is heat-treated after breaking down heating, is first kept the temperature Heating Steel Ingots to 830 DEG C in annealing process
30min is cooled to 610 DEG C of heat preservation 2.5h in 3min, then again to come out of the stove after the speed cooling of 16 DEG C/min；
(4) steel ingot after annealing finally passes through heat treatment process and 521A steel of the invention can be obtained.
Embodiment 2
A kind of method of electroslag smelting 521A steel of the present embodiment, the chemical composition mass percent of the 521A steel are as follows: C:
0.4, Si:0.4, Mn:0.1, S:0.02, P:0.015, Cr:15.2, V:3.5, surplus Fe, HRC:30, said components are smelted
521A steel the following steps are included:
(1) above-mentioned each group is weighed in proportion and is placed in electric furnace melt, using vacuum degassing furnace melting, last electroslag remelting,
The CaF that proportion is 5:2:3 is added when electroslag remelting2-CaO-Al2O3Ternary slag system；
(2) cool down after ESR ingot demoulding, breaking down can be sent to heat when temperature is down to 200 DEG C；
(3) it through spheroidizing blanking and is heat-treated after breaking down heating, is first kept the temperature Heating Steel Ingots to 800 DEG C in annealing process
20min is cooled to 600 DEG C of heat preservation 2h in 2min, then again to come out of the stove after the speed cooling of 15 DEG C/min；
(4) steel ingot after annealing finally passes through heat treatment process and 521A steel of the invention can be obtained.
Embodiment 3
A kind of method of electroslag smelting 521A steel of the present embodiment, the chemical composition mass percent of the 521A steel are as follows: C:
0.7, Si:0.6, Mn:0.2, S:0.03, P:0.025, Cr:18.5, V:6.5, surplus Fe, HRC:45, said components are smelted
521A steel the following steps are included:
(1) above-mentioned each group is weighed in proportion and is placed in electric furnace melt, using vacuum degassing furnace melting, last electroslag remelting,
The CaF that proportion is 5:2:3 is added when electroslag remelting2-CaO-Al2O3Ternary slag system；
(2) cool down after ESR ingot demoulding, breaking down can be sent to heat when temperature is down to 250 DEG C；
(3) it through spheroidizing blanking and is heat-treated after breaking down heating, is first kept the temperature Heating Steel Ingots to 850 DEG C in annealing process
40min is cooled to 620 DEG C of heat preservation 3h in 4min, then again to come out of the stove after the speed cooling of 20 DEG C/min；
(4) steel ingot after annealing finally passes through heat treatment process and 521A steel of the invention can be obtained.
Claims (1)
1. a kind of method of electroslag smelting 521A steel, it is characterised in that: the chemical composition mass percent of the 521A steel is as follows:
C:0.4-0.7, Si:0.4-0.6, Mn:0.1-0.2, S:0.02-0.03, P:0.015-0.025, Cr:15.2-18.5, V:3.5-
6.5, surplus Fe, HRC:30-45, said components smelt 521A steel the following steps are included:
(1) above-mentioned each group is weighed in proportion and is placed in electric furnace melt, using vacuum degassing furnace melting, last electroslag remelting,
The CaF that proportion is 5:2:3 is added when electroslag remelting2-CaO-Al2O3Ternary slag system；
(2) cool down after ESR ingot demoulding, breaking down can be sent to heat when temperature is down to 200-250 DEG C；
(3) it through spheroidizing blanking and is heat-treated after breaking down heating, first by Heating Steel Ingots to 800-850 DEG C in annealing process
20-40min is kept the temperature, 600-620 DEG C of heat preservation 2-3h is cooled in 2-4min, it is then cooling with the speed of 15-20 DEG C/min again
After come out of the stove；
(4) steel ingot after annealing finally passes through heat treatment process and 521A steel of the invention can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004822.7A CN109706385A (en) | 2017-10-25 | 2017-10-25 | A kind of method of electroslag smelting 521A steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004822.7A CN109706385A (en) | 2017-10-25 | 2017-10-25 | A kind of method of electroslag smelting 521A steel |
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| CN109706385A true CN109706385A (en) | 2019-05-03 |
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| CN201711004822.7A Pending CN109706385A (en) | 2017-10-25 | 2017-10-25 | A kind of method of electroslag smelting 521A steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223660A1 (en) * | 2020-05-06 | 2021-11-11 | 宝山钢铁股份有限公司 | Process for smelting steel for ultrafine carborundum wire |
-
2017
- 2017-10-25 CN CN201711004822.7A patent/CN109706385A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223660A1 (en) * | 2020-05-06 | 2021-11-11 | 宝山钢铁股份有限公司 | Process for smelting steel for ultrafine carborundum wire |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190503 |
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| WD01 | Invention patent application deemed withdrawn after publication |