CN102399954A - Variable-temperature treatment fast nodulizing method for high-carbon pearlite steel - Google Patents
Variable-temperature treatment fast nodulizing method for high-carbon pearlite steel Download PDFInfo
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- CN102399954A CN102399954A CN2011103819872A CN201110381987A CN102399954A CN 102399954 A CN102399954 A CN 102399954A CN 2011103819872 A CN2011103819872 A CN 2011103819872A CN 201110381987 A CN201110381987 A CN 201110381987A CN 102399954 A CN102399954 A CN 102399954A
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Abstract
The invention relates to a variable-temperature treatment fast nodulizing method for high-carbon pearlite steel, which adopts a resistance furnace or a fuel gas furnace for heating the high-carbon pearlite steel with the carbon equivalent higher than 0.8 percent to 710 to 770 DEG C at a speed being 40 to 100 DEG C/min, the heat insulation time is controlled to be within 5min, then, the temperature in the furnace is reduced to 680 to 740 DEG C at a speed being 1 to 10 DEG C/min, the heat insulation does not exceed 15 min, the variable-temperature treatment is repeated for more than twice, and then, the materials are cooled to room temperature through air cooling or furnace cooling. The equipment adopted by the method is simple and ordinary, the process controllability is high, the operation is simple, the nodulizing time is shortened by more than 60 percent, and the nodulizing effect is good.
Description
Technical field
The present invention relates to the heat treating method of the heat treating method of metal, particularly high carbon steel.
Background technology
The steel of hot rolling attitude or forging attitude; When practical application, much need carry out Spheroidizing Annealing, with processing characteristics and the usage condition that satisfies part; The Spheroidizing Annealing of steel needs the long time just can reach corresponding effects usually, and the production cost that improves so greatly also extends manufacture cycle.At present, about the carbide annealing process of different steel, all fail to address this problem preferably.
Patent (application number CN 85101950A) " high-carbon high-temperature low-alloy steel deformation carbide annealing process " adopts the method for deformation to promote the nodularization of high carbon steel cementite, and soaking time still was not less than 3 hours but it is annealed; Patent (publication number CN 1256320A) " carbide annealing process of high-speed great-deformation hot-rolled and cold-upset steel carbide "; Carbide annealing process to carbon equivalent 0.15-0.65 %wt HRS; It adopts the annealing that is lower than 660-720 ℃ of interval under the AC1 temperature, and the samming time was not less than 3 hours; Patent (publication number CN 1265427A) " the Spheroidizing Annealing method of hypoeutectoid low alloy steel "; It is lower than a kind of carbide annealing process of the hypoeutectoid steel of 0.77%wt to carbon content; Adopt respectively and repeating insulation between the A1-A3 temperature with under two temperature that are starkly lower than the A1 temperature; Realize the nodularization of hypoeutectoid steel, its nodularization soaking time was not less than 4 hours.Current, the carbide annealing process of employing all is unrealized and carbon content is higher than the nodularization of high carbon steel within a short period of time of 0.8%wt.
Summary of the invention
The object of the present invention is to provide a kind of high-carbon perlitic steel alternating temperature simple to operate, that the nodularization time is short, nodularization is effective to handle quick spheronization process.
Spheronization process of the present invention is following:
Adopt resistance furnace or gas furnace, carbon equivalent is heated to a little more than A with 40～100 ℃/min speed greater than 0.8% high-carbon perlitic steel
1710～770 ℃ of temperature, soaking time were controlled in 15 minutes, realized the mixed structure of uneven austenite of carbon distribution and cementite, used 1～10 ℃/min speed descent of temperature to be cooled to a little less than A then
1680～740 ℃ of temperature, insulation is no more than 15 minutes, makes austenite carbide precipitate particle, and one time alternating temperature technology is accomplished.So alternating temperature is handled repetition more than 2 times, and then air cooling or stove are as cold as room temperature, can realize the nodularization of high carbon steel perlitic steel carbide.
The present invention compared with prior art has following advantage:
1, employing equipment is simply general, and process controllability is strong, and is simple to operate.
2, the nodularization time shortens more than 60%, and nodularization is effective.
Description of drawings
Fig. 1 be the high carbon steel that obtains of the embodiment of the invention 1 organize Electronic Speculum figure.
Fig. 2 be the high carbon steel that obtains of the embodiment of the invention 2 organize Electronic Speculum figure.
Embodiment
Embodiment 1
Adopt chamber type electric resistance furnace, GCr15 high carbon steel is heated to 710 ℃ with 40 ℃/min speed, be incubated 3 min; Min is cooled to 680 ℃ times spent 4 then, is incubated 3 min, and one time the alternating temperature treatment process is accomplished; So repeat 3 times, carry out temperature cycling and handle, stove is chilled to room temperature then.As shown in Figure 1, the complete nodularization of the carbide of treated high carbon steel, the entire treatment process is times spent 30 min (remove and begin heating and last process of cooling) only.
Embodiment 2
Adopt chamber type electric resistance furnace, GCr15 high carbon steel is heated to 740 ℃ with 60 ℃/min speed, be incubated 3 min; Min is cooled to 710 ℃ times spent 5 then, is incubated 4 min, and one time the alternating temperature treatment process is accomplished; So repeat 3 times, carry out temperature cycling and handle, air cooling is to room temperature then.As shown in Figure 2, the complete nodularization of the carbide of treated high carbon steel, the entire treatment process is times spent 36 min (remove and begin heating and last process air cooler) only.
Embodiment 3
Adopt gas furnace, the T10 steel is heated to 770 ℃ with 100 ℃/min speed, be incubated 4 min; Min is cooled to 740 ℃ times spent 6 then, is incubated 3 min, and one time the alternating temperature treatment process is accomplished; So repeat 3 times, carry out temperature cycling and handle, air cooling is to room temperature then; Realized the quick nodularization of the cementite of T10 steel equally, and nodularization rate 100%.
Claims (1)
1. a high-carbon perlitic steel alternating temperature is handled quick spheronization process, it is characterized in that: adopt resistance furnace or gas furnace, carbon equivalent is heated to a little more than A with 40～100 ℃/min speed greater than 0.8% high-carbon perlitic steel
1710～770 ℃ of temperature, soaking time were controlled in 15 minutes, used 1～10 ℃/min speed descent of temperature to be cooled to a little less than A then
1680～740 ℃ of temperature, insulation is no more than 15 minutes, and so alternating temperature is handled repetition more than 2 times, and then air cooling or stove are as cold as room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103819872A CN102399954A (en) | 2011-11-28 | 2011-11-28 | Variable-temperature treatment fast nodulizing method for high-carbon pearlite steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103819872A CN102399954A (en) | 2011-11-28 | 2011-11-28 | Variable-temperature treatment fast nodulizing method for high-carbon pearlite steel |
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| CN102399954A true CN102399954A (en) | 2012-04-04 |
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| CN2011103819872A Pending CN102399954A (en) | 2011-11-28 | 2011-11-28 | Variable-temperature treatment fast nodulizing method for high-carbon pearlite steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898428A (en) * | 2014-03-14 | 2014-07-02 | 西北工业大学 | Repeated annealing and spheroidizing method of flake alpha in near alpha titanium alloy hybrid structure |
| CN106555038A (en) * | 2015-09-28 | 2017-04-05 | 科华控股股份有限公司 | Improve the spheroidizing method of high alloy magnesium iron mechanical performance |
| CN111961814A (en) * | 2020-07-30 | 2020-11-20 | 佛山市高明基业冷轧钢板有限公司 | Spheroidizing annealing process for high-carbon steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723026A (en) * | 1980-07-14 | 1982-02-06 | Kobe Steel Ltd | Spheroidization treatment for bar steel material |
| JPH01234519A (en) * | 1988-03-14 | 1989-09-19 | Sumitomo Metal Ind Ltd | Spheroidizing heat treatment method for high carbon bearing steel for short time |
| JPH08246040A (en) * | 1995-03-06 | 1996-09-24 | Sumitomo Metal Ind Ltd | Rapid continuous spheroidizing annealing method for steel |
| CN1232877A (en) * | 1998-03-16 | 1999-10-27 | 奥瓦科钢铁股份公司 | Method for soft annealing of high carbon steel |
| CN101845540A (en) * | 2009-03-26 | 2010-09-29 | 上海祝桥金属冲压延有限公司 | Ultra-high strength cold-rolled steel strip nodularization annealing process |
-
2011
- 2011-11-28 CN CN2011103819872A patent/CN102399954A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723026A (en) * | 1980-07-14 | 1982-02-06 | Kobe Steel Ltd | Spheroidization treatment for bar steel material |
| JPH01234519A (en) * | 1988-03-14 | 1989-09-19 | Sumitomo Metal Ind Ltd | Spheroidizing heat treatment method for high carbon bearing steel for short time |
| JPH08246040A (en) * | 1995-03-06 | 1996-09-24 | Sumitomo Metal Ind Ltd | Rapid continuous spheroidizing annealing method for steel |
| CN1232877A (en) * | 1998-03-16 | 1999-10-27 | 奥瓦科钢铁股份公司 | Method for soft annealing of high carbon steel |
| CN101845540A (en) * | 2009-03-26 | 2010-09-29 | 上海祝桥金属冲压延有限公司 | Ultra-high strength cold-rolled steel strip nodularization annealing process |
Non-Patent Citations (2)
| Title |
|---|
| 杨仁山: "40Cr钢的快速循环球化退火的研究", 《热加工工艺》, no. 03, 20 May 1993 (1993-05-20) * |
| 王西军: "高速钢刀具的循环球化退火", 《金属热处理》, no. 4, 30 April 1990 (1990-04-30) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898428A (en) * | 2014-03-14 | 2014-07-02 | 西北工业大学 | Repeated annealing and spheroidizing method of flake alpha in near alpha titanium alloy hybrid structure |
| CN103898428B (en) * | 2014-03-14 | 2015-10-28 | 西北工业大学 | In near αtitanium alloy mixed structure, sheet α's repeats spheronization process of annealing |
| CN106555038A (en) * | 2015-09-28 | 2017-04-05 | 科华控股股份有限公司 | Improve the spheroidizing method of high alloy magnesium iron mechanical performance |
| CN111961814A (en) * | 2020-07-30 | 2020-11-20 | 佛山市高明基业冷轧钢板有限公司 | Spheroidizing annealing process for high-carbon steel |
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Application publication date: 20120404 |