CN102399974A - Heating method for two-phase stainless steel square blanks - Google Patents
Heating method for two-phase stainless steel square blanks Download PDFInfo
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- CN102399974A CN102399974A CN2011103434691A CN201110343469A CN102399974A CN 102399974 A CN102399974 A CN 102399974A CN 2011103434691 A CN2011103434691 A CN 2011103434691A CN 201110343469 A CN201110343469 A CN 201110343469A CN 102399974 A CN102399974 A CN 102399974A
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Abstract
The invention relates to a heating method for two-phase stainless steel square blanks, which sequentially comprises the concrete steps of: (1) coating: coating the surfaces of the two-phase stainless steel square blanks with coating materials at the coating thickness being 0.2 to 0.5mm; (2) drying and preheating: immediately loading the square blanks into a continuous heating furnace to be dried and preheated after the square blank coating, wherein the furnace temperature is required to be 500 DEG C, and the drying and preheating time is 1.5 to 2hours; (3) heating: heating the square blanks at a heating section at the heating temperature being 1150 to 1170 DEG C for 1.5 to 2hours; and (4) soaking: fast raising the temperature of the square blanks to be 1220 to 1250 DEG C for soaking at a uniform heating section for 45minutes and then carrying out furnace discharge milling. The heating method has the advantages that the heating effect can be ensured, too long or too short double-phase stainless steel heating time is avoided, and the defects of poor finished product performance and the like caused by heating steel adhesion, milling crack, milling difficulty and improper two-phase proportion are prevented from occurring.
Description
Technical field
The invention belongs to and producing duplex stainless steel bar steel rolling field, particularly the duplex stainless steel trade mark is the heating means of 022Cr22Ni5mo3N and 022Cr23Ni5mo3N.
Background technology
Duplex stainless steel belongs to the novel stainless steel, because it exists austenite and ferritic phase simultaneously, duplex stainless steel is compared with common stainless steel; Its intensity is higher, and corrosion resisting property is better, more practices thrift valuable alloy; Cost performance is higher, is stainless in recent years developing direction.
But because two-phase stainless smelting steel, rolling difficulty are bigger, the key link of its operation of rolling is at heating process, and temperature is too high, is prone to crackle; Temperature is low excessively, and resistance to deformation is bigger, can not be rolling smoothly; Heating process also can have influence on austenite and ratio of ferrite in the finished product simultaneously, and end properties is impacted.
Summary of the invention
The present invention proposes a kind of heating means of two-phase stainless billet, it can eliminate the duplex stainless steel trade mark is that 022Cr22Ni5mo3N and 022Cr23Ni5mo3N type two-phase stainless billet are produced heating steel bonding, rolling crack in the bar, rolled the defective motionless, that end properties does not conform to.
The present invention includes coating, drying and forewarm, heating, soaking process procedure, concrete steps are in regular turn:
1, coating: coating is carried out on two-phase stainless billet surface, and coat-thickness is 0.2-0.5mm;
2, drying and forewarm: after the square billet coating, pack immediately that continuous furnace is dried and preheating into, it is 500 ℃ that furnace temperature requires, and the drying and forewarm time is 1.5-2 hour;
3, heating: square billet is heated in heating zone, and the heating zone temperature is 1150-1170 ℃, and be 1.5-2 hour heat-up time;
4, soaking: square billet is carried out soaking in the quick temperature raising of soaking zone temperature to being 1220-1250 ℃, and soaking time is 45 minutes, and it is rolling to come out of the stove then.
The preparation method of said coated material is: with 108 glue, water glass, the chamotte ratio of 1:1:10 by weight of blocking up, add suitable quantity of water again, stir into pasty state.Existing with existing preparation.
The present invention is through the temperature and time of brush applied coating with each section of control heating rationally; Can guarantee the effect that heats; Avoided duplex stainless steel long or too short heat-up time, prevented heating steel bonding, rolling crack, roll defectives such as motionless, that the improper end properties that causes of two-phase ratio does not conform to.
Embodiment
The sequential steps of present embodiment is:
1, the preparation of coating: with 108 glue, water glass, the chamotte ratio of 1:1:10 by weight of blocking up, add suitable quantity of water again, stir into pasty state.
2, the coating that with brush step 1 is prepared is coated onto two-phase stainless billet surface, and coat-thickness is 0.4mm.
3, after the square billet coating, pack immediately that continuous furnace is dried and preheating into, it is 500 ℃ that furnace temperature requires, and the residence time is 2 hours.
4, square billet is heated in heating zone, the heating zone temperature is 1150-1170 ℃, and be 1.5 hours heat-up time;
5, with square billet in the quick temperature raising of soaking zone temperature to for 1220-1250 ℃, soaking time is 45 minutes.
Claims (2)
1. the heating means of a two-phase stainless billet is characterized in that comprising coating, drying and forewarm, heating, soaking process procedure, and concrete steps are in regular turn:
(1), coating: two-phase stainless billet coating for surfaces material is carried out coating, and coat-thickness is 0.2-0.5mm;
(2), drying and forewarm: after the square billet coating, pack immediately that continuous furnace is dried and preheating into, it is 500 ℃ that furnace temperature requires, and the drying and forewarm time is 1.5-2 hour;
(3), heating: square billet is heated in heating zone, and the heating zone temperature is 1150-1170 ℃, and be 1.5-2 hour heat-up time;
(4), soaking: square billet is carried out soaking in the quick temperature raising of soaking zone temperature to being 1220-1250 ℃, and soaking time is 45 minutes, and it is rolling to come out of the stove then.
2. the heating means of a kind of stainless steel billet according to claim 1 is characterized in that the preparation method of described coated material is: with 108 glue, water glass, the chamotte ratio of 1:1:10 by weight of blocking up, add suitable quantity of water again, stir into pasty state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110343469 CN102399974B (en) | 2011-11-03 | 2011-11-03 | Heating method for two-phase stainless steel square blanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110343469 CN102399974B (en) | 2011-11-03 | 2011-11-03 | Heating method for two-phase stainless steel square blanks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102399974A true CN102399974A (en) | 2012-04-04 |
| CN102399974B CN102399974B (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201110343469 Active CN102399974B (en) | 2011-11-03 | 2011-11-03 | Heating method for two-phase stainless steel square blanks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773266A (en) * | 2012-06-12 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Method for rolling double-phase stainless steel pipe blank |
| CN103667672A (en) * | 2013-12-05 | 2014-03-26 | 天津钢铁集团有限公司 | Technology for inhibiting bending of heated small square-billet bearing steel |
| CN104451112A (en) * | 2014-10-24 | 2015-03-25 | 永兴特种不锈钢股份有限公司 | Method for heating double-phase stainless steel continuous casting billet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220443A (en) * | 2008-01-22 | 2008-07-16 | 江苏长盈不锈钢管有限公司 | Stainless steel weldless steel tube for ship and producing technique |
| CN101812647A (en) * | 2009-02-25 | 2010-08-25 | 宝山钢铁股份有限公司 | Diphase stainless steel and manufacturing method thereof |
-
2011
- 2011-11-03 CN CN 201110343469 patent/CN102399974B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220443A (en) * | 2008-01-22 | 2008-07-16 | 江苏长盈不锈钢管有限公司 | Stainless steel weldless steel tube for ship and producing technique |
| CN101812647A (en) * | 2009-02-25 | 2010-08-25 | 宝山钢铁股份有限公司 | Diphase stainless steel and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773266A (en) * | 2012-06-12 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Method for rolling double-phase stainless steel pipe blank |
| CN103667672A (en) * | 2013-12-05 | 2014-03-26 | 天津钢铁集团有限公司 | Technology for inhibiting bending of heated small square-billet bearing steel |
| CN103667672B (en) * | 2013-12-05 | 2015-09-09 | 天津钢铁集团有限公司 | A kind of processing method suppressing small billet bearing steel to add hot bending steel |
| CN104451112A (en) * | 2014-10-24 | 2015-03-25 | 永兴特种不锈钢股份有限公司 | Method for heating double-phase stainless steel continuous casting billet |
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| Publication number | Publication date |
|---|---|
| CN102399974B (en) | 2013-05-22 |
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