CN102517500A - Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets - Google Patents
Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets Download PDFInfo
- Publication number
- CN102517500A CN102517500A CN2011104226179A CN201110422617A CN102517500A CN 102517500 A CN102517500 A CN 102517500A CN 2011104226179 A CN2011104226179 A CN 2011104226179A CN 201110422617 A CN201110422617 A CN 201110422617A CN 102517500 A CN102517500 A CN 102517500A
- Authority
- CN
- China
- Prior art keywords
- rolling
- temperature
- alloy cold
- steel
- rolling process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention which relates to a rolling process for producing 35CrMo alloy cold forging steel through adopting small billets belongs to the technical field of molding. The rolling process comprises the following steps: 1, heating the billets to 1030-1080DEG C, and maintaining the temperature for 1.5-2.5h; 2, hot-rolling after the temperature maintenance, and controlling the bloom rolling temperature at 950-1000DEG C, the finish rolling inlet temperature at 880-920DEG C, the reducing and sizing inlet temperature at 870-920DEG C and the spinning temperature at 850-900DEG C; and 3, cooling in a Stelmor line cooling mode: delay-cooling. Phi8-12mm wire rods produced through rolling have the following structure and mechanical properties: the tissue comprises ferrite and pearlite, the tensile strength is 660-735Mpa, the reduction of area is 48-64%, and the half radius hardness (HRB) of a cross section is 82-95.
Description
Technical field
The invention belongs to field shaping technique, relate to a kind of hot-rolling method that adopts little square billet to produce 35CrMo alloy The cold heading steel.
Background technology
35CrMo alloy cold heading steel is mainly as standardized component and the important structure part that is applied to work under the high loading such as 10.9~12.9 grades of socket head cap screws of manufacturing HS; Like the driving member of vehicle and mover, the transmission shaft of the rotor of turbo-generator, main shaft, heavy lift etc.
Produce the 35CrMo steel grade except that requiring to have the good slab quality, because of containing Cr, Mo alloying element, and the comprehensive action of Cr and Mo can improve the stability of supercooled austenite, significantly to prevent thickization of austenite crystal in the steel.Therefore, when rolling 35CrMo alloy cold heading steel, controlled rolling and controlled cooling (TMCP) technology is particularly crucial.The present invention is intended to adopt the little square billet of 150mm section to produce 35CrMo alloy cold heading steel, does not see relevant report.
Summary of the invention
The objective of the invention is to disclose a kind of method of producing 35CrMo alloy cold heading steel with the little billet rolling of 150mm section.
Technical solution:, adopt little square billet rolling 35CrMo alloy cold heading steel on high-speed rod-rolling mill of 150mm section through to the appropriate design of 35CrMo alloy cold heading steel composition and the control of TMCP technology.
Technical scheme of the present invention is achieved in that
35CrMo alloy cold heading steel provided by the invention, its chemical ingredients (mass percent) is: C:0.32~0.40%, Si:0.15~0.35%; Mn:0.6~0.90%; P :≤0.035%, S :≤0.035%, Cr :≤0.8~1.1%; Mo :≤0.15~0.25%, all the other are matrix Fe and the trace element that can't detect.
The present invention adopts the little square billet of the 150mm section with above-mentioned chemical ingredients on high-speed rod-rolling mill, to produce 35CrMo alloy The cold heading steel; Carry out temperature control in the operation of rolling; Take delayed quench after rolling; Accomplish phase transformation under the cooling rate slowly in the stay-warm case on the stelmor roller-way, obtain ferritic and add pearlitic structure.Concrete rolling method carries out according to the following steps:
(1) steel billet is heated to 1030~1080 ℃, is incubated 1.5~2.5 hours;
(2) carry out hot rolling after the insulation, the control start rolling temperature is 950~1000 ℃; The finish rolling temperature in is 880~920 ℃; Subtract 870~920 ℃ of sizing temperature ins; 850~900 ℃ of laying temperatures;
(3) the Stevr line type of cooling of rubbing: delayed quench.
Description of drawings
Fig. 1 organizes photo for φ 8mm wire rod;
Fig. 2 organizes photo for φ 10mm wire rod;
Fig. 3 organizes photo for φ 12mm wire rod.
Embodiment
Below in conjunction with embodiment the present invention is further described.
Embodiment 1
Select little square billet Rolling Production φ 8~φ 12mm wire rod on high-speed rod-rolling mill of 150mm section, its chemical Composition Control such as table 1, and be rolled by following rolling method:
(1) steel billet is heated to 1050 ℃, is incubated 1.5 hours;
(2) carry out hot rolling after the insulation, the control start rolling temperature is 980 ℃; The finish rolling temperature in is 900 ℃; Subtract 880 ℃ of sizing temperature ins; 860 ℃ of laying temperatures; Finish to gauge speed: φ 8mm is 90m/s, and φ 10mm is 60m/s, and φ 12mm is 40m/s;
(3) the Stevr line type of cooling of rubbing: delayed quench.
Wire rod is organized and mechanical properties test, and φ 8mm wire rod organizes photo to see Fig. 1, and its tissue is mainly ferritic and adds perlite, and wherein 1/2 radius has the martensite less than 5% to the center, and it is 11 grades that 1/2 radius is organized grain fineness number.The photo of organizing of φ 10mm, φ 12mm wire rod is seen Fig. 2, Fig. 3, and its tissue is ferritic and adds perlite, and 1/2 radius organizes grain fineness number to be respectively 10.5,10 grades.Wire rod hot rolling attitude mechanical property detected value is seen table 2, and the tissue of wire rod φ 8mm~φ 12mm and mechanical property satisfy the requirement of 35CrMo steel in the relevant criterion.
Table 1 35CrMo alloy cold heading steel chemical Composition Control (mass percent %)
C | Si | Mn | P | S | Cr | Mo |
0.33 | 0.30 | 0.80 | 0.02 | 0.009 | 0.90 | 0.15 |
The mechanical property of table 2 35CrMo alloy cold heading steel gren rod
Claims (2)
1. rolling method that adopts little square billet to produce 35CrMo alloy cold heading steel, the chemical Composition Control that it is characterized in that steel be at (mass percent): C:0.32~0.40%, Si:0.15~0.35%; Mn:0.6~0.90%; P :≤0.035%, S :≤0.035%, Cr :≤0.8~1.1%; Mo :≤0.15~0.25%, all the other are matrix Fe and the trace element that can't detect.
2. characteristic a kind of adopts little square billet to produce the rolling method of 35CrMo alloy cold heading steel according to claim 1, it is characterized in that:
(1) steel billet is heated to 1030~1080 ℃, is incubated 1.5~2.5 hours;
(2) carry out hot rolling after the insulation, the control start rolling temperature is 950~1000 ℃; The finish rolling temperature in is 880~920 ℃; Subtract 870~920 ℃ of sizing temperature ins; 850~900 ℃ of laying temperatures;
(3) the Stevr line type of cooling of rubbing: delayed quench.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011104226179A CN102517500A (en) | 2011-12-16 | 2011-12-16 | Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011104226179A CN102517500A (en) | 2011-12-16 | 2011-12-16 | Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets |
Publications (1)
Publication Number | Publication Date |
---|---|
CN102517500A true CN102517500A (en) | 2012-06-27 |
Family
ID=46288559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011104226179A Pending CN102517500A (en) | 2011-12-16 | 2011-12-16 | Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102517500A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103498104A (en) * | 2013-09-26 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof |
CN105296865A (en) * | 2014-06-09 | 2016-02-03 | 鞍钢股份有限公司 | Production method of medium-carbon chromium-containing cold heading steel wire rod |
CN105312525A (en) * | 2014-07-16 | 2016-02-10 | 鞍钢股份有限公司 | Method for reducing ingot type segregation of 40Cr cold heading steel wire rod |
CN105349882A (en) * | 2015-11-17 | 2016-02-24 | 河北金奥管业有限公司 | High-strength 35 CrMo steel pipe for automobile hollow stabilizer bar |
CN103952633B (en) * | 2014-04-30 | 2016-08-24 | 邢台钢铁有限责任公司 | There is high-strength steel wire and the production method thereof of favorable low-temperature impact toughness |
CN106424158A (en) * | 2016-09-29 | 2017-02-22 | 西宁特殊钢股份有限公司 | Rolling method capable of reducing as-rolled hardness of 42CrMo steel |
CN108330391A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Chromium-molybdenum alloy cold heading steel wire rod and production method thereof |
CN109136757A (en) * | 2018-09-05 | 2019-01-04 | 包头钢铁(集团)有限责任公司 | The production method of medium carbon cold heading steel wire rod and medium carbon cold heading steel wire rod |
CN115772595A (en) * | 2022-11-17 | 2023-03-10 | 包头钢铁(集团)有限责任公司 | Preparation method of phi 8mm low-cost high-quality high-strength fine-grain hot-rolled wire rod |
CN116536594A (en) * | 2023-03-31 | 2023-08-04 | 本钢板材股份有限公司 | CrMo alloy steel rolling and cooling control method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101045238A (en) * | 2007-04-30 | 2007-10-03 | 马鞍山钢铁股份有限公司 | Online softening rolling method for medium carbon alloy cold forging steel |
CN101812644A (en) * | 2010-03-19 | 2010-08-25 | 江苏省沙钢钢铁研究院有限公司 | Non-quenched and tempered cold forging steel for high-strength fastener and manufacturing method thereof |
-
2011
- 2011-12-16 CN CN2011104226179A patent/CN102517500A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101045238A (en) * | 2007-04-30 | 2007-10-03 | 马鞍山钢铁股份有限公司 | Online softening rolling method for medium carbon alloy cold forging steel |
CN101812644A (en) * | 2010-03-19 | 2010-08-25 | 江苏省沙钢钢铁研究院有限公司 | Non-quenched and tempered cold forging steel for high-strength fastener and manufacturing method thereof |
Non-Patent Citations (1)
Title |
---|
孙浩然: "冷镦标准件用热轧盘条SCM435的研制", 《金属制品》 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103498104B (en) * | 2013-09-26 | 2015-06-24 | 江苏天舜金属材料集团有限公司 | 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof |
CN103498104A (en) * | 2013-09-26 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | 630 MPa-grade high-strength hot-rolled reinforced bar and production process thereof |
CN103952633B (en) * | 2014-04-30 | 2016-08-24 | 邢台钢铁有限责任公司 | There is high-strength steel wire and the production method thereof of favorable low-temperature impact toughness |
CN105296865A (en) * | 2014-06-09 | 2016-02-03 | 鞍钢股份有限公司 | Production method of medium-carbon chromium-containing cold heading steel wire rod |
CN105312525B (en) * | 2014-07-16 | 2018-01-05 | 鞍钢股份有限公司 | Method for reducing ingot type segregation of 40Cr cold heading steel wire rod |
CN105312525A (en) * | 2014-07-16 | 2016-02-10 | 鞍钢股份有限公司 | Method for reducing ingot type segregation of 40Cr cold heading steel wire rod |
CN105349882A (en) * | 2015-11-17 | 2016-02-24 | 河北金奥管业有限公司 | High-strength 35 CrMo steel pipe for automobile hollow stabilizer bar |
CN106424158A (en) * | 2016-09-29 | 2017-02-22 | 西宁特殊钢股份有限公司 | Rolling method capable of reducing as-rolled hardness of 42CrMo steel |
CN108330391A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Chromium-molybdenum alloy cold heading steel wire rod and production method thereof |
CN108330391B (en) * | 2018-02-13 | 2020-07-17 | 鞍钢股份有限公司 | Chromium-molybdenum alloy cold heading steel wire rod and production method thereof |
CN109136757A (en) * | 2018-09-05 | 2019-01-04 | 包头钢铁(集团)有限责任公司 | The production method of medium carbon cold heading steel wire rod and medium carbon cold heading steel wire rod |
CN109136757B (en) * | 2018-09-05 | 2020-10-27 | 包头钢铁(集团)有限责任公司 | Production method of medium-carbon cold heading steel wire and medium-carbon cold heading steel wire |
CN115772595A (en) * | 2022-11-17 | 2023-03-10 | 包头钢铁(集团)有限责任公司 | Preparation method of phi 8mm low-cost high-quality high-strength fine-grain hot-rolled wire rod |
CN116536594A (en) * | 2023-03-31 | 2023-08-04 | 本钢板材股份有限公司 | CrMo alloy steel rolling and cooling control method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102517500A (en) | Rolling process for producing 35CrMo alloy cold forging steel through adopting small billets | |
CN102671938B (en) | High speed production method for controlling banded structure of low carbon steel wire rod | |
CN102676929B (en) | Method for manufacturing spheroidizing-free high-quality high-strength cold forging steel | |
CN102560253B (en) | Manufacturing method of high-quality cold heading steel with uniform structure property | |
CN111659731B (en) | Pearlite spheroidizing method based on high-speed wire rod production line | |
CN103316929B (en) | Rolling and cooling technology method for reducing GCR15 bearing steel zonary carbide level | |
JP6586519B2 (en) | On-line controlled cooling method and manufacturing method for seamless steel pipes for effective grain refinement | |
CN109023103B (en) | Production method of bainite cold heading steel wire rod | |
CN103789686B (en) | A kind of thermal treatment process eliminating hydrogenator steel reinforced concrete crystalline substance, open grain structure | |
CN102808131A (en) | Method for manufacturing high-quality high-strength cold forging steel with uniform texture performance | |
CN102418033B (en) | Heat-treatment-free high-strength cold heading steel and production method for hot rolled bar of heat-treatment-free high-strength cold heading steel | |
CN110904318B (en) | Controlled rolling and controlled cooling method for improving ferrite proportion of medium-carbon cold heading steel wire rod | |
CN101994059B (en) | Thick-wall X70 pipeline steel coil plate and production method thereof | |
CN103866095B (en) | A kind of spheroidizing method for being directed to Cr, Mo steel with sheet microstructure | |
CN103966411B (en) | A kind of manufacture method of medium carbon cold heading steel Bar Wire Product | |
CN101928878B (en) | Axle shaft steel and production method thereof | |
CN102703803B (en) | Globular pearlite type hot rolled coil and production method thereof | |
CN101717886A (en) | Hot-rolled dual-phase steel plate with 650 MPa-level tensile strength and manufacturing method thereof | |
CN101456032A (en) | Production method of carbon cold-forging steel large coil for 8.8 level high-intensity fasteners | |
CN104988409A (en) | Non-annealed cold forging steel hot-rolled wire rod and production method thereof | |
CN105296865A (en) | Production method of medium-carbon chromium-containing cold heading steel wire rod | |
CN101624688A (en) | X70 station yard steel with excellent toughness and large wall thickness and production method thereof | |
CN102719735A (en) | Superfine crystal grain hot-rolled dual-phase steel plate for automobile and production method thereof | |
CN109735699A (en) | The production method for preventing the no remarkable yield point of hot rolled ribbed bars containing niobium | |
CN102716902A (en) | Method for rolling SCM435 steel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120627 |