CN105256116A - Hot press molding method for spherical head made of 10CrNi3MoV steel - Google Patents

Hot press molding method for spherical head made of 10CrNi3MoV steel Download PDF

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Publication number
CN105256116A
CN105256116A CN201510707986.0A CN201510707986A CN105256116A CN 105256116 A CN105256116 A CN 105256116A CN 201510707986 A CN201510707986 A CN 201510707986A CN 105256116 A CN105256116 A CN 105256116A
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CN
China
Prior art keywords
10crni3mov
10crni3mov steel
ball shape
socket
steel ball
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Pending
Application number
CN201510707986.0A
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Chinese (zh)
Inventor
王波
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Wuchang Shipbuilding Industry Group Co Ltd
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Wuchang Shipbuilding Industry Group Co Ltd
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Application filed by Wuchang Shipbuilding Industry Group Co Ltd filed Critical Wuchang Shipbuilding Industry Group Co Ltd
Priority to CN201510707986.0A priority Critical patent/CN105256116A/en
Publication of CN105256116A publication Critical patent/CN105256116A/en
Pending legal-status Critical Current

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Abstract

The invention provides a hot press molding method for a spherical head made of 10CrNi3MoV steel and belongs to the field of machining and manufacturing methods of end sockets of sealing pressure structures of ship bathyscaphs. The problems that an existing spherical head cold machining and forming process is high in cost and machining stress is difficult to eliminate are solved, so that cost is reduced, and the service life of the spherical head made of the 10CrNi3MoV steel is prolonged. The method includes the round plate heating step, the die forming step, the quenching treatment step and the tempering treatment step. By the adoption of the method, the requirements for pressing die and stamping equipment are lowered, stamping forming is easy to control, quality is better, machining stress does not exist, it can be guaranteed that the mechanical performance of the spherical head made of the 10CrNi3MoV steel is identical to that of the 10CrNi3MoV steel plate, and therefore it is guaranteed that the service life of the spherical head made of the 10CrNi3MoV steel is identical to that of a ship.

Description

10CrNi3MoV steel ball shape end socket hot-press molding method
Technical field
The invention belongs to boats and ships class bathyscaph sealing load structure end socket machining manufacture, particularly relate to 10CrNi3MoV steel ball shape end socket hot-press molding method.
Background technology
Boats and ships class bathyscaph sealing load structure adopts dome head sealing, and 10CrNi3MoV steel is a kind of low-alloy high-strength steel, and be ship structure steel, its yield strength is more than or equal to 590MPa, and difficulty of processing is larger.Existing 10CrNi3MoV steel ball shape end socket generally adopts cold pressing (mold pressing) shaping, the requirement of this type of moulding process to pressing mold and cold pressing device is very high, dome head manufacture for single piece production brings very high cost, machining stress is more difficult elimination also, reduces the work-ing life of dome head.
Summary of the invention
The invention provides a kind of 10CrNi3MoV steel ball shape end socket hot-press molding method, solve that cost in existing dome head cold machining molding process is high, the problem of the difficult elimination of machining stress, to reduce costs, to improve 10CrNi3MoV steel ball shape end socket work-ing life.
A kind of 10CrNi3MoV steel ball shape end socket hot-press molding method provided by the present invention, comprises the following steps:
(1) plectane heating steps: 10CrNi3MoV steel plectane is dropped into process furnace, and during shove charge, furnace temperature is lower than 800 DEG C, heats up with the speed lower than 150 DEG C/h after shove charge, when temperature arrives 940 DEG C ± 20 DEG C, is incubated 30 ~ 45 minutes; 10CrNi3MoV steel plectane homogeneous heating should be ensured during heating, avoid material burning or soaking time inadequate.
(2) die forming step: the 10CrNi3MoV steel plectane after heating is sent on stamping machine platform, stamping machine mold is aimed at 10CrNi3MoV steel plectane center and is carried out punching press, punching press starting temperature is 860 DEG C ~ 940 DEG C, final pressure temperature is not less than 750 DEG C, forms 10CrNi3MoV steel ball shape end socket; Then in the temperature bottom knockout being not less than 700 DEG C, the 10CrNi3MoV steel ball shape end socket after the demoulding is chilled to 500 DEG C and hang worktable, Homogeneous cooling in no-wind environment below;
(3) quench treatment step: cooled 10CrNi3MoV steel ball shape end socket is dropped into process furnace heating quenching, during shove charge, furnace temperature is lower than 800 DEG C, heat up with the speed lower than 150 DEG C/h after shove charge, when temperature arrives 910 ± 10 DEG C, soaking time 2 hours ± 15 minutes, then hung by 10CrNi3MoV steel ball shape end socket on spray worktable and spray, spray time is not less than 7 minutes, to guarantee a through hardening;
(4) temper step: the 10CrNi3MoV steel ball shape end socket after quenching is dropped into again process furnace heating tempering, during shove charge, furnace temperature is lower than 400 DEG C, heat up with the speed lower than 120 DEG C/h after shove charge, when temperature arrives 665 ± 10 DEG C, soaking time 3 hours ± 15 minutes, then come out of the stove, Homogeneous cooling in no-wind environment.
Described 10CrNi3MoV steel ball shape end socket hot-press molding method, is characterized in that:
In described plectane heating steps, after the radius R of described 10CrNi3MoV steel plectane and die forming, the pass of 10CrNi3MoV steel ball shape seal head end port radius r is the thickness δ of R=(1.2 ~ 1.5) r, 10CrNi3MoV steel plectane 1with 10CrNi3MoV steel ball shape end socket wall thickness δ 2pass be δ 12+ (4mm ~ 6mm).
The present invention adopts hot pressing (mold pressing) moulding process to 10CrNi3MoV steel ball shape end socket, reduce the requirement to pressing mold and pressing equipment, impact briquetting easily controls, better quality, without machining stress, in plectane heating steps, raw sheet is heated to 910 ± 10 DEG C, soaking time 2 hours ± 15 minutes, the mechanical property of 10CrNi3MoV steel plate can be reduced, so that punching press, in die forming step, punching press starting temperature is 860 DEG C ~ 940 DEG C, final pressure temperature is not less than 750 DEG C, can guarantee that too large change does not occur in the metallographic structure of 10CrNi3MoV steel, so that the Tempering and Quenching of 10CrNi3MoV steel below, then by quench treatment step, temper step, regulate the metallographic structure of 10CrNi3MoV steel, can guarantee that the mechanical property of 10CrNi3MoV steel ball shape end socket is consistent with the mechanical property of 10CrNi3MoV steel plate, thus ensure that the work-ing life of 10CrNi3MoV steel ball shape end socket is consistent with the boats and ships class bathyscaph life-span.
Accompanying drawing explanation
Fig. 1 is 10CrNi3MoV steel plectane schematic diagram;
Fig. 2 is 10CrNi3MoV steel ball shape end socket schematic diagram.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1, comprises the following steps:
(1) plectane heating steps: the 10CrNi3MoV steel plectane shown in Fig. 1 is dropped into process furnace, and during shove charge, furnace temperature is 750 DEG C, heats up with the speed of 140 DEG C/h after shove charge, when temperature arrives 940 DEG C ± 20 DEG C, is incubated 30 minutes; 10CrNi3MoV steel plectane homogeneous heating should be ensured during heating, avoid material burning or soaking time inadequate; The radius R of described 10CrNi3MoV steel plectane is 2200mm, thickness δ 1for 32mm;
(2) die forming step: the 10CrNi3MoV steel plectane after heating is sent on stamping machine platform, stamping machine mold is aimed at 10CrNi3MoV steel plectane center and is carried out punching press, punching press starting temperature is 860 DEG C, final pressure temperature is 750 DEG C, forms 10CrNi3MoV steel ball shape end socket as shown in Figure 2; Then the temperature bottom knockout of 720 DEG C, the 10CrNi3MoV steel ball shape end socket after the demoulding is chilled to 480 DEG C and hangs worktable, Homogeneous cooling in no-wind environment; Carry out temperature control with infrared thermometer, and keep a record; Described 10CrNi3MoV steel ball shape seal head end port radius r is 1755mm, wall thickness δ 2for 28mm, moldeed depth is 1176mm;
(3) quench treatment step: cooled 10CrNi3MoV steel ball shape end socket is dropped into process furnace heating quenching, when entering stove, port is downward, keep flat, during shove charge, furnace temperature is 750 DEG C, heats up after shove charge with the speed of 130 DEG C/h, when temperature arrives 910 ± 10 DEG C, soaking time 2 hours ± 15 minutes, then hung by 10CrNi3MoV steel ball shape end socket on spray worktable and spray, spray time 10 minutes, to guarantee a through hardening;
(4) temper step: the 10CrNi3MoV steel ball shape end socket after quenching is dropped into again process furnace heating tempering, when entering stove, port is downward, keep flat, during shove charge, furnace temperature is 380 DEG C, heat up with the speed of 100 DEG C/h after shove charge, when temperature arrives 665 ± 10 DEG C, soaking time 3 hours ± 15 minutes, then come out of the stove, Homogeneous cooling in no-wind environment.
Embodiment 2, comprises the following steps:
(1) plectane heating steps: 10CrNi3MoV steel plectane is dropped into process furnace, and during shove charge, furnace temperature is 780 DEG C, heats up with the speed of 135 DEG C/h after shove charge, when temperature arrives 940 DEG C ± 20 DEG C, is incubated 45 minutes; 10CrNi3MoV steel plectane homogeneous heating should be ensured during heating, avoid material burning or soaking time inadequate; The radius R of described 10CrNi3MoV steel plectane is 1800mm, thickness δ 1for 34mm;
(2) die forming step: the 10CrNi3MoV steel plectane after heating is sent on stamping machine platform, stamping machine mold is aimed at 10CrNi3MoV steel plectane center and is carried out punching press, punching press starting temperature is 940 DEG C, and final pressure temperature is 800 DEG C, forms 10CrNi3MoV steel ball shape end socket; Then the temperature bottom knockout of 750 DEG C, the 10CrNi3MoV steel ball shape end socket after the demoulding is chilled to 500 DEG C and hangs worktable, Homogeneous cooling in no-wind environment; Carry out temperature control with infrared thermometer, and keep a record; Described 10CrNi3MoV steel ball shape seal head end port radius r is 1500mm, wall thickness δ 2for 28mm, moldeed depth is 1076mm;
(3) quench treatment step: cooled 10CrNi3MoV steel ball shape end socket is dropped into process furnace heating quenching, when entering stove, port is downward, keep flat, during shove charge, furnace temperature is 780 DEG C, heats up after shove charge with the speed of 140 DEG C/h, when temperature arrives 910 ± 10 DEG C, soaking time 2 hours ± 15 minutes, then hung by 10CrNi3MoV steel ball shape end socket on spray worktable and spray, spray time 8 minutes, to guarantee a through hardening;
(4) temper step: the 10CrNi3MoV steel ball shape end socket after quenching is dropped into again process furnace heating tempering, when entering stove, port is downward, keep flat, during shove charge, furnace temperature is 390 DEG C, heat up with the speed of 110 DEG C/h after shove charge, when temperature arrives 665 ± 10 DEG C, soaking time 3 hours ± 15 minutes, then come out of the stove, Homogeneous cooling in no-wind environment.
Above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (2)

1. a 10CrNi3MoV steel ball shape end socket hot-press molding method, is characterized in that, comprise the following steps:
(1) plectane heating steps: 10CrNi3MoV steel plectane is dropped into process furnace, and during shove charge, furnace temperature is lower than 800 DEG C, heats up with the speed lower than 150 DEG C/h after shove charge, when temperature arrives 940 DEG C ± 20 DEG C, is incubated 30 ~ 45 minutes;
(2) die forming step: the 10CrNi3MoV steel plectane after heating is sent on stamping machine platform, stamping machine mold is aimed at 10CrNi3MoV steel plectane center and is carried out punching press, punching press starting temperature is 860 DEG C ~ 940 DEG C, final pressure temperature is not less than 750 DEG C, forms 10CrNi3MoV steel ball shape end socket; Then in the temperature bottom knockout being not less than 700 DEG C, the 10CrNi3MoV steel ball shape end socket after the demoulding is chilled to 500 DEG C and hang worktable, Homogeneous cooling in no-wind environment below;
(3) quench treatment step: cooled 10CrNi3MoV steel ball shape end socket is dropped into process furnace heating quenching, during shove charge, furnace temperature is lower than 800 DEG C, heat up with the speed lower than 150 DEG C/h after shove charge, when temperature arrives 910 ± 10 DEG C, soaking time 2 hours ± 15 minutes, then hung by 10CrNi3MoV steel ball shape end socket on spray worktable and spray, spray time is not less than 7 minutes, to guarantee a through hardening;
(4) temper step: the 10CrNi3MoV steel ball shape end socket after quenching is dropped into again process furnace heating tempering, during shove charge, furnace temperature is lower than 400 DEG C, heat up with the speed lower than 120 DEG C/h after shove charge, when temperature arrives 665 ± 10 DEG C, soaking time 3 hours ± 15 minutes, then come out of the stove, Homogeneous cooling in no-wind environment.
2. 10CrNi3MoV steel ball shape end socket hot-press molding method as claimed in claim 1, is characterized in that:
In described plectane heating steps, after the radius R of described 10CrNi3MoV steel plectane and die forming, the pass of 10CrNi3MoV steel ball shape seal head end port radius r is the thickness δ of R=(1.2 ~ 1.5) r, 10CrNi3MoV steel plectane 1with 10CrNi3MoV steel ball shape end socket wall thickness δ 2pass be δ 12+ (4mm ~ 6mm).
CN201510707986.0A 2015-10-27 2015-10-27 Hot press molding method for spherical head made of 10CrNi3MoV steel Pending CN105256116A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105734242A (en) * 2016-04-29 2016-07-06 山西阳煤化工机械(集团)有限公司 Large-diameter thick-wall chromium-molybdenum steel thermal-formed end seal thermal treatment process
CN109694944A (en) * 2017-10-23 2019-04-30 宜兴市联丰化工机械有限公司 A kind of seal head heat treatment technology

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805821A (en) * 2010-04-17 2010-08-18 上海交通大学 Integrated stamping forming treatment method of steel
CN102248362A (en) * 2011-04-30 2011-11-23 泰安广大化工机械有限公司 Method for manufacturing end socket of voltage stabilizer for nuclear power
CN102417958A (en) * 2011-12-13 2012-04-18 上海电气电站设备有限公司 Hot forming process for austenite nitrogen-controlled stainless steel thick-wall head
CN104109798A (en) * 2014-08-01 2014-10-22 宁国市南方耐磨材料有限公司 High-Cr abrasion-resistant cast iron steel ball
CN104651573A (en) * 2014-05-23 2015-05-27 上海汇众汽车制造有限公司 High-strength part forming process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805821A (en) * 2010-04-17 2010-08-18 上海交通大学 Integrated stamping forming treatment method of steel
CN102248362A (en) * 2011-04-30 2011-11-23 泰安广大化工机械有限公司 Method for manufacturing end socket of voltage stabilizer for nuclear power
CN102417958A (en) * 2011-12-13 2012-04-18 上海电气电站设备有限公司 Hot forming process for austenite nitrogen-controlled stainless steel thick-wall head
CN104651573A (en) * 2014-05-23 2015-05-27 上海汇众汽车制造有限公司 High-strength part forming process
CN104109798A (en) * 2014-08-01 2014-10-22 宁国市南方耐磨材料有限公司 High-Cr abrasion-resistant cast iron steel ball

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105734242A (en) * 2016-04-29 2016-07-06 山西阳煤化工机械(集团)有限公司 Large-diameter thick-wall chromium-molybdenum steel thermal-formed end seal thermal treatment process
CN109694944A (en) * 2017-10-23 2019-04-30 宜兴市联丰化工机械有限公司 A kind of seal head heat treatment technology

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Application publication date: 20160120