CN106180245A - A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks - Google Patents
A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks Download PDFInfo
- Publication number
- CN106180245A CN106180245A CN201610562202.4A CN201610562202A CN106180245A CN 106180245 A CN106180245 A CN 106180245A CN 201610562202 A CN201610562202 A CN 201610562202A CN 106180245 A CN106180245 A CN 106180245A
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- China
- Prior art keywords
- blank
- slow cooling
- stove
- cooling method
- heavy wall
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
Abstract
The present invention relates to a kind of slow cooling method of blank, particularly relate to a kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks.Slow cooling method of the present invention is as follows: (1) base；(2) slow cooling work step: include blank enter stove, treat material, insulation, stove is cold, come out of the stove.The present invention prepares blank by three-phase planted agent under 150MN blank machine, now blank internal stress is big, white point easily occur, case hardness is high, it is difficult to processing, by slow cooling work step, eliminate blank internal stress, reduce case hardness, optimize blank interior tissue, reach to expand hydrogen effect, it is to avoid stress cracking and white point tissue lack the generation limited.
Description
Technical field:
The present invention relates to a kind of slow cooling method of blank, particularly relate to a kind of containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks
Slow cooling method.
Background technology:
From in July, 2009 extruding once success, domestic first set 3.6 ten thousand tons of vertical extruder, 1.5 ten thousand tons of vertical blank machines are in Inner Mongol
Ancient north heavy industry group builds up, and indicates that the high-end molding fabrication techniques of China obtains important breakthrough, has broken external large-scale
Workpiece base, the technical monopoly of field of extrusion.Steel ingot, as the raw material of extruding, passes through jumping-up on 150MN base press, wears
Hole operation, provides extrusion billet for 360MN extruder, in practice it has proved that: the quality of perforation blank directly determines the surface of extruded tube
Quality.The mode of early stage extrusion process commonly used " base-extruding " is once-forming for blank steel pipe, and after shaping, pipe exists wall
The phenomenon that thick difference is big, surface quality defect is serious.In order to improve extrusion tube blank surface quality, extrusion process have employed " base-machine
Processing-extruding " mode.
Summary of the invention:
It is an object of the invention to provide a kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks, the method solution
By the hot slow cooling of high temperature to room temperature, blank of having determined produces that case hardness is high, stress cracking and white point tissue defects, it is to avoid blank by
The problem causing blank surface really up to the mark when high temperature cooling is to room temperature or to scrap.
The present invention is realized by techniques below solution:
A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks, slow cooling method is as follows: (1) base；(2) slow cooling
Work step: include blank enter stove, treat material, insulation, stove is cold, come out of the stove.
Further: more than blank air cooling to 500 DEG C to enter stove, treat material temperature degree 350～400 DEG C, be incubated 2.5-5 hour, stove
Heat up under total power, blank wall thickness 200mm～500mm, holding temperature 640～660 DEG C, it is incubated 30-50 hour, speed of furnace cooling≤
40 DEG C/h, tapping temperature≤400 DEG C.
The present invention prepares blank by three-phase planted agent under 150MN blank machine, and now blank internal stress is big, easily occurs white
Point, case hardness is high, it is difficult to processing, by slow cooling work step, eliminates blank internal stress, reduces case hardness, optimizes inside blank
Tissue, reaches to expand hydrogen effect, it is to avoid stress cracking and white point tissue lack the generation limited.
Accompanying drawing explanation
Fig. 1 is that the present invention contains Ni, Cu alloy WB36 blank retarded cooling process figure.
Detailed description of the invention
Blank air cooling of the present invention enters stove to more than 500 DEG C, treats material temperature degree 350～400 DEG C, is incubated 2.5-5 hour, and stove is complete
Heating up under power, holding temperature 640～660 DEG C, blank wall thickness and all temperature retention times are shown in Table 1, speed of furnace cooling≤40 DEG C/h, come out of the stove
Temperature≤400 DEG C.
Embodiment 1
The method has passed through test respectively.
Small lot trial-production produces Ni, Cu alloy material, chooses three stoves and carries out verification experimental verification, is specifically shown in Table 2:
After blank is come out of the stove, carry out white point detection, produce without white point.Blank surface hardness determination has been carried out before blank is processed,
WB36 hardness is 160～170HB.On the other hand carried out the blank course of processing following the tracks of observing, found in the blank course of processing
Middle metal cutting is normal, and flawless produces.For examining checking further, respectively high and low alloy material pipe is carried out physics and chemistry
Detection, detection project includes macrostructure, metallographic test and mechanical property test, agreement with experimental technical requirement, is specifically shown in
Table 3,4:
From the point of view of this small lot trial-production situation: after carrying out blank slow cooling by this technique, blank hardness is moderate, and applicable machinery adds
Work；Blank and the equal flawless of pipe, white point phenomenon；Follow-up pipe performance is qualified.When demonstrating slow cooling temperature and insulation further
Between the reasonability of calculating principle.
Facts have proved that the method disclosure satisfy that technology requirement, it is ensured that product quality.
Claims (2)
1. the slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks, it is characterised in that slow cooling method is as follows: (1)
Base；
(2) slow cooling work step: include blank enter stove, treat material, insulation, stove is cold, come out of the stove.
A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks the most according to claim 1, its feature exists
In, more than blank air cooling to 500 DEG C enter stove, treat material temperature degree 350～400 DEG C, be incubated 2.5-5 hour, heat up under stove total power,
Blank wall thickness 200mm～500mm, holding temperature 640～660 DEG C, it is incubated 30-50 hour, speed of furnace cooling≤40 DEG C/h, go out furnace temperature
Spend≤400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562202.4A CN106180245A (en) | 2016-07-18 | 2016-07-18 | A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562202.4A CN106180245A (en) | 2016-07-18 | 2016-07-18 | A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106180245A true CN106180245A (en) | 2016-12-07 |
Family
ID=57475591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610562202.4A Pending CN106180245A (en) | 2016-07-18 | 2016-07-18 | A kind of slow cooling method containing Ni, Cu alloy large-size extruding heavy wall steps of manufacturing blanks |
Country Status (1)
| Country | Link |
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| CN (1) | CN106180245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614289A (en) * | 2019-09-30 | 2019-12-27 | 内蒙古北方重工业集团有限公司 | Slow cooling method for large-scale extruded thick-wall blank made of Ni-Cu alloy heat-resistant steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928128A (en) * | 2005-09-08 | 2007-03-14 | 内蒙古北方重工业集团有限公司 | Ingot slow cool annealing process for low-carbon steel |
| CN103343200A (en) * | 2013-07-01 | 2013-10-09 | 江阴市恒业锻造有限公司 | Short-process thermal treatment method of large 35CrNi3MoV steel forgings |
| CN105755224A (en) * | 2016-04-10 | 2016-07-13 | 邯郸新兴特种管材有限公司 | Quick spheroidal annealing thermal treatment process for Cr12 extruded seamless steel tube |
-
2016
- 2016-07-18 CN CN201610562202.4A patent/CN106180245A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928128A (en) * | 2005-09-08 | 2007-03-14 | 内蒙古北方重工业集团有限公司 | Ingot slow cool annealing process for low-carbon steel |
| CN103343200A (en) * | 2013-07-01 | 2013-10-09 | 江阴市恒业锻造有限公司 | Short-process thermal treatment method of large 35CrNi3MoV steel forgings |
| CN105755224A (en) * | 2016-04-10 | 2016-07-13 | 邯郸新兴特种管材有限公司 | Quick spheroidal annealing thermal treatment process for Cr12 extruded seamless steel tube |
Non-Patent Citations (3)
| Title |
|---|
| 崔忠圻: "《热加工技术简明手册热处理分册》", 31 October 1997, 哈尔滨工业大学出版社 * |
| 蒋玉琴: "《电厂金属实用技术问答》", 31 January 2000, 中国水利水电出版社 * |
| 赵勇桃: "《超临界锅炉用P92钢的组织性能及应用》", 31 March 2015, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614289A (en) * | 2019-09-30 | 2019-12-27 | 内蒙古北方重工业集团有限公司 | Slow cooling method for large-scale extruded thick-wall blank made of Ni-Cu alloy heat-resistant steel |
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| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |
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| WD01 | Invention patent application deemed withdrawn after publication |