CN105886715A - Heat treatment method of liquefied petroleum gas steel bottle - Google Patents
Heat treatment method of liquefied petroleum gas steel bottle Download PDFInfo
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- CN105886715A CN105886715A CN201510007349.2A CN201510007349A CN105886715A CN 105886715 A CN105886715 A CN 105886715A CN 201510007349 A CN201510007349 A CN 201510007349A CN 105886715 A CN105886715 A CN 105886715A
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- heat treatment
- steel cylinder
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- petroleum gas
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a heat treatment method of a liquefied petroleum gas steel bottle. The steel bottle is prepared from a hot rolled steel plate and is welded. The heat treatment method comprises the steps that A, a heat treatment furnace is heated to the temperature range of 15 to 850<+20> DEG C; B, the liquefied petroleum gas steel bottle is taken out of the heat treatment furnace, and is fed into a cooling chamber through a roll bed to be subjected to spray cooling; and C, after quenching heating, the steel bottle rotates, at the same time, nozzles provide cooling speeds required by the technological design through minicomputer program control in time periods of tau1, tau2, tau3 and tau4, and the quenching technology of the steel bottle is completed, wherein in the tau1 time period, the temperature is 700 to 850 DEG C, and the cooling time is 6 s. According to the heat treatment method, through controlling the heat treatment technological systems such as the heating temperature, the temperature keeping time and the cooling manner, the liquefied petroleum gas steel bottle subjected to heat treatment has excellent comprehensive mechanical property.
Description
Technical field
The present invention relates to the heat treatment method of a kind of steel heavy plate for pressure vessels, the heat of a kind of steel cylinder steel
Process technique.
Background technology
The repeatable portable steel gas cylinder filled for containing compressed gas or high pressure liquefied gas is called for short
For steel cylinder, and liquefied petroleum gas steel cylinder is a kind of for containing the liquefied petroleum gas as one of oil product
Steel cylinder.Along with expanding economy and the raising of people's living standard, the use of liquefied petroleum gas steel cylinder is increasingly
Generally, the use especially as family or public restaurants fuel applications is the most extensive.But liquefied petroleum gas steel
Bottle is the equipment that a kind of danger is the biggest, and its stored liquefied petroleum gas is that a kind of pressure is the highest and easy
Fire explosive compressed gas.Therefore, the safety of liquefied petroleum gas steel cylinder is very important, it is ensured that steel cylinder
Workmanship be to ensure that steel cylinder safety important prerequisite.
After liquefied petroleum gas steel cylinder is made up of hot rolled steel plate, need steel plate to be welded, in weld zone
Territory and there is the highest welding stress about.And this welding stress is as eliminated not in time, in the process of use
In, the pressure of gas and the addition of welding stress in bottle, it will exceed the antiknock pressure of steel cylinder and make at steel cylinder
Under a kind of unsafe condition that may explode at any time.Accordingly, it would be desirable to the liquefied petroleum gas steel cylinder made is carried out
Bulk heat treatmet, to eliminate produced welding stress and other residual stress during making steel cylinder.
But the material structure that all can affect steel cylinder too high or too low for temperature of heat treatment, and then affect its mechanical property.
If the Technology for Heating Processing taked is improper, it will make the mechanical property deep fades of steel cylinder, thus cause steel cylinder
Mechanical property deterioration.
Summary of the invention
The design due to Technology for Heating Processing temperature that it is an object of the invention to overcome prior art to exist does not conforms to
Reason, makes welding stress eliminate thoroughly or make the serious shortcoming of mechanical property decay, and provides a kind of liquefaction stone
The heat treatment method of oil gas steel cylinder, the heat treatment method of this liquefied petroleum gas steel cylinder, while high-temperature heating, is adopted
By the suitable type of cooling, reduce the decay of its mechanical property, both ensure that its mechanical property did not reduced, and protected again
Demonstrate,prove the elimination of welding stress, liquefied petroleum gas steel cylinder can be made to use in the secure state.
It is an object of the invention to be achieved through the following technical solutions:
The heat treatment method of liquefied petroleum gas steel cylinder, described steel cylinder hot rolled steel plate prepares and welds,
It is characterized in that: described heat treatment method comprises the following steps:
Heat-treatment furnace is heated to 850 by A+20-15 DEG C of temperature ranges；
Liquefied petroleum gas steel cylinder is taken out from heat-treatment furnace by B, roller-way send into cooling chamber, carries out spray cooling；
After the heating of C quenching of steel, steel cylinder self rotates, and the most each nozzle is respectively at τ1、τ2、τ3
And τ4By micro-computer controlled offer by the rate of cooling needed for technological design in each period, thus complete a steel
The quenching process of bottle, wherein τ1: 850～700 DEG C, cool time 6s, 25 DEG C/s of cooling rate；τ2: 700～
400 DEG C, cool time 6s, 50 DEG C/s of cooling rate；τ3: 400～300 DEG C, cool time 6s, cooling rate 16.7 DEG C
/s；τ4: 300～100 DEG C, cool time 62s, 3.2 DEG C/s of cooling rate；
The material composition preparing the hot rolled steel plate used by steel cylinder is calculated as with weight %: C:0.37～
0.44, Si:0.20～0.40, Mn:1.40～1.80, P≤0.035, S≤0.035, Cu≤0.20,
Als ＞ 0.015%, surplus is Fe.
The present invention passes through fog quenching quenched steel cylinder performance, the metallographic structure of fog quenching quenched 40Mn2 steel cylinder
3 and table 4 it are shown in Table respectively for sorbite, its mechanical property and explosion bulge test result.Test shows: 40Mn2 steel
The bottle quenched performance of fog quenching is better than 40Mn2 and 34Mn2V steel normalizing steel cylinder.At its heat of 40Mn2 normalizing steel cylinder
Guarantee value σ s is in 470～490MPa scopes for reason, then can bring up to 700MPa after fog quenching is quenched；
Owing to most cylinders designs based on yield strength, steel cylinder wall thickness can be made to subtract so σ s improves
Thin, weight saving, saving steel and again can reach outlet steel cylinder weight demands；And improve conevying efficiency or
Make certain size and the steel cylinder of weight, can allow to fill more gas.Particularly its Low temperature impact toughness value (V
Type ,-50 DEG C) more than 49J/cm2, therefore can use at cold district.
Accompanying drawing explanation
Fig. 1 is 40Mn2 steel austenite of the present invention continuous transition curve (CCT) figure；
Fig. 2 is the optimal cooling chart of 40Mn2 steel cylinder in the present invention；
Fig. 3 is the quenched rear mechanical performance data table of 40Mn2 steel cylinder fog quenching；
Fig. 4 is 40Mn2 steel cylinder (fog quenching is quenched) the Burst Test Data table using fog quenching；
Detailed description of the invention
Below by specific embodiment, technical scheme is described in further detail；
Embodiment: see accompanying drawing 1,2,3,4, uses 40Mn2 hot rolled steel plate make steel cylinder and weld,
Heat-treatment furnace is heated to 850 DEG C of temperature, liquefied petroleum gas steel cylinder is sent in heat-treatment furnace, make liquefaction stone
The temperature of oil gas steel cylinder progressivelyes reach 850 DEG C, is incubated 6 minutes, finally, by liquefied petroleum gas steel cylinder in stove
Take out from heat-treatment furnace, roller-way send into cooling chamber, carry out spray cooling and eliminate whole stress；C steel cylinder is quenched
After fire heating, steel cylinder self rotates, and the most each nozzle is respectively at τ1、τ2、τ3And τ4Each period
In by micro-computer controlled offer by the rate of cooling needed for technological design, thus complete the quenching process of a steel cylinder,
Wherein τ1: 850～700 DEG C, cool time 6s, 25 DEG C/s of cooling rate；τ2: 700～400 DEG C, during cooling
Between 6s, 50 DEG C/s of cooling rate；τ3: 400～300 DEG C, cool time 6s, 16.7 DEG C/s of cooling rate；τ4:
300～100 DEG C, cool time 62s, 3.2 DEG C/s of cooling rate；Prepare the material of hot rolled steel plate used by steel cylinder
Composition is calculated as with weight %: C:0.37～0.44, Si:0.20～0.40, Mn:1.40～1.80, P≤0.035, S
≤ 0.035, Cu≤0.20, Als ＞ 0.015%, surplus is Fe.
Mechanical property after the liquefied petroleum gas steel cylinder heat treatment of the present invention compared with prior art, mechanical property
Attenuation amplitude substantially reduces, and elongation percentage and the contraction percentage of area all improve, therefore through heat treatment of the present invention it
After liquefied petroleum gas steel cylinder compared with prior art its combination property be all improved.
After heat treatment, the microscopic structure of steel cylinder and the microscopic structure of grain size and hot rolled steel plate do not occur substantially
Change, it is ensured that the serviceability of steel cylinder material.The present invention is by controlling heating-up temperature, temperature retention time, cold
But the system of heat treatment process such as mode, makes steel cylinder be provided with more excellent comprehensive mechanical performance.The most complete
Meet country's property indices about steel heavy plate for pressure vessels.
The present invention, while ensure that the welding stress eliminating steel cylinder, also ensure that steel cylinder property indices
Be up to state standards the requirement to pressure vessel, and then ensure that the serviceability of steel cylinder.The present invention is for liquid
Heat treatment temperature and processing method selected by liquefied oil gas steel cylinder are creative, have both reached steel cylinder
Eliminate the effect of stress, in turn simplify production process, thus saved heat treatment time, improve production effect
Rate.
Claims (2)
1. a heat treatment method for liquefied petroleum gas steel cylinder, described steel cylinder hot rolled steel plate is prepared and welds, it is characterised in that: described heat treatment method comprises the following steps:
Heat-treatment furnace is heated to 850 by A+20-15 DEG C of temperature ranges；
Liquefied petroleum gas steel cylinder is taken out from heat-treatment furnace by B, roller-way send into cooling chamber, carries out spray cooling；
After the heating of C quenching of steel, steel cylinder self rotates, and the most each nozzle is respectively at τ1、τ2、τ3And τ4By micro-computer controlled offer by the rate of cooling needed for technological design in each period, thus complete the quenching process of a steel cylinder, wherein τ1: 850～700 DEG C, cool time 6s, 25 DEG C/s of cooling rate；τ2: 700～400 DEG C, cool time 6s, 50 DEG C/s of cooling rate；τ3: 400～300 DEG C, cool time 6s, 16.7 DEG C/s of cooling rate；τ4: 300～100 DEG C, cool time 62s, 3.2 DEG C/s of cooling rate.
The heat treatment method of liquefied petroleum gas steel cylinder the most according to claim 1, it is characterized in that: the material composition preparing the hot rolled steel plate used by steel cylinder is calculated as with weight %: C:0.37～0.44, Si:0.20～0.40, Mn:1.40～1.80, P≤0.035, S≤0.035, Cu≤0.20, Als ＞ 0.015%, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007349.2A CN105886715A (en) | 2015-01-08 | 2015-01-08 | Heat treatment method of liquefied petroleum gas steel bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007349.2A CN105886715A (en) | 2015-01-08 | 2015-01-08 | Heat treatment method of liquefied petroleum gas steel bottle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105886715A true CN105886715A (en) | 2016-08-24 |
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ID=56999257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510007349.2A Pending CN105886715A (en) | 2015-01-08 | 2015-01-08 | Heat treatment method of liquefied petroleum gas steel bottle |
Country Status (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476027A (en) * | 2009-02-05 | 2009-07-08 | 攀钢集团研究院有限公司 | Heat treatment method for steel cylinder for liquefied petroleum gas |
| CN102330030A (en) * | 2011-10-14 | 2012-01-25 | 天津钢管集团股份有限公司 | Seamless steel pipe with diameter of between 559 and 711mm for vehicular high-pressure gas cylinder and production method thereof |
| CN104046762A (en) * | 2014-06-26 | 2014-09-17 | 燕山大学 | Quenching method of major-diameter thick-wall pressure gas cylinder |
-
2015
- 2015-01-08 CN CN201510007349.2A patent/CN105886715A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476027A (en) * | 2009-02-05 | 2009-07-08 | 攀钢集团研究院有限公司 | Heat treatment method for steel cylinder for liquefied petroleum gas |
| CN102330030A (en) * | 2011-10-14 | 2012-01-25 | 天津钢管集团股份有限公司 | Seamless steel pipe with diameter of between 559 and 711mm for vehicular high-pressure gas cylinder and production method thereof |
| CN104046762A (en) * | 2014-06-26 | 2014-09-17 | 燕山大学 | Quenching method of major-diameter thick-wall pressure gas cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 王贤敏: "钢瓶的热处理", 《金属热处理》 * |
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| DD01 | Delivery of document by public notice |
Addressee: Biaoxin Science and Technology (Beijing) Co., Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |
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| RJ01 | Rejection of invention patent application after publication |