CN109609736A - A kind of E35CrMnSiA material penetration shells heat-treatment technology method - Google Patents
A kind of E35CrMnSiA material penetration shells heat-treatment technology method Download PDFInfo
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- CN109609736A CN109609736A CN201811625469.9A CN201811625469A CN109609736A CN 109609736 A CN109609736 A CN 109609736A CN 201811625469 A CN201811625469 A CN 201811625469A CN 109609736 A CN109609736 A CN 109609736A
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- heating
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- tempering
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- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/16—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for explosive shells
Abstract
The invention discloses a kind of E35CrMnSiA material penetration shells heat-treatment technology methods, its method and step is as follows: (1) normalized treatment: workpiece is using induction through heating, power frequency 1000Hz, 20~40 revs/min of workpiece rotation speed, 910 DEG C~930 DEG C of heating temperature, it is total 4~6 minutes heating times (equal temperature time containing workpiece), air-cooled after heating；(2) be quenched: workpiece is using induction through heating, power frequency 1000Hz, 20~40 revs/min of workpiece rotation speed, 890 DEG C~910 DEG C of heating temperature, total 4~6 minutes heating times (equal temperature time containing workpiece), workpiece immerses isothermal cooling treatment in 235 DEG C~250 DEG C melting salt made from earth containing a comparatively high percentage of sodium chloride, 35~45 minutes cooling times of isothermal after Quench heating.The present invention can effectively simplify technique, shorten the production cycle, reach the effect of cost efficiency, and can maximumlly improve product mechanical property qualification rate.
Description
Technical field
The invention belongs to material heat treatment technical fields, and in particular at a kind of E35CrMnSiA material penetration shells heat
Science and engineering process.
Background technique
Penetration class guided missile bullet is mainly used for hitting building, airfield runway, armored concrete underground unexplored ordnance, effect
Very high impact acceleration, therefore the mechanical property that bullet shell body material will have high intensity, high tenacity etc. excellent are born in the process
Can, E35CrMnSiA steel with excellent comprehensive performance and good economy penetration shells field can partly substitute G50,
The unimach such as F175 and DT300, E35CrMnSiA are low-alloy super-strength steel, compared with conventional 35CrMnSiA, alloy
Element silicone content (%) is improved by 1.10~1.40 to 1.30~1.60, increases by 0.20%~0.50% nickel, sulphur, phosphorus content be not by
It is down to 0.02% greater than 0.025%, not only has higher tensile strength after heat treatment, while also there is better impact flexibility.
The material heat treatment process that E35CrMnSiA steel manufacturer provides are as follows:
Normalized treatment: being heated to 950 DEG C ± 10 DEG C, keeps the temperature 45 minutes, is air-cooled to room temperature；
Tempering: being heated to 710 DEG C ± 10 DEG C, keeps the temperature 2 hours, is air-cooled to room temperature；
Quenching treatment: being heated to 890 DEG C ± 10 DEG C, keeps the temperature 45 minutes, oil quenching；
Tempering: being heated to 235 DEG C ± 5 DEG C, keeps the temperature 3 hours, air-cooled.
After heat treatment, the mechanical property requirements of material reach Rm >=1800MPa, Z >=35%, Aku >=64J, actual production
In, it is found after the heat treatment for carrying out 25 batches, 50 products, the mechanical property qualification rate of product only has 58%.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind being capable of biggish raising product heat treatment
The E35CrMnSiA material penetration shells heat-treatment technology method of mechanical property qualification rate.
In order to solve the above technical problems, the present invention adopts the following technical scheme: a kind of E35CrMnSiA material penetration class shell
Body heat processing method, method and step are as follows: (1) normalized treatment: workpiece is using induction through heating, power frequency
1000Hz, 20~40 revs/min of workpiece rotation speed, 910 DEG C~930 DEG C of heating temperature, 4~6 minutes total heating times (contained workpiece
Equal temperature time), it is air-cooled after heating；(2) be quenched: workpiece is using induction through heating, 1000 Hz of power frequency, workpiece rotation
It 20~40 revs/min of rotary speed, 890 DEG C~910 DEG C of heating temperature, 4~6 minutes total heating times (equal temperature time containing workpiece), quenches
Workpiece immerses isothermal cooling treatment in 235 DEG C~250 DEG C melting salt made from earth containing a comparatively high percentage of sodium chloride, 35~45 minutes cooling times of isothermal after fire heating；(3)
Tempering: the workpiece washed after isothermal cooling treatment through overheat washing and cold water is put into tempering heating furnace and carries out tempering,
It heats up, 180 DEG C~200 DEG C of heating temperature, soaking time 2~3 hours, comes out of the stove after tempering heating air-cooled with furnace.
The invention has the advantages that: normalizing+quenching+tempering technique is used in above-mentioned heat-treatment technology method, eliminate
710 DEG C ± 10 DEG C of high tempering link in prior art method, process is relatively easy, quick due to using induction
The method of heating carries out normalizing and Quench heating, shortens quenching and normalizing heating time, reduces energy consumption simultaneously and has refined Austria
Family name's body crystal grain, E35CrMnSiA steel penetration shells heat treatment mechanical property qualification rate have reached 100%.The present invention can be effective
Ground simplifies technique, shortens the production cycle, reaches the effect of cost efficiency, and can maximumlly improve product mechanical property qualification
Rate.
Detailed description of the invention
Fig. 1 is existing E35CrMnSiA material penetration shells heat treatment process conceptual scheme；
Fig. 2 is E35CrMnSiA material penetration shells heat treatment process conceptual scheme of the present invention.
Specific embodiment
The specific embodiment of invention is described in detail with reference to the accompanying drawing.As shown in Figs. 1-2: it is a kind of
E35CrMnSiA material penetration shells heat-treatment technology method, method and step are as follows: (1) normalized treatment: workpiece is using sense
Through heating is answered, power frequency 1000Hz is 20~40 revs/min of workpiece rotation speed, 910 DEG C~930 DEG C of heating temperature, total to heat
It is time 4~6 minutes (equal temperature time containing workpiece), air-cooled after heating；(2) be quenched: workpiece is using induction through heating, electric current
1000 Hz of frequency, 20~40 revs/min of workpiece rotation speed, 890 DEG C~910 DEG C of heating temperature, 4~6 minutes total heating times
(equal temperature time containing workpiece), workpiece immerses isothermal cooling treatment in 235 DEG C~250 DEG C melting salt made from earth containing a comparatively high percentage of sodium chloride after Quench heating, and isothermal is cold
But time 35~45 minutes；(3) tempering: the workpiece washed after isothermal cooling treatment through overheat washing and cold water is put into tempering and adds
Tempering is carried out in hot stove, is heated up with furnace, 180 DEG C~200 DEG C of heating temperature, soaking time 2~3 hours, tempering heating knot
It comes out of the stove after beam air-cooled.
The present invention uses example
Example 1
Normalized treatment: shell using induction through heating, power frequency 1000Hz, shell in inductor 20 turns of rotation speed/
Point, 5 DEG C/s of heating speed is 910 DEG C of heating temperature, heating time 6 minutes, air-cooled；
Quenching treatment: workpiece using induction through heating, 1000 Hz of power frequency, workpiece inductor 20 turns of rotation speed/
Point, 5 DEG C/s of heating speed, 890 DEG C of heating temperature, 6 minutes total heating times, workpiece immerses 235 DEG C of meltings after Quench heating
Isothermal processes in salt made from earth containing a comparatively high percentage of sodium chloride, isothermal time 45 minutes；
Tempering: the workpiece washed after isothermal cooling treatment through overheat washing and cold water is put into tempering heating furnace and carries out at tempering
Reason, 180 DEG C of heating temperature, soaking time 3 hours, workpiece was come out of the stove air-cooled after tempering heating.
Example 2
Normalized treatment: shell using induction through heating, power frequency 1000Hz, shell in inductor 30 turns of rotation speed/
Point, 7 DEG C/s of heating speed is 920 DEG C of heating temperature, 5 minutes total heating times, air-cooled；
Quenching treatment: workpiece uses penetration type induction heating, 1000 Hz of power frequency, rotation speed 30 of the workpiece in inductor
Rev/min, 7 DEG C/s of heating speed, 900 DEG C of heating temperature, 5 minutes total heating times, workpiece immerses 245 DEG C of meltings after Quench heating
Salt made from earth containing a comparatively high percentage of sodium chloride in isothermal processes, isothermal time 40 minutes；
Tempering: the workpiece washed after isothermal through the washing of cooling treatment overheat and cold water is put into tempering heating furnace and carries out at tempering
Reason, 190 DEG C of heating temperature, soaking time 2.5 hours, the workpiece after tempering was come out of the stove air-cooled.
Example 3
Normalized treatment: shell using induction through heating, power frequency 1000Hz, shell in inductor 40 turns of rotation speed/
Point, 10 DEG C/s of heating speed is 930 DEG C of heating temperature, 4 minutes total heating times, air-cooled；
Quenching treatment: workpiece using induction through heating, 1000 Hz of power frequency, workpiece in inductor 40 turns of rotation speed/
Point, 10 DEG C/s of heating speed, 910 DEG C of heating temperature, 4 minutes total heating times, workpiece immerses 250 DEG C of meltings after Quench heating
Isothermal processes in salt made from earth containing a comparatively high percentage of sodium chloride, isothermal time 35 minutes；
Tempering: the workpiece washed after isothermal cooling treatment through overheat washing and cold water is put into tempering heating furnace and carries out at tempering
Reason, 200 DEG C of heating temperature, soaking time 2 hours, workpiece was come out of the stove air-cooled after tempering heating.
It is that existing E35CrMnSiA steel penetration shells heat-treatment technology method is invaded with E35CrMnSiA steel of the present invention below
Thorough shells heat-treatment technology method mechanical property tests tables of data:
。
Claims (1)
1. a kind of E35CrMnSiA material penetration shells heat-treatment technology method, it is characterised in that handle as follows:
(1) normalized treatment: workpiece 20~40 revs/min of workpiece rotation speed, is heated using induction through heating, power frequency 1000Hz
It is 910 DEG C~930 DEG C of temperature, 4~6 minutes total heating times (equal temperature time containing workpiece), air-cooled after heating；(2) it is quenched: work
Part, which uses, incudes through heating, 1000 Hz of power frequency, and 20~40 revs/min of workpiece rotation speed, heating temperature 890 DEG C~910
DEG C, 4~6 minutes total heating times (equal temperature time containing workpiece), workpiece immerses 235 DEG C~250 DEG C melting salt made from earth containing a comparatively high percentage of sodium chloride after Quench heating
Middle isothermal cooling treatment, 35~45 minutes cooling times of isothermal；(3) tempering: after isothermal cooling treatment through overheat washing and
The workpiece that cold water is washed is put into tempering heating furnace and carries out tempering, heats up with furnace, and 180 DEG C~200 DEG C of heating temperature, when heat preservation
Between 2~3 hours, tempering heating after come out of the stove it is air-cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811625469.9A CN109609736A (en) | 2018-12-28 | 2018-12-28 | A kind of E35CrMnSiA material penetration shells heat-treatment technology method |
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| CN201811625469.9A CN109609736A (en) | 2018-12-28 | 2018-12-28 | A kind of E35CrMnSiA material penetration shells heat-treatment technology method |
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| CN109609736A true CN109609736A (en) | 2019-04-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
| CN112226599A (en) * | 2020-09-11 | 2021-01-15 | 河南北方红阳机电有限公司 | Heat treatment process method for DT1900 steel penetration type deep drilling warhead shell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03162515A (en) * | 1989-11-21 | 1991-07-12 | Sumitomo Metal Ind Ltd | Heat treatment method |
| CN101435013A (en) * | 2008-12-26 | 2009-05-20 | 内蒙古北方重工业集团有限公司 | Preparation technique of flat shovel teeth material |
| CN108220540A (en) * | 2017-12-15 | 2018-06-29 | 河南北方红阳机电有限公司 | A kind of G50 materials penetration shells heat-treatment technology method |
-
2018
- 2018-12-28 CN CN201811625469.9A patent/CN109609736A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03162515A (en) * | 1989-11-21 | 1991-07-12 | Sumitomo Metal Ind Ltd | Heat treatment method |
| CN101435013A (en) * | 2008-12-26 | 2009-05-20 | 内蒙古北方重工业集团有限公司 | Preparation technique of flat shovel teeth material |
| CN108220540A (en) * | 2017-12-15 | 2018-06-29 | 河南北方红阳机电有限公司 | A kind of G50 materials penetration shells heat-treatment technology method |
Non-Patent Citations (1)
| Title |
|---|
| 苏静等: "35CrMnSiA钢热处理工艺研究", 《热加工工艺》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
| CN112226599A (en) * | 2020-09-11 | 2021-01-15 | 河南北方红阳机电有限公司 | Heat treatment process method for DT1900 steel penetration type deep drilling warhead shell |
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