CN104862642A - 45-steel precisely punched part thin layer carburizing heat treatment method - Google Patents
45-steel precisely punched part thin layer carburizing heat treatment method Download PDFInfo
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- CN104862642A CN104862642A CN201510321178.0A CN201510321178A CN104862642A CN 104862642 A CN104862642 A CN 104862642A CN 201510321178 A CN201510321178 A CN 201510321178A CN 104862642 A CN104862642 A CN 104862642A
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Abstract
The invention discloses a 45-steel precisely punched part thin layer carburizing heat treatment method which comprises the following steps: lifting a fixture filled with multiple 45-steel precisely punched parts into a pit-type carburizing furnace, and performing thin layer carburizing treatment on the 45-steel precisely punched parts by adopting a kerosene drip method; lifting the fixture which is completely subjected to carburizing treatment and is filled with 45-steel precisely punched parts out of the pit-type carburizing furnace, and immersing the fixture in an oil bath for quenching; taking the fixture out of the oil bath and cooling, detaching the multiple 45-steel precisely punched parts from the fixture, and cleaning the detached 45-steel precisely punched parts in a cleaning machine; and tempering the cleaned 45-steel precisely punched parts, wherein the tempering temperature is 180-220 DEG C. According to the 45-steel precisely punched part thin layer carburizing heat treatment method provided by the invention, the depth of the carburizing layer is 0.2mm or below, and the hardness of each precisely punched part is over HRC47; and compared with the prior art, the method disclosed by the invention has the advantages of low cost, low quenching temperature, small deformation, high flatness and cracking resistance.
Description
Technical field
The present invention relates to heat treating method technical field, particularly relate to a kind of 45 steel essence stamping thin layer carburizing heat treating methods.
Background technology
Along with the development of fine dies technology, smart stamping has been widely used in the industries such as automobile, electrical equipment, military project.And in numerous smart stamping, because domestic 45 steel are medium carbon steel, smart punching performance is good, easily purchase, cost comparatively steel alloy reduces greatly, is therefore widely used.
The common heat treating method of domestic 45 steel is that about 30HRC is arrived in modifier treatment.But the smart stamping such as cam, ratchet of 8mm and above 45 steel matter, heat treatment hardness requires to reach more than 47HRC.Adopt traditional quenching method, no matter being oil quenching, shrend, all there is soft spots in hardness, cannot meet the technical requirements of part.If adopt salt solution or more than 960 DEG C quench hots, then there is distortion large, follow-uply need ground finish, the problems such as part is easy to crack.As the patent No. 201310197521.6 discloses a kind of 45#, 40Cr steel quench hot novel process, in High Temperature Furnaces Heating Apparatus to 45,40Cr steel is 960-980 DEG C of quenching.But it is high that this method exists quenching temperature, distortion is large, and be only suitable for the thermal treatment of mould, and be not suitable for smart stamping, smart stamping is high to planarity requirements.The patent No. 201080002531.4 discloses a kind of carbon steel sheet and manufacture method thereof of carburizing and quenching excellence, the Mn of its carbon steel sheet is containing being amount 0.85% ~ 2.0%, B content 0.0005%-0.01%, the K value represented with 3C+Mn+0.5Si is more than 2.0, compared with GB 45 steel, the material of the method adds B, and Mn comparision contents is high, difficult buying, material cost is high.
Summary of the invention
Main purpose of the present invention is to provide a kind of 45 steel essence stamping thin layer carburizing heat treating methods, while being intended to improve its hardness, reduces its quenching temperature low.
For achieving the above object, the invention provides a kind of 45 steel essence stamping thin layer carburizing heat treating methods, comprise the following steps:
After the fixture that multiple 45 steel essence stampings are housed is hung in pit carburizing furnace, the method adopting kerosene to instil carries out thin layer carburizing process to described 45 steel essence stampings, and wherein carburizing temperature is 900 ~ 920 DEG C, and carburized depth is no more than 0.2mm;
After carburizing treatment is complete and be equipped with 45 steel essence stampings fixture hang out described pit carburizing furnace after, immersed in oil groove and carried out quench treatment;
Described fixture is taken out cooling from oil groove, multiple 45 steel essence stampings is dismantled from described fixture, and the 45 steel essence stampings disassembled are put into cleaning machine and cleaned, scavenging solution is 5 ~ 10% aqueous sodium carbonates;
45 steel essence stampings after cleaning are carried out temper, and tempering temperature is 180 ~ 220 DEG C.
Preferably, when fixture is taken out from oil groove, described clip vertical is hung on oil groove and make its sky be cooled to room temperature, to ensure that the oil droplet of piece surface enters in oil groove.
Preferably, in quench treatment process, make 45 steel essence stampings vertically enter oil, immerse after in oil groove in 45 steel essence stampings and make it rotate around a fixed-direction.
Preferably, described fixture comprises suspension rod, is positioned at the base plate be fixedly connected with below described suspension rod and with it, and the multiple screws be positioned on described base plate, wherein, each screw is all hung with an iron wire, described iron wire is formed with multiple closed level for hanging 45 steel essence stampings by the mode of knotting, and the colligation knot that often closed level described in adjacent two is twisted into by iron wire separates.
Preferably, described base plate is disc, and multiple described screw is uniformly distributed at the circumferential direction of base plate.
Preferably, described fixture adopts following methods to sling multiple 45 steel essence stampings:
A, iron wire is carried out anneal in box-type furnace, wherein, annealing time is 2 hours, and annealing temperature is 700 DEG C;
B, the iron wire having moved back fire is cut into the segment that length is 400-1000mm, obtains the short iron wire of multistage;
C, by described short iron wire along lengthwise centers doubling, through 45 steel essence stampings on hole after knotting and again through next 45 steel essence stampings, make multiple described 45 steel essence stampings between dispersion hang on described short iron wire;
D, successively all screws on fixture have all been overworked short iron wire and this short iron wire is installed with multiple described 45 steel essence stampings.
The 45 steel essence stamping thin layer carburizing heat treating methods that the present invention proposes, the oil-quenched method of thin layer carburizing is adopted to heat-treat domestic 45 steel essence stampings 1 in pit carburizing furnace, case depth is below 0.2mm, the hardness of essence stamping reaches more than HRC47, relative to prior art, without the need to adding B and Mn, there is the advantage that cost is low, meanwhile, have quenching temperature low, be out of shape little, planeness is high and without cracking advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of 45 steel essence stampings in the present invention 45 steel essence stamping thin layer carburizing heat treating method;
Fig. 2 is the structural representation of fixture in the present invention 45 steel essence stamping thin layer carburizing heat treating method;
The plan structure schematic diagram that Fig. 3 is the fixture shown in Fig. 2;
Fig. 4 is the structural representation of the present invention 45 steel essence stamping thin layer carburizing heat treating method when colligation 45 steel essence stamping;
Fig. 5 is the structural representation of the base plate shown in Fig. 2.
In figure, 1:45 steel essence stamping, 1-1: splined hole, 2: fixture, 3: suspension rod, 4: base plate, 4-1: profile hole, 4-2: centre hole, 4-3: threaded hole, 5: screw, 6: upper nut, 7: lower nut, 8: short iron wire, 8-1: closed level, 8-2: colligation is tied.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See figures.1.and.2, in this preferred embodiment, a kind of 45 steel essence stamping thin layer carburizing heat treating methods, comprise the following steps:
Step S10, after the fixture 2 that multiple 45 steel essence stampings 1 are housed is hung in pit carburizing furnace, the method adopting kerosene to instil carries out thin layer carburizing process to described 45 steel essence stampings 1, and wherein carburizing temperature is 900 ~ 920 DEG C, and carburized depth is no more than 0.2mm;
Step S20, after after carburizing treatment is the complete and fixture 2 that 45 steel essence stampings 1 are housed hangs out (use driving hanging out fixture 2) described pit carburizing furnace, is immersed in oil groove and is carried out quench treatment;
In quench treatment process, make 45 steel essence stampings 1 vertically enter oil, and immerse in 45 steel essence stampings 1 and after in oil groove, to make it rotate around a fixed-direction (clockwise or counterclockwise).
By 45 steel essence stampings 1 vertically enter oil can make its back plane degree that quenches good, be out of shape little.Immerse after in oil groove in 45 steel essence stampings 1, make it rotate around a fixed-direction, 45 steel essence stampings 1 can be made uniformly to contact with quenching oil, improve the planeness after its quenching.
Step S30, described fixture 2 is taken out from oil groove cooling (using driving hanging out fixture 2), multiple 45 steel essence stampings 1 are dismantled from described fixture 2 and (can use vice that multiple colligation knot 8-2 of iron wire are knocked off or twisted into two parts, obtain the multiple 45 steel essence stampings 1 after being separated), and the 45 steel essence stampings 1 disassembled are put into cleaning machine and cleaned, scavenging solution is 5 ~ 10% aqueous sodium carbonates;
Step S40,45 steel essence stampings 1 after cleaning are carried out temper, and tempering temperature is 180 ~ 220 DEG C.
In step s 30, when fixture 2 is taken out from oil groove, fixture 2 is vertically hung on oil groove and make its sky be cooled to room temperature, to ensure that the oil droplet of piece surface enters in oil groove, decrease the loss of quenching oil.
Particularly, with reference to Fig. 2 to Fig. 4, fixture 2 comprises suspension rod 3, is positioned at the base plate 4 be fixedly connected with below suspension rod 3 and with it, and the multiple screws 5 be positioned on base plate 4, wherein, each screw 5 is all hung with an iron wire, and iron wire is formed with multiple closed level 8-1 for hanging 45 steel essence stampings 1 by the mode of knotting, and the colligation knot 8-2 that often adjacent two closed level 8-1 are twisted into by iron wire separates.
With reference to Fig. 2 and Fig. 3, suspension rod 3 is the stainless steel round bar of diameter phi 30-60mm, bending to stainless steel round bar symmetry 45-90 ° (the present embodiment φ 30mm, 80 °).Suspension rod 3, for entering pit carburizing furnace in 45 steel essence stampings 1 and enter in wet goods process, is convenient to hoisting fixture 2 of driving a vehicle.
With reference to Fig. 5, in the present embodiment, base plate 4 is in disc, and multiple screw 5 is uniformly distributed at the circumferential direction of base plate 4, to make fixture 2 uniform force.Base plate 4 offers multiple profile hole 4-1, centre hole 4-2 and multiple threaded hole 4-3.
Multiple profile hole 4-1 is uniformly distributed at the circumferential direction of base plate 4, and multiple threaded hole 4-3 is uniformly distributed at the circumferential direction of base plate 4.Base plate 4 is stainless steel raw sheet material.Profile hole 4-1 is arranged 6 ~ 24 (the present embodiment is 6), and threaded hole 4-3 quantity is 24 ~ 48 (the present embodiment is 24).The size of base plate 4 and threaded hole 4-3 specifically determine according to the size of 45 steel essence stampings 1, after guarantee is tied with the iron wire loading of 45 steel essence stampings 1, contact between multiple 45 steel essence stampings 1 without face.
Screw 5 is fixedly connected with lower nut 7 by upper nut 6 with base plate 4, and upper nut 6 and lower nut 7 are located on the upper and lower end face of base plate 4 respectively.M8-M16 sunk screw 5(the present embodiment M8 selected by screw 5), the length of screw 5 is ensure that fixing latter non-threaded section of screw 5 exposes above upper nut 6, to be linked into the closed level 8-1 being tied with 45 steel essence stamping 1 iron wires.
In the present embodiment, utilize iron wire and fixture 2 to smart stamping clamping, fixture 2 structure is simple.Fixture 2 base plate 4 adopts the manufacture of stainless steel round plate linear cutter, and compared with conventional cast high temperature steel fixture, its cost is low.In addition, tie 8-2 by the colligation between the iron wire of surperficial colligation and two parts between multiple 45 steel essence stampings 1 and separate, avoid face to contact, ensure carburizing and quenching uniformity.
Particularly, with reference to Fig. 2 to Fig. 5, described fixture 2 adopts following methods to sling multiple 45 steel essence stampings 1:
A, iron wire carried out in box-type furnace anneal (anneal reduces the hardness of iron wire, makes the knotting that it is more conducive to when colligation part), wherein, annealing time is 2 hours, and annealing temperature is 700 DEG C;
B, the iron wire having moved back fire is cut into the segment that length is 400-1000mm, obtains the short iron wire 8 of multistage;
C, by described short iron wire 8 along lengthwise centers doubling, through knotting behind the hole in 45 steel essence stampings 1 and again through next 45 steel essence stamping 1, dispersion between multiple described 45 steel essence stampings 1 is made to hang on (on each closed level 8-1, colligation smart stamping, additionally reserves a closed level 8-1 for short iron wire 8 is hung on screw 5) on described short iron wire 8;
D, successively all screws 5 on fixture 2 have all been overworked short iron wire 8 and this short iron wire 8 is installed with multiple described 45 steel essence stampings 1.
The 45 steel essence stamping thin layer carburizing heat treating methods that the present embodiment proposes, the oil-quenched method of thin layer carburizing is adopted to heat-treat domestic 45 steel essence stampings 1 in pit carburizing furnace, case depth is below 0.2mm, the hardness of essence stamping reaches more than HRC47, relative to prior art, without the need to adding B and Mn, there is the advantage that cost is low, meanwhile, have quenching temperature low, be out of shape little and without cracking advantage.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing specification sheets of the present invention and accompanying drawing content to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. 45 steel essence stamping thin layer carburizing heat treating methods, is characterized in that, comprise the following steps:
After the fixture that multiple 45 steel essence stampings are housed is hung in pit carburizing furnace, the method adopting kerosene to instil carries out thin layer carburizing process to described 45 steel essence stampings, and wherein carburizing temperature is 900 ~ 920 DEG C, and carburized depth is no more than 0.2mm;
After carburizing treatment is complete and be equipped with 45 steel essence stampings fixture hang out described pit carburizing furnace after, immersed in oil groove and carried out quench treatment;
Described fixture is taken out cooling from oil groove, multiple 45 steel essence stampings is dismantled from described fixture, and the 45 steel essence stampings disassembled are put into cleaning machine and cleaned, scavenging solution is 5 ~ 10% aqueous sodium carbonates;
45 steel essence stampings after cleaning are carried out temper, and tempering temperature is 180 ~ 220 DEG C.
2. 45 steel essence stamping thin layer carburizing heat treating methods as claimed in claim 1, is characterized in that, when being taken out from oil groove by fixture, described clip vertical hung on oil groove and make its sky be cooled to room temperature, to ensure that the oil droplet of piece surface enters in oil groove.
3. 45 steel essence stamping thin layer carburizing heat treating methods as claimed in claim 1, is characterized in that, in quench treatment process, make 45 steel essence stampings vertically enter oil, immerse after in oil groove make it rotate around a fixed-direction in 45 steel essence stampings.
4. as 45 steel essence stamping thin layer carburizing heat treating methods in claims 1 to 3 as described in any one, it is characterized in that, described fixture comprises suspension rod, is positioned at the base plate be fixedly connected with below described suspension rod and with it, and the multiple screws be positioned on described base plate, wherein, each screw is all hung with an iron wire, and described iron wire is formed with multiple closed level for hanging 45 steel essence stampings by the mode of knotting, and the colligation knot that often closed level described in adjacent two is twisted into by iron wire separates.
5. 45 steel essence stamping thin layer carburizing heat treating methods as claimed in claim 1, it is characterized in that, described base plate is disc, and multiple described screw is uniformly distributed at the circumferential direction of base plate.
6. 45 steel essence stamping thin layer carburizing heat treating methods as claimed in claim 4, is characterized in that, described fixture adopts following methods to sling multiple 45 steel essence stampings:
A, iron wire is carried out anneal in box-type furnace, wherein, annealing time is 2 hours, and annealing temperature is 700 DEG C;
B, the iron wire having moved back fire is cut into the segment that length is 400-1000mm, obtains the short iron wire of multistage;
C, by described short iron wire along lengthwise centers doubling, through 45 steel essence stampings on hole after knotting and again through next 45 steel essence stampings, make multiple described 45 steel essence stampings between dispersion hang on described short iron wire;
D, successively all screws on fixture have all been overworked short iron wire and this short iron wire is installed with multiple described 45 steel essence stampings.
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| CN201510321178.0A CN104862642A (en) | 2015-06-12 | 2015-06-12 | 45-steel precisely punched part thin layer carburizing heat treatment method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641062A (en) * | 2004-11-30 | 2005-07-20 | 湖州和孚三联刀具厂 | Screw blade carburization process and auxiliary apparatus |
| CN103667613A (en) * | 2013-12-09 | 2014-03-26 | 常熟市永达化工设备厂 | Heat treatment method for preventing deformation of rolled steel |
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2015
- 2015-06-12 CN CN201510321178.0A patent/CN104862642A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641062A (en) * | 2004-11-30 | 2005-07-20 | 湖州和孚三联刀具厂 | Screw blade carburization process and auxiliary apparatus |
| CN103667613A (en) * | 2013-12-09 | 2014-03-26 | 常熟市永达化工设备厂 | Heat treatment method for preventing deformation of rolled steel |
Non-Patent Citations (2)
| Title |
|---|
| 付广艳: "《机械工程材料》", 28 February 2014 * |
| 杨满: "《实用热处理技术手册》", 30 June 2010 * |
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