CN104289858A - 42CrMoE structural alloy steel material and pin shaft processing method - Google Patents
42CrMoE structural alloy steel material and pin shaft processing method Download PDFInfo
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- CN104289858A CN104289858A CN201310299702.XA CN201310299702A CN104289858A CN 104289858 A CN104289858 A CN 104289858A CN 201310299702 A CN201310299702 A CN 201310299702A CN 104289858 A CN104289858 A CN 104289858A
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- bearing pin
- pin shaft
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a pin shaft processing method using 42CrMoE structural alloy steel as a material, and belongs to the technical field of heat treatment. The adopted processing technology comprises the steps of blank forging-normalization-rough turning-finish turning-insertion-finish turning-heat treatment-cold treatment-surface treatment-finish grinding-grinding. The adopted processing technology is simple and reasonable, and consists of the technologies of die forging, machining, heat treatment and grinding, so that a pin shaft is excellent in frictional performance and low in heat; the pin shaft obtained by the die forging is high in size precision, is smooth in surface, and is high in production efficiency; and the quenching is performed firstly in the heat treatment, and the tempering is performed after the cold treatment, so that the heart roughness and the surface hardness of the pin shaft are largely improved, and the wear resistance is enhanced. Through the nitriding treatment, the pin shaft has high fatigue strength, the corrosion resistance is improved, the processing procedures are simple, and the cost is low; and finally, the finish grinding is adopted to enable the pin shaft to have good frictional performance and low heat and to facilitate the prolonging of the service life of the pin shaft.
Description
Technical field
The invention belongs to technical field of heat treatment, relate to bearing pin and structural alloy steel thereof.Especially a kind of 42CrMoE structural alloy steel is the bearing pin processing method of material.
Background technology
Bearing pin, when for connecting drive rod and reciprocating driven member, can be subject to very strong alternating shock load.Profit as, the bearing pin of the power head device part of existing rig, operationally will be subject to very strong alternating shock load.The bearing pin of the power head device of existing rig, its two ends are inserted on the left and right engaging lug of unit head balladeur train respectively, middle part is then set with the connecting plate of power head box, because bearing pin two ends and middle part are all directly contact with parts, when drilling machine construction, unit head can be subject to various continuous impact and vibrations, and bearing pin does not have cushioning effect, cause related components to be usually damaged, have a strong impact on the stability that rig runs; For another example in medical machinery, often need to use bearing pin, such as, for the drive motors of medical injection pump, in order to the object of damping, by the flexible clutch be made up of flexible material (such as, rubber, silica gel etc.) to connect motor output shaft and driving pulley.In prior art, open type connecting pin is utilized to be connected with driving belt pulley shaft with motor output shaft and shaft coupling by shaft coupling, this open type connecting pin is installed inconvenient, and in shaft coupling running, be easy to flexible clutch to scratch even make shaft coupling ftracture, this directly threatens the security reliability that machine runs, and even may cause operational failure; As everyone knows, locate mode between two parts relatively do not moved, traditional method uses sells directly to households or taper pin location, although this mode is simple, but there is a lot of drawback: sell directly to households or taper pin size restricted, be applicable between stressed two parts not quite; The Accuracy that direct selling and taper pin are reamed is large; Sell directly to households and the taper pin bad control of precision after a single use, recycling rate of waterused is low.
Summary of the invention
For the deficiencies in the prior art, the present invention, in order to solve the problem, devises the bearing pin processing method that a kind of 42CrMoE structural alloy steel is material.
The present invention devises the bearing pin processing method that a kind of 42CrMoE structural alloy steel is material, its material mainly includes the degree of following elements: C0.79%-0.88%, Mn0.98%-1.12%, Ti0.25%-0.31%, Si1.56%-2.54%, Cr1.23%-1.58%, Pb0.25%-0.35%, S<0.02%, P<0.03%.Preferred C0.81%-0.85%, Mn0.99%-1.01%, Ti0.26%-0.30%, Si1.51%-2.42%, Cr1.27%-1.41%, Pb0.30%-0.32%, S<0.02%, P<0.03%.Its processing technology key technology is as follows: (1) blanking: jumping-up pulling bar, by the bar jumping-up of above-mentioned material, by bar, pier is thick vertically, after pull out blank again, again pier thick after forging upset carry out same jumping-up in the other direction and make it become cylinder with pulling, in upsetting process, heating is wanted evenly, make distortion even, and jumping-up face is wanted and axes normal, blank original height and diameter ratio are controlled be less than within 2.5 simultaneously, after repeatedly jumping-up, avoid tearing of forging, and make even tissue, grain refinement; Blank after jumping-up is carried out base at upset die, so that metal reasonable layout is also well full of impression, makes blank substantially meet bearing pin shape; Forging die is carried out to bearing pin: first bearing pin is put into blocker, the counterdie that is connected with die-cushion admittedly to be moved up and down with prohibiting together with the patrix of hanging one's head, blank is made to be full of whole impression under the effect of impulsive force, then extrude in finish impression, in extrusion process, make impression size amplify an amount of contraction than bearing pin.Deformation temperature controls at 950-1050 DEG C simultaneously, extruding force controls at 24-37Mpa, (2) bearing pin after die forging, carry out normalized treatment, put into heating furnace by bearing pin and be heated to 1000-1100 DEG C, insulation 2.5-4h, make part complete austenitizing and homogenising, Homogeneous cooling in the air of circulation naturally, (3) roughing is carried out to bearing pin, finish turning other end, draw keyway line, with markd end face and excircle orientation, wiring centering, keyseat, repair filing key groove burr, machining accuracy is IT7-8, surface roughness is Ra=1.31-0.45 μm, (4) bearing pin after fine finishining is heat-treated, namely isothermal hardening and high tempering is adopted, the bearing pin be heated to by bearing pin after the covert temperature of bainiteization is quenched in salt bath, heating-up temperature is 825-900 DEG C, temperature retention time is 8-11h, then ice-cold process, thin ice pellets being sprayed at a high speed bearing pin surface makes it coldly fast go, thus ensure that bearing pin distortion is not littlely ftractureed, high tempering process again, bearing pin is heated to 610-660 DEG C, insulation 4.5-6.2h, progressively cool to room temperature, hardness is 59-62HRC, make the intensity of bearing pin, plasticity, the combination properties such as toughness improve.(5) nitriding coprocessing, adopt cryogenic gas method, hung in high temperature furnace by bearing pin, then pass into ammonia, temperature reaches 620-710 DEG C, insulation 11-16 hour, N ion is seeped into surface of the work, and depth of nitration is 1.01-1.12mm, is placed in by bearing pin and is connected with in the stove of nitrogen, being heated to 900-950 DEG C, is that carrier is by C with nitrogen
3h
8bring reactor into, TiN is deposited on bearing pin surface, thus make bearing pin have high tired intensity, wearability and center toughness, (6) bearing pin after effects on surface process carries out fine grinding, adopt laser mill, the cylindrical of grinding bearing pin, not only increases the surface quality of bearing pin but also improves dimensional accuracy and the form accuracy of bearing pin.
The invention has the advantages that and add Ti element in the material selected, the center toughness of bearing pin and case hardness are improved all greatly, wearability increases.And manufacturing procedure is simple, with low cost, and the long service life of bearing pin, bearing pin after fine finishining is heat-treated simultaneously, thus ensure that bearing pin distortion is not littlely ftractureed, make the intensity of bearing pin, plasticity, the combination properties such as toughness improve, by carbo-nitriding process, adopt cryogenic gas method, thus make bearing pin have high tired intensity, wearability and seizure resistance, bearing pin after last effects on surface process carries out fine grinding, adopt laser mill, the cylindrical of grinding bearing pin, not only increase the surface quality of bearing pin but also improve dimensional accuracy and the form accuracy of bearing pin.
Detailed description of the invention
Embodiment one
Devise bearing pin processing method, 42CrMoE structural alloy steel is adopted to be material, it mainly includes the degree of following elements: C0.79%-0.88%, Mn0.98%-1.12%, Ti0.25%-0.31%, Si1.56%-2.54%, Cr1.23%-1.58%, Pb0.25%-0.35%, S<0.02%, P<0.03%.Its processing technology key technology is as follows: (1) blanking: jumping-up pulling bar, blank original height and diameter ratio control be less than within 2.5, forging die is carried out to bearing pin: first bearing pin is put into blocker, the counterdie that is connected with die-cushion admittedly to be moved up and down with prohibiting together with the patrix of hanging one's head, blank is made to be full of whole impression under the effect of impulsive force, then extrude in finish impression, in extrusion process, make impression size amplify an amount of contraction than bearing pin.Deformation temperature controls at 1000 DEG C simultaneously, extruding force controls at 35Mpa, (2) bearing pin after die forging, carry out normalized treatment, put into heating furnace by bearing pin and be heated to 1100 DEG C, insulation 3h, (3) roughing is carried out to bearing pin, machining accuracy is IT8, surface roughness is Ra=0.89 μm, (4) bearing pin after fine finishining is heat-treated, heating-up temperature is 900 DEG C, temperature retention time is 10h, then ice-cold process, thin ice pellets being sprayed at a high speed bearing pin surface makes it coldly fast go, bearing pin is heated to 640 DEG C, insulation 5.2h, progressively cool to room temperature, hardness is 61HRC.(5) nitriding coprocessing, bearing pin is hung in high temperature furnace, pass into ammonia again, temperature reaches 680 DEG C, is incubated 13 hours, N ion is seeped into surface of the work, depth of nitration is 1.12mm, is placed in by bearing pin and is connected with in the stove of nitrogen, be heated to 930 DEG C, (6) bearing pin after effects on surface process carries out fine grinding, adopts laser mill.
Embodiment two
Devise bearing pin processing method, 42CRMOE structural alloy steel is adopted to be material, it mainly includes the degree of following elements: C0.81%-0.85%, Mn0.99%-1.01%, Ti0.26%-0.30%, Si1.51%-2.42%, Cr1.27%-1.41%, Pb0.30%-0.32%, S<0.02%, P<0.03%.Its processing technology key technology is as follows: (1) blanking: jumping-up pulling bar, blank original height and diameter ratio control be less than within 2.5, forging die is carried out to bearing pin: first bearing pin is put into blocker, the counterdie that is connected with die-cushion admittedly to be moved up and down with prohibiting together with the patrix of hanging one's head, blank is made to be full of whole impression under the effect of impulsive force, then extrude in finish impression, in extrusion process, make impression size amplify an amount of contraction than bearing pin.Deformation temperature controls at 970 DEG C simultaneously, extruding force controls at 26Mpa, (2) bearing pin after die forging, carry out normalized treatment, put into heating furnace by bearing pin and be heated to 1000 DEG C, insulation 3h, (3) roughing is carried out to bearing pin, machining accuracy is IT7, surface roughness is Ra=1.01 μm, (4) bearing pin after fine finishining is heat-treated, heating-up temperature is 850 DEG C, temperature retention time is 8h, then ice-cold process, thin ice pellets being sprayed at a high speed bearing pin surface makes it coldly fast go, bearing pin is heated to 620 DEG C, insulation 4.7h, progressively cool to room temperature, hardness is 60HRC.(5) nitriding coprocessing, bearing pin is hung in high temperature furnace, pass into ammonia again, temperature reaches 620-710 DEG C, is incubated 12 hours, N ion is seeped into surface of the work, depth of nitration is 1.03mm, is placed in by bearing pin and is connected with in the stove of nitrogen, be heated to 900 DEG C, (6) bearing pin after effects on surface process carries out fine grinding, adopts laser mill.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (4)
1. a bearing pin material 42CrMoE structural alloy steel, it is characterized in that the degree including following elements: C0.79%-0.88%, Mn0.98%-1.12%, Ti0.25%-0.31%, Si1.56%-2.54%, Cr1.23%-1.58%, Pb0.25%-0.35%, S<0.02%, P<0.03%.
2. the 42CrMoE structural alloy steel according to claims 1, is characterized in that: C0.81%-0.85%, Mn0.99%-1.01%, Ti0.26%-0.30%, Si1.51%-2.42%, Cr1.27%-1.41%, Pb0.30%-0.32%, S<0.02%, P<0.03%.
3. a kind of 42CrMoE structural alloy steel according to claims 1 or 2 is the bearing pin processing method of material, it is characterized in that: (1) blanking: jumping-up pulling bar, by the bar jumping-up of above-mentioned material, by bar, pier is thick vertically, after pull out blank again, the thick rear forging upset of pier again, carrying out same jumping-up in the other direction makes it become cylinder with pulling, in upsetting process, heating is wanted evenly, make distortion even, and jumping-up face is wanted and axes normal, blank original height and diameter ratio are controlled be less than within 2.5 simultaneously, after repeatedly jumping-up, avoid tearing of forging, and make even tissue, grain refinement, blank after jumping-up is carried out base at upset die, so that metal reasonable layout is also well full of impression, makes blank substantially meet bearing pin shape, forging die is carried out to bearing pin: first bearing pin is put into blocker, the counterdie that is connected with die-cushion admittedly to be moved up and down with prohibiting together with the patrix of hanging one's head, blank is made to be full of whole impression under the effect of impulsive force, then extrude in finish impression, in extrusion process, make impression size amplify an amount of contraction than bearing pin.Deformation temperature controls at 950-1050 DEG C simultaneously, extruding force controls at 24-37Mpa, (2) bearing pin after die forging, carry out normalized treatment, put into heating furnace by bearing pin and be heated to 1000-1100 DEG C, insulation 2.5-4h, make part complete austenitizing and homogenising, Homogeneous cooling in the air of circulation naturally, (3) roughing is carried out to bearing pin, finish turning other end, draw keyway line, with markd end face and excircle orientation, wiring centering, keyseat, repair filing key groove burr, machining accuracy is IT7-8, surface roughness is Ra=1.31-0.45 μm, (4) bearing pin after fine finishining is heat-treated, namely isothermal hardening and high tempering is adopted, the bearing pin be heated to by bearing pin after the covert temperature of bainiteization is quenched in salt bath, heating-up temperature is 825-900 DEG C, temperature retention time is 8-11h, then ice-cold process, thin ice pellets being sprayed at a high speed bearing pin surface makes it coldly fast go, thus ensure that bearing pin distortion is not littlely ftractureed, high tempering process again, bearing pin is heated to 610-660 DEG C, insulation 4.5-6.2h, progressively cool to room temperature, hardness is 59-62HRC, make the intensity of bearing pin, plasticity, the combination properties such as toughness improve, (5) nitriding coprocessing, adopt cryogenic gas method, bearing pin is hung in high temperature furnace, pass into ammonia again, temperature reaches 620-710 DEG C, insulation 11-16 hour, N ion is seeped into surface of the work, depth of nitration is 1.01-1.12mm, being placed in by bearing pin is connected with in the stove of nitrogen, be heated to 900-950 DEG C, be that carrier is by C with nitrogen
3h
8bring reactor into, TiN is deposited on bearing pin surface, thus make bearing pin have high tired intensity, wearability and center toughness, (6) bearing pin after effects on surface process carries out fine grinding, adopt laser mill, the cylindrical of grinding bearing pin, not only increases the surface quality of bearing pin but also improves dimensional accuracy and the form accuracy of bearing pin.
4. one kind adopts the 42CrMoE structural alloy steel of claim 1 or 2 and adopts the bearing pin that the method for claim 3 manufactures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310299702.XA CN104289858A (en) | 2013-07-16 | 2013-07-16 | 42CrMoE structural alloy steel material and pin shaft processing method |
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| CN201310299702.XA CN104289858A (en) | 2013-07-16 | 2013-07-16 | 42CrMoE structural alloy steel material and pin shaft processing method |
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| CN104289858A true CN104289858A (en) | 2015-01-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543664A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Preparation method of abrasion-resistant roller of roller bearing |
| CN105886738A (en) * | 2016-05-03 | 2016-08-24 | 成都亨通兆业精密机械有限公司 | Heat treatment technology for hinge pin |
| CN108330256A (en) * | 2018-03-27 | 2018-07-27 | 王华银 | A kind of quenching technical of hard-wearing pin |
| CN109611429A (en) * | 2018-12-27 | 2019-04-12 | 陕西铁马铸锻有限公司 | Pin shaft and its heat treatment process |
| CN109760715A (en) * | 2018-12-27 | 2019-05-17 | 陕西铁马铸锻有限公司 | Goat latch hook and its heat treatment process |
| CN115246062A (en) * | 2022-07-14 | 2022-10-28 | 浙江米皇新材股份有限公司 | Novel low-loss production process for automobile battery aluminum-clad section positioning pin |
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2013
- 2013-07-16 CN CN201310299702.XA patent/CN104289858A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543664A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Preparation method of abrasion-resistant roller of roller bearing |
| CN105886738A (en) * | 2016-05-03 | 2016-08-24 | 成都亨通兆业精密机械有限公司 | Heat treatment technology for hinge pin |
| CN108330256A (en) * | 2018-03-27 | 2018-07-27 | 王华银 | A kind of quenching technical of hard-wearing pin |
| CN109611429A (en) * | 2018-12-27 | 2019-04-12 | 陕西铁马铸锻有限公司 | Pin shaft and its heat treatment process |
| CN109760715A (en) * | 2018-12-27 | 2019-05-17 | 陕西铁马铸锻有限公司 | Goat latch hook and its heat treatment process |
| CN109611429B (en) * | 2018-12-27 | 2021-04-02 | 陕西铁马铸锻有限公司 | Pin shaft and heat treatment process thereof |
| CN115246062A (en) * | 2022-07-14 | 2022-10-28 | 浙江米皇新材股份有限公司 | Novel low-loss production process for automobile battery aluminum-clad section positioning pin |
| CN115246062B (en) * | 2022-07-14 | 2023-11-03 | 浙江米皇新材股份有限公司 | Novel low-loss production process for aluminum-clad profile positioning pin of automobile battery |
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Application publication date: 20150121 |