CN103820624B - Salt-bath furnace quenching method for teeth of chain wheel - Google Patents
Salt-bath furnace quenching method for teeth of chain wheel Download PDFInfo
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- CN103820624B CN103820624B CN201210467444.7A CN201210467444A CN103820624B CN 103820624 B CN103820624 B CN 103820624B CN 201210467444 A CN201210467444 A CN 201210467444A CN 103820624 B CN103820624 B CN 103820624B
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Abstract
The invention relates to a salt-bath furnace quenching method for teeth of a chain wheel. The method comprises the following steps of (1) placing a mixture containing BaCl2 and KCl in an intermediate-temperature salt-bath furnace for heating, wherein based on the total amount of 100 parts, the mixture contains 65 to 75 parts by weight of BaCl2 and 25 to 35 parts by weight of KCl, the mixture is heated to be completely melted at the heating temperature of 720 to 940 DEG C, and the melted mixture is the melt of a salt bath; (2) placing the teeth of the chain wheel in the salt bath for heating, wherein the heating temperature of the salt bath is 900 to 920 DEG C, and the heating time is set to be 26 to 30 seconds per millimeter of the tooth thickness of the chain wheel; (3) performing rapid quenching by utilizing a quenching medium after heating and heat preservation; (4) performing tempering heat preservation for 3.5 to 4.5 hours after quenching, and after heat preservation, discharging the teeth of the chain wheel out of the furnace, and air-cooling the teeth. According to the method, a salt-bath furnace quenching process for the teeth of the chain wheel is adopted, so that the hardened layer depth can reach more than 12mm; moreover, hardened layers with different depths can be obtained by regulating the heating time of the salt-bath furnace; the salt-bath furnace quenching process is high in the heating speed and convenient to operate, a workpiece is difficult to oxidize and decarburize, and the temperature is easy to control.
Description
Technical field
The present invention relates to a kind of mechanical manufacturing field, be specifically related to a kind of sprocket tooth part salt bath furnace quenching method.
Background technology
The sprocket tooth part hard surfacings such as current scraper conveyer and first conveyer of digging machine adopt surface hardening by flame heating, sprocket wheel material is 42CrMo, acetylene-oxygen flame is utilized to heat sprocket tooth part surface, and the technique of quench cooled immediately, but adopt and have following shortcoming in this way: the depth of hardening zone of surface hardening by flame heating is generally 2 ~ 6mm, the depth of hardening zone requirement that sprocket wheel is excessively dark, can cause the seriously overheated of steel part top layer, produces quenching crack; Sprocket tooth part is after flame quenching, and surface hardness is uneven, and namely on difference, hardness difference is more, reaches more than HRC10; Sprocket tooth part is after flame quenching, and surface hardening layer depth is uneven, and namely on difference, depth of hardening zone difference is more, reaches more than 3mm; Sprocket tooth part is complex-shaped and sprocket wheel specification kind is more, higher to the requirement of quenching machine, generally adopts import equipment, and required cost of equipment is larger; Sprocket tooth part is complex-shaped, adopts manual operation to the operant level of workman and skill requirement is higher and labour intensity is larger.
Summary of the invention
The present invention is directed to rather after the hard surfacing of prior art sprocket tooth part, and the situation such as avoid the uneven and depth of hardening zone of surface hardness inconsistent, a kind of sprocket tooth part salt bath furnace quenching method is provided, make depth of hardening zone after sprocket tooth part hard surfacing identical and in the uniformity of hardness difference of whole quench-hardened case within HRC5, obtain the surface hardness of the sprocket tooth part of high-quality, improve the reliability of sprocket wheel quality, stability and work-ing life, reduce facility investment expense and to labor claim simultaneously.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 65 ~ 75, KCl be 25 ~ 35, BaCl
2weight part add that the weight part of KCl is 100, Heating temperature is 720 ~ 940 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, salt bath heating temperature is 900 ~ 920 DEG C, presses sprocket wheel transverse tooth thickness 26 ~ 30S/mm heat-up time and sets;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast;
(4) quenching carries out tempering insulation after terminating again, and tempering insulation time is 3.5-4.5 hour, soaking time to after to come out of the stove air cooling.
Described mixture is containing BaCl
2be 7:3 with the weight ratio of KCl.
The described salt bath heating time presses sprocket wheel transverse tooth thickness 28S/mm and sets.
Described quenchant is cooling oil, and tempering temperature is 220 ~ 240 DEG C.
Described quenchant is water and oily double quenching, and tempering temperature is 220 ~ 260 DEG C.
Described tempering insulation time is 4 hours.
The present invention adopts sprocket tooth part salt bath furnace quenching technology, and the tempering temperature after quick cooling oil quenching is 220 ~ 240 DEG C, and can obtain sprocket tooth part surface hardness is HRC49 ~ 53, tempering temperature after water+oily double quenching is 220 ~ 260 DEG C, can obtain sprocket tooth part surface hardness is HRC51 ~ 55, this quenching technology depth of hardening zone can reach more than 12mm, and the quench-hardened case of different depths can be obtained heat-up time by adjustment salt bath furnace, the present invention adopts salt bath furnace quenching technology, rate of heating is fast, workpiece not easily oxidation and decarbonization simultaneously, Heating temperature is even, easy temperature control system, easy to operate etc., avoid sprocket tooth part surface due to the uneven and rather of quenching of Heating temperature, make each depth of hardening zone after sprocket tooth part hard surfacing identical and in the uniformity of hardness difference of whole quench-hardened case within HRC5, obtain the surface hardness of the sprocket tooth part of high-quality, steady quality, reliably, improve the work-ing life of sprocket wheel.
Embodiment
Embodiment 1
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, the use temperature scope of middle thermohaline liquid furnace is 0-950 DEG C, wherein BaCl
2weight part be the weight part of 65kg, KCl be 35kg, Heating temperature is 720 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 26S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 230 DEG C, and tempering insulation time is 3.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 2
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 750 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 900 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 220 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 3
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 75kg, KCl be 25kg, Heating temperature is 850 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 920 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 240 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 4
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 67.5kg, KCl be 32.5kg, Heating temperature is 900 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 30S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 225 DEG C, and tempering insulation time is 4.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 5
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 940 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 915 DEG C, presses sprocket wheel transverse tooth thickness 27S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 235 DEG C, and tempering insulation time is 3.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 6
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 75kg, KCl be 25kg, Heating temperature is 720 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 905 DEG C, presses sprocket wheel transverse tooth thickness 29S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 240 DEG C, and tempering insulation time is 4.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 7
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 930 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 900 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 220 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 8
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 75kg, KCl be 25kg, Heating temperature is 800 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is water and oily biliquid
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 220 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 9
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 72.5kg, KCl be 27.5kg, Heating temperature is 850 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 920 DEG C, presses sprocket wheel transverse tooth thickness 30S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is water and oily biliquid
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 260 DEG C, and tempering insulation time is 3.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 10
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 65kg, KCl be 35kg, Heating temperature is 910 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 26S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is water and oily biliquid
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 245 DEG C, and tempering insulation time is 4.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 11
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 930 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 900 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is water and oily biliquid
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 235 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 12
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 930 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 900 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 220 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 13
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 930 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 900 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast; Quenchant is cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 240 DEG C, and tempering insulation time is 4.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 14
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 67kg, KCl be 33kg, Heating temperature is 900 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 30S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is water and oily biliquid;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 220 DEG C, and tempering insulation time is 3.5 hours, soaking time to after to come out of the stove air cooling.
Embodiment 15
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 900 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 910 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is water and oily biliquid;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 260 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Embodiment 16
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 900 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, the long 60mm of sprocket wheel transverse tooth thickness 53mm, tooth, and salt bath heating temperature is 920 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 53mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is quick cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 230 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Following table be the data that detect of the sprocket wheel made in the present embodiment as following table:
| Depth of hardening zone/mm | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Sprocket wheel hardness/HRC | 53.4 | 53.4 | 52.5 | 53.0 | 52.0 | 51.0 | 50.0 | 49.0 |
As can be seen from the figure, the present invention can meet the design requirements HRC45-55 of workpiece.
Embodiment 17
A kind of sprocket tooth part salt bath furnace quenching method, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 70kg, KCl be 30kg, Heating temperature is 900 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, sprocket wheel material is 42CrMo, sprocket wheel transverse tooth thickness 49mm, the long 70mm of tooth, and salt bath heating temperature is 920 DEG C, presses sprocket wheel transverse tooth thickness 28S/mm × 49mm setting heat-up time;
(3), after heating and thermal insulation completes, utilize quenchant to quench fast, quenchant is quick cooling oil;
(4) put into well formula tempering stove tempering insulation after drying, tempering temperature is 230 DEG C, and tempering insulation time is 4 hours, soaking time to after to come out of the stove air cooling.
Following table be the data that detect of the sprocket wheel made in the present embodiment as following table:
| Depth of hardening zone/mm | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Sprocket wheel hardness/HRC | 53.3 | 53.2 | 53 | 52.5 | 52 | 51.4 | 50.5 | 50.1 |
As can be seen from the figure, the present invention can meet the design requirements HRC45-55 of workpiece.
Depth of hardening zone of the present invention can reach more than 12mm, and can obtain the quench-hardened case of different depths heat-up time by adjustment salt bath furnace.The present invention adopts salt bath furnace quenching technology, rate of heating is fast, simultaneously workpiece not easily oxidation and decarbonization, Heating temperature evenly, easy temperature control system, easy to operate etc., avoid sprocket tooth part surface due to the uneven and rather of quenching of Heating temperature, make each depth of hardening zone after sprocket tooth part hard surfacing identical and in the uniformity of hardness difference of whole quench-hardened case within HRC5, obtain the surface hardness of sprocket tooth part of high-quality, steady quality, reliable, improve the work-ing life of sprocket wheel.
Claims (4)
1. a sprocket tooth part salt bath furnace quenching method, described sprocket wheel is the sprocket wheel of scraper conveyer and first conveyer of digging machine, and sprocket wheel material is 42CrMo, comprises the following steps:
(1), will containing BaCl
2put into thermohaline liquid furnace with KCl mixture to heat, wherein BaCl
2weight part be the weight part of 65 ~ 75, KCl be 25 ~ 35, BaCl
2weight part add that the weight part of KCl is 100, Heating temperature is 720 ~ 940 DEG C, and mixture is melted completely, and the mixture of thawing is the liquation of salt bath;
(2), by sprocket tooth part put into salt bath to heat, salt bath heating temperature is 900 ~ 920 DEG C, presses sprocket wheel transverse tooth thickness 26 ~ 30s/mm heat-up time and sets;
(3), after heating and thermal insulation completes, quenchant is utilized to quench fast;
(4) quenching carries out tempering insulation after terminating again, and tempering insulation time is 3.5-4.5 hour, soaking time to after to come out of the stove air cooling;
Described quenchant is cooling oil, and tempering temperature is 220 ~ 240 DEG C, or described quenchant is water and oily double quenching, and tempering temperature is 220 ~ 260 DEG C.
2. sprocket tooth part salt bath furnace quenching method according to claim 1, is characterized in that: described mixture is containing BaCl
2be 7:3 with the weight ratio of KCl.
3. sprocket tooth part salt bath furnace quenching method according to claim 1, is characterized in that: the described salt bath heating time sets by sprocket wheel transverse tooth thickness 28s/mm.
4. sprocket tooth part salt bath furnace quenching method according to claim 1, is characterized in that: described tempering insulation time is 4 hours.
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| CN201210467444.7A CN103820624B (en) | 2012-11-19 | 2012-11-19 | Salt-bath furnace quenching method for teeth of chain wheel |
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| CN104532166B (en) * | 2014-12-27 | 2016-05-04 | 北京金恒博远冶金技术发展有限公司 | A kind of preparation method of wear-resistant gear |
| CN104846157B (en) * | 2015-03-31 | 2017-02-01 | 常州天山重工机械有限公司 | Tempering technology for high-precision high-speed heavy-duty gear salt bath quenching |
| CN107877106A (en) * | 2017-11-14 | 2018-04-06 | 北京大圣格尔冶金设备有限公司 | A kind of processing technology of pushing gear tooth |
| CN108220578A (en) * | 2017-12-22 | 2018-06-29 | 常州天山重工机械有限公司 | The judgment method of large-scale 18CrNiMo7-6 gear wheel carburizations part salt bath quenching time |
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| CN101153376A (en) * | 2006-09-26 | 2008-04-02 | 宝山钢铁股份有限公司 | Method for manufacturing high-vanadium, high-cobalt high speed steel |
| CN101191230A (en) * | 2007-11-27 | 2008-06-04 | 李明 | Surface treatment technique for coal winning machine cutting bit |
| CN102071301A (en) * | 2011-02-24 | 2011-05-25 | 江苏太平洋精锻科技股份有限公司 | Ultra-deep hardness lowering method for effective hardened layer of gear with shallow carburized layer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153376A (en) * | 2006-09-26 | 2008-04-02 | 宝山钢铁股份有限公司 | Method for manufacturing high-vanadium, high-cobalt high speed steel |
| CN101191230A (en) * | 2007-11-27 | 2008-06-04 | 李明 | Surface treatment technique for coal winning machine cutting bit |
| CN102071301A (en) * | 2011-02-24 | 2011-05-25 | 江苏太平洋精锻科技股份有限公司 | Ultra-deep hardness lowering method for effective hardened layer of gear with shallow carburized layer |
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