CN104259360B - Heating technique before the forging of Cr9SiMn bearing steel - Google Patents
Heating technique before the forging of Cr9SiMn bearing steel Download PDFInfo
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- CN104259360B CN104259360B CN201410364234.4A CN201410364234A CN104259360B CN 104259360 B CN104259360 B CN 104259360B CN 201410364234 A CN201410364234 A CN 201410364234A CN 104259360 B CN104259360 B CN 104259360B
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Abstract
The invention discloses heating technique before a kind of Cr9SiMn bearing steel forging, comprise the following steps: first putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；Open vibrator, be transferred to peak frequency；Then it is heated to 170 180 DEG C with the speed of 50 60 DEG C/h, is incubated 23 hours；It is heated to 770 790 DEG C with the speed of 60 80 DEG C/h, after being incubated 36 hours, closes vibrator；Steel ingot is heated to 1,200 1220 DEG C with the speed of 100 120 DEG C/h, after being incubated 28 hours, heating terminates, rapidly enter the forging stage, the present invention by zone heating, control temperature retention time, the method for programming rate, be possible to prevent the internal burning of steel ingot, temperature distributing disproportionation is even and the phenomenons such as coarse-grain occurs, internal stress and the fragility of steel ingot is eliminated by heating and vibrator vibrations, avoid, during forging, crack performance occurring, it is ensured that product quality.
Description
Technical field
The processing method that the invention belongs to forging, is specifically related to heating technique before the forging of Cr9SiMn bearing steel.
Background technology
Cr9SiMn bearing steel is a kind of special steel of processing bearing, there is high comprcssive strength and fatigue limit, high rigidity, high-wearing feature and certain toughness, quenching degree is good, sulfur and phosphorus are controlled the tightest, it it is a kind of high-duty cast steel, also mould steel can be done, need steel ingot is heated before the forging of Cr9SiMn bearing steel, then carry out forging and heat treatment and polish, in heating process, owing to heating technique is unreasonable, cause the internal burning of steel ingot, internal stress is high, temperature distributing disproportionation is even and the phenomenons such as coarse-grain occurs, make during follow-up forging, the phenomenons such as be full of cracks often occur, have a strong impact on and forge quality.
Summary of the invention
For solving the problems referred to above, the invention discloses heating technique before a kind of Cr9SiMn bearing steel forging, be possible to prevent the internal burning of steel ingot, temperature distributing disproportionation even and the phenomenons such as coarse-grain, the internal stress of reduction steel ingot and fragility occur, in order to avoid during forging, crack performance occurring.
For reaching above-mentioned purpose, technical scheme is as follows:
Heating technique before a kind of Cr9SiMn bearing steel forging, it is characterised in that: comprise the following steps:
(1) putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；
(2) open vibrator, be transferred to peak frequency；
(3) Cr9SiMn bearing steel steel ingot is heated to 170-180 DEG C with the speed of 50-60 DEG C/h, is incubated 2-3 hour；
(4) Cr9SiMn bearing steel steel ingot is heated to 770-790 DEG C with the speed of 60-80 DEG C/h, is incubated 3-6 hour；
(5) vibrator is closed；
(6) with the speed of 100-120 DEG C/h, Cr9SiMn bearing steel steel ingot being heated to 1200-1220 DEG C, after being incubated 2-8 hour, heating terminates, and rapidly enters the forging stage.
The invention has the beneficial effects as follows:
Heating technique before a kind of Cr9SiMn bearing steel forging of the present invention, by zone heating, control temperature retention time, the method for programming rate, be possible to prevent the internal burning of steel ingot, temperature distributing disproportionation is even and the phenomenons such as coarse-grain occurs, steel ingot described in step (3) is heated slowly to 170-180 DEG C, it is incubated 2-3 hour, it it is the internal stress being reduced steel ingot by heating, vibrator is used in heating process, it is internal stress and the fragility being eliminated steel ingot by mechanical means, double insurance is avoided during forging, crack performance there is, it is ensured that product quality.
Detailed description of the invention
Embodiment 1
The round steel that Cr9SiMn bearing steel is diameter 80cm described in the present embodiment.
Heating technique before a kind of Cr9SiMn bearing steel forging, comprises the following steps:
(1) putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；
(2) open vibrator, be transferred to peak frequency；
(3) Cr9SiMn bearing steel steel ingot is heated to 180 DEG C with the speed of 50 DEG C/h, is incubated 2 hours；
(4) Cr9SiMn bearing steel steel ingot is heated to 780 DEG C with the speed of 70 DEG C/h, is incubated 4 hours；
(5) vibrator is closed；
(6) with the speed of 115 DEG C/h, Cr9SiMn bearing steel steel ingot being heated to 1210 DEG C, after being incubated 6 hours, heating terminates, and rapidly enters the forging stage.
Embodiment 2
The square steel that Cr9SiMn bearing steel is 100x100 described in the present embodiment.
Heating technique before a kind of Cr9SiMn bearing steel forging, comprises the following steps:
(1) putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；
(2) open vibrator, be transferred to peak frequency；
(3) Cr9SiMn bearing steel steel ingot is heated to 175 DEG C with the speed of 60 DEG C/h, is incubated 3 hours；
(4) Cr9SiMn bearing steel steel ingot is heated to 780 DEG C with the speed of 80 DEG C/h, is incubated 6 hours；
(5) vibrator is closed；
(6) with the speed of 115 DEG C/h, Cr9SiMn bearing steel steel ingot being heated to 1220 DEG C, after being incubated 8 hours, heating terminates, and rapidly enters the forging stage.
Embodiment 3
The band steel that Cr9SiMn bearing steel is 80x50 described in the present embodiment.
Heating technique before a kind of Cr9SiMn bearing steel forging, comprises the following steps:
(1) putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；
(2) open vibrator, be transferred to peak frequency；
(3) Cr9SiMn bearing steel steel ingot is heated to 180 DEG C with the speed of 50 DEG C/h, is incubated 2.5 hours；
(4) Cr9SiMn bearing steel steel ingot is heated to 775 DEG C with the speed of 60 DEG C/h, is incubated 5 hours；
(5) vibrator is closed；
(6) with the speed of 120 DEG C/h, Cr9SiMn bearing steel steel ingot being heated to 1220 DEG C, after being incubated 5 hours, heating terminates, and rapidly enters the forging stage.
Heating technique before Cr9SiMn bearing steel of the present invention forging, by zone heating, control temperature retention time, the method for programming rate, be possible to prevent the internal burning of steel ingot, temperature distributing disproportionation is even and the phenomenons such as coarse-grain occurs, internal stress and the fragility of steel ingot is eliminated by heating and vibrator vibrations, avoid during forging, crack performance there is, it is ensured that product quality.
Claims (1)
1. heating technique before a Cr9SiMn bearing steel forging, it is characterised in that: comprise the following steps:
(1) putting on the dividing plate of intermediate frequency furnace by Cr9SiMn bearing steel steel ingot, the dividing plate back side is fixed with vibrator；
(2) open vibrator, be transferred to peak frequency；
(3) Cr9SiMn bearing steel steel ingot is heated to 170-180 DEG C with the speed of 50-60 DEG C/h, is incubated 2-3 hour；
(4) Cr9SiMn bearing steel steel ingot is heated to 770-790 DEG C with the speed of 60-80 DEG C/h, is incubated 3-6 hour；
(5) vibrator is closed；
(6) with the speed of 100-120 DEG C/h, Cr9SiMn bearing steel steel ingot being heated to 1200-1220 DEG C, after being incubated 2-8 hour, heating terminates, and rapidly enters the forging stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410364234.4A CN104259360B (en) | 2014-07-29 | 2014-07-29 | Heating technique before the forging of Cr9SiMn bearing steel |
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| CN201410364234.4A CN104259360B (en) | 2014-07-29 | 2014-07-29 | Heating technique before the forging of Cr9SiMn bearing steel |
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| CN104259360A CN104259360A (en) | 2015-01-07 |
| CN104259360B true CN104259360B (en) | 2016-09-07 |
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| CN108193039A (en) * | 2018-02-11 | 2018-06-22 | 湖南耐特材料科技有限公司 | A kind of annealing device for being used for plank and bar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS56489B2 (en) * | 1974-05-07 | 1981-01-08 | ||
| JPS606235A (en) * | 1983-06-24 | 1985-01-12 | Nippon Steel Corp | Hot forging method of mechanical parts |
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Crl2MoV steel forging method |
| CN101912935B (en) * | 2010-08-20 | 2011-10-19 | 张家港市广大机械锻造有限公司 | Heating method for forging based on P20+Ni die steel |
| CN102441628A (en) * | 2010-10-11 | 2012-05-09 | 上海腾辉锻造有限公司 | Forging heating method for forge piece sealing ring |
| CN101979678B (en) * | 2010-11-01 | 2013-03-13 | 北京航空航天大学 | Method for homogenizing residual stress through vibration positioning |
| CN102352474B (en) * | 2011-10-31 | 2013-02-13 | 哈尔滨中飞新技术股份有限公司 | Forging and heat treatment method of 2A50 aluminium alloy die forging |
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Address after: 215614 Anqing Village, Fenghuang Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: Zhangjiagang general Limited by Share Ltd Address before: 215614 Anqing Village, Fenghuang Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: Zhangjiagang City Guangda Machinery Forging Co., Ltd. |
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