CN102828100A - Heat treatment method for ultralow manganese grinding ball or grinding segment - Google Patents
Heat treatment method for ultralow manganese grinding ball or grinding segment Download PDFInfo
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- CN102828100A CN102828100A CN 201210284396 CN201210284396A CN102828100A CN 102828100 A CN102828100 A CN 102828100A CN 201210284396 CN201210284396 CN 201210284396 CN 201210284396 A CN201210284396 A CN 201210284396A CN 102828100 A CN102828100 A CN 102828100A
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Abstract
The invention relates to a heat treatment method for an ultralow manganese grinding ball or grinding segment, which belongs to the technical field of wear resistant materials. The method comprises the following steps: 1, heating a semi-finished product of the ultralow manganese grinding ball or grinding segment in a heat treatment furnace and then quenching the semi-finished product in an oil material; and 2, taking the semi-finished product out from the oil material after quenching, cooling the semi-finished product, then heating the semi-finished product in a tempering furnace and carrying out cooling so as to obtain a finished product. The ultralow manganese grinding ball or grinding segment comprises the following chemical components expressed in mass percentage: 2.2 to 3.0% of C, 0.4 to 0.8% of Si, 10 to 10.5% of Cr, 0.1 to 0.25% of Mn, 1 to 4% of Sc, no more than 0.005% of S and no more than 0.005% of P, with the balance being Fe. Treated by the method provided by the invention, the finished product of the ultralow manganese grinding ball or grinding segment has hardness of no less than 58 HRC and impact toughness of no less than 2.5 J, and the purposes of saving the manganese resource and greatly reducing production cost are achieved.
Description
Technical field
The present invention designs a kind of heat treating method of high-abrasive material technical field, is specifically related to the heat treating method of a kind of ultralow manganese abrading-ball or mill section.
Background technology
Alloy casting grinding ball is widely used in building materials, industries such as mine, electric power to be higher than forged wear resisting property.Abrading-ball, section have casting iron ball, section and forged steel ball.Cast iron ball mainly contains Chrome metal powder spoken parts in traditional operas cast iron casting ball and alloy nodular cast iron ball at present.The chrome alloy cast iron ball generally adopts the circuit melting, swage or sand casting, and through normalizing, quenching and temper, its chromium content is 1.5-18%, also contains elements such as molybdenum, copper, its metallographic founder (of a school of learning) is mainly perlite.Alloy nodular cast iron generally adopts cupola melting, swage or sand casting, and through isothermal processes, metallographic structure is bainite or bainite-Ma Beishi.The chemical carbon containing two of these alloy casting grinding balls is generally 0.7-1%, and the manganese content that generally uses is 0.6-0.8% or 0.65-0.95%, chromium content≤0.65, and what have also contains vanadium metal.Handle now the complex process of ultralow manganese abrading-ball or mill section in the technology, cost is higher, and hardness and impelling strength are lower.
Summary of the invention
The objective of the invention is to overcome the complex process of ultralow manganese abrading-ball in the prior art or mill section, cost is higher, and hardness and the lower technical problem of impelling strength.
Technical scheme of the present invention is: the heat treating method of a kind of ultralow manganese abrading-ball or mill section may further comprise the steps: step 1, ultralow manganese abrading-ball of work in-process or mill section are put into the heat treatment furnace internal heating, and put into oil plant then and quench;
Step 2 picks up work in-process after quenching in oil plant, after cooling, put into tempering stove and heat, and cooling afterwards obtains finished product;
The Chemical Composition and the mass percent of said ultralow manganese abrading-ball or mill section are: C:2.2～3.0%, Si:0.4～0.8%, Cr:10～10.5%, Mn:0.1～0.25%, Sc:1～4%, S≤0.005%, P≤0.005%, surplus are Fe.
In the step 1, said thermal treatment process is specially: be heated to 500 ℃, be incubated 110 minutes, be heated to 750 ℃ afterwards, be incubated 120 minutes, be heated to 940 ℃ at last, be incubated 135 minutes.
In the step 1, the said oil plant of putting into carries out quenching technology and is specially: it is that 55-65 ℃ of oil plant soaked 1-6 minute that work in-process are put into the oil plant initial temperature,
Described oil plant is a k1489 type isothermal hierarchical quenching oil.
Said oil plant initial temperature is preferably 60 ℃.
In the step 2, said when putting into tempering stove half-finished temperature be 115-135 ℃.
In the step 2, said tempering process is specially: be heated to 395-405 ℃, be incubated 5.5 hours.
In the step 2, said continuation process for cooling is specially: earlier work in-process are put into burial pit and naturally cool to 100 ℃ once, be cooled to room temperature then in the working area fully.
The hardness of said ultralow manganese abrading-ball or mill section can reach >=58HRC, and impelling strength is >=2.5 joules.
The beneficial effect that the present invention had: after method processing of the present invention; Ultralow manganese abrading-ball of the finished product that obtains or mill section hardness can reach >=58HRC, and impelling strength is >=2.5 joules, thereby realize practicing thrift the ferromanganese resource; Reduce production costs significantly, have huge economic benefit.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with preferred embodiment; Embodiment, method, step and performance thereof to the heat-stable material frame of the novel low-chromium cast-iron that proposes according to the present invention specify as follows:
Embodiment 1:
The Chemical Composition and the mass percent of ultralow manganese abrading-ball of present embodiment or mill section are: C:2.2%, Si:0.5%, Cr:10.5%, Mn:0.15%, Sc:1%, S:0.002%, P:0.001%, surplus is Fe.
Its preparation method comprises the steps:
Step 1, with ultralow manganese abrading-ball of work in-process or mill section heat release heat treatment furnace, intensification is carried out, and puts into oil plant afterwards and quenches:
Get ultralow manganese abrading-ball of work in-process or mill section, pack in the metal screen frame, put into heat treatment furnace, be heated to 500 ℃, be incubated 110 minutes, be heated to 750 ℃ afterwards, be incubated 120 minutes, be heated to 940 ℃ at last, be incubated 135 minutes; Afterwards, it is that 55 ℃ oil plant quenches that whole frame work in-process are put into ready oil plant initial temperature, and the cool time is according to the direct size decision of abrading-ball or mill section, concrete visible table 2; Said oil plant is: k1498 type isothermal hierarchical quenching oil.
Table 2
| Specification | Go into oil (quenching) time (min) |
| Φ100 | ?6 |
| Φ90 | ?6 |
| Φ80 | ?5 |
| Φ70 | ?5.5 |
| Φ60 | ?4 |
| Φ50 | ?4 |
| Φ40 | ?3 |
| Φ30-25 | ?2 |
| Φ25 | ?1 |
| Φ20 | ?1 |
| Φ15-17.5 | ?1 |
| 18 sections of Φ 12-Φ | ?1 |
| 30 sections of Φ 20-Φ | ?2 |
| 50 sections of Φ 35-Φ | ?3 |
| ?＞Φ60 | 4 |
Step 2 picks up work in-process after quenching in oil plant, put into tempering stove after the cooling, heating, continue afterwards to cool off finished product:
After quenching work in-process are picked up in oil plant, drop oil is put into tempering stove when being cooled to 115 ℃; Be heated to 395 ℃; Constant temperature kept 5.5 hours afterwards, earlier work in-process was put into burial pit then and naturally cooled to below 100 ℃, was cooled to room temperature then fully in the working area.
The implementation result of present embodiment: after handling through the method for present embodiment, ultralow manganese abrading-ball of the finished product that obtains or mill section hardness can reach 58HRC, and impelling strength is 2.5 joules, thereby realizes practicing thrift the ferromanganese resource, has reduced production cost significantly.
Embodiment 2
The Chemical Composition and the mass percent of ultralow manganese abrading-ball of present embodiment or mill section are: C:2.5%, Si:0.6%, Cr:10.2%, Mn:0.25%, Sc:1.5%, surplus is Fe.
Its preparation method comprises the steps:
Step 1, with ultralow manganese abrading-ball of work in-process or mill section heat release heat treatment furnace, intensification is carried out, and puts into oil plant afterwards and quenches;
Get ultralow manganese abrading-ball of work in-process or mill section, pack in the metal screen frame, put into heat treatment furnace, be heated to 500 ℃, be incubated 110 minutes, be heated to 750 ℃ afterwards, be incubated 120 minutes, be heated to 940 ℃ at last, be incubated 135 minutes; Afterwards, it is that 60 ℃ oil plant quenches that whole frame work in-process are put into ready oil plant initial temperature, and the cool time is according to the direct size decision of abrading-ball or mill section, concrete visible table 2 (with embodiment 1); Said oil plant is: k1498 type isothermal hierarchical quenching oil.
Step 2 picks up work in-process after quenching in oil plant, put into tempering stove after the cooling, heating, continue afterwards to cool off finished product.
After quenching work in-process are picked up in oil plant, drop oil is put into tempering stove when being cooled to 125 ℃; Be heated to 400 ℃; Constant temperature kept 5.5 hours afterwards, earlier work in-process was put into burial pit then and naturally cooled to below 100 ℃, was cooled to room temperature then fully in the working area.
The implementation result of present embodiment: after handling through the method for present embodiment, ultralow manganese abrading-ball of the finished product that obtains or mill section hardness can reach 60HRC, and impelling strength is 2.8 joules, thereby realizes practicing thrift the ferromanganese resource, has reduced production cost significantly.
Embodiment 3
The Chemical Composition and the mass percent of ultralow manganese abrading-ball of present embodiment or mill section are: C:2.6%, Si:0.7%, Cr:10.1%, Mn:0.2%, Sc:2%, S:0.004%, P:0.002%, surplus is Fe.
Its preparation method comprises the steps:
Step 1, with ultralow manganese abrading-ball of work in-process or mill section heat release heat treatment furnace, intensification is carried out, and puts into oil plant afterwards and quenches;
Get ultralow manganese abrading-ball of work in-process or mill section, pack in the metal screen frame, put into heat treatment furnace, be heated to 500 ℃, be incubated 110 minutes, be heated to 750 ℃ afterwards, be incubated 120 minutes, be heated to 940 ℃ at last, be incubated 135 minutes; Afterwards, it is that 65 ℃ oil plant quenches that whole frame work in-process are put into ready oil plant initial temperature, and the cool time is according to the direct size decision of abrading-ball or mill section, concrete visible table 2 (with embodiment 1); Said oil plant is: k1498 type isothermal hierarchical quenching oil.
Step 2 picks up work in-process after quenching in oil plant, put into tempering stove after the cooling, heating, continue afterwards to cool off finished product.
After quenching work in-process are picked up in oil plant, drop oil is put into tempering stove when being cooled to 135 ℃; Be heated to 405 ℃; Constant temperature kept 5.5 hours afterwards, earlier work in-process was put into burial pit then and naturally cooled to below 100 ℃, was cooled to room temperature then fully in the working area.
The implementation result of present embodiment: after handling through the method for present embodiment, ultralow manganese abrading-ball of the finished product that obtains or mill section hardness can reach 62HRC, and impelling strength is 2.6 joules, thereby realizes practicing thrift the ferromanganese resource, has reduced production cost significantly.
Above-mentioned enforcement provides to the personnel in the familiar field and realizes or use of the present invention; Being familiar with those skilled in the art can be under the situation that does not break away from thought of the present invention; The foregoing description is made various modifications or variation; Therefore protection scope of the present invention is not limit by the foregoing description, and should be the maximum range that meets the inventive features that claims mention.
Claims (8)
1. the heat treating method of ultralow manganese abrading-ball or mill section may further comprise the steps:
Step 1 is put into the heat treatment furnace internal heating with ultralow manganese abrading-ball of work in-process or mill section, puts into oil plant then and quenches;
Step 2 picks up work in-process after quenching in oil plant, after cooling, put into tempering stove and heat, and cooling afterwards obtains finished product;
The Chemical Composition and the mass percent of said ultralow manganese abrading-ball or mill section are: C:2.2～3.0%, Si:0.4～0.8%, Cr:10～10.5%, Mn:0.1～0.25%, Sc:1～4%, S≤0.005%, P≤0.005%, surplus are Fe.
2. the heat treating method of ultralow manganese abrading-ball according to claim 1 or mill section, it is characterized in that: in the step 1, said thermal treatment process is specially: be heated to 500 ℃; Be incubated 110 minutes, be heated to 750 ℃ afterwards, be incubated 120 minutes; Be heated to 940 ℃ at last, be incubated 135 minutes.
3. the heat treating method of ultralow manganese abrading-ball according to claim 1 or mill section is characterized in that: in the step 1, the said oil plant of putting into carries out quenching technology and is specially: it is that 55-65 ℃ of oil plant soaked 1-6 minute that work in-process are put into the oil plant initial temperature.
4. the heat treating method of ultralow manganese abrading-ball according to claim 3 or mill section, it is characterized in that: described oil plant is a k1489 type isothermal hierarchical quenching oil.
5. the heat treating method of ultralow manganese abrading-ball according to claim 3 or mill section, it is characterized in that: said oil plant initial temperature is preferably 60 ℃.
6. the heat treating method of ultralow manganese abrading-ball according to claim 1 or mill section is characterized in that, in the step 2, said when putting into tempering stove half-finished temperature be 115-135 ℃.
7. the heat treating method of ultralow manganese abrading-ball according to claim 1 or mill section is characterized in that in the step 2, said tempering process is specially: be heated to 395-405 ℃, be incubated 5.5 hours.
8. the heat treating method of ultralow manganese abrading-ball according to claim 1 or mill section; It is characterized in that; In the step 2, said continuation process for cooling is specially: earlier work in-process are put into burial pit and naturally cool to 100 ℃ once, be cooled to room temperature then in the working area fully.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710613A (en) * | 2013-09-25 | 2014-04-09 | 宁国市正兴耐磨材料有限公司 | High chromium alloy wear-resistance steel ball |
| CN104087887A (en) * | 2014-06-17 | 2014-10-08 | 宁国东方碾磨材料股份有限公司 | High-hardness coating grinding segment |
| CN107312923A (en) * | 2017-07-15 | 2017-11-03 | 芜湖乾凯材料科技有限公司 | A kind of high crush load steel ball and its processing method |
-
2012
- 2012-08-13 CN CN 201210284396 patent/CN102828100A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710613A (en) * | 2013-09-25 | 2014-04-09 | 宁国市正兴耐磨材料有限公司 | High chromium alloy wear-resistance steel ball |
| CN104087887A (en) * | 2014-06-17 | 2014-10-08 | 宁国东方碾磨材料股份有限公司 | High-hardness coating grinding segment |
| CN104087887B (en) * | 2014-06-17 | 2016-09-07 | 宁国东方碾磨材料股份有限公司 | A kind of high hardness spray coating mill section |
| CN107312923A (en) * | 2017-07-15 | 2017-11-03 | 芜湖乾凯材料科技有限公司 | A kind of high crush load steel ball and its processing method |
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Application publication date: 20121219 |