CN103320709B - Cold working die steel material and alloy inoculant - Google Patents
Cold working die steel material and alloy inoculant Download PDFInfo
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- CN103320709B CN103320709B CN201310205472.6A CN201310205472A CN103320709B CN 103320709 B CN103320709 B CN 103320709B CN 201310205472 A CN201310205472 A CN 201310205472A CN 103320709 B CN103320709 B CN 103320709B
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Abstract
The present invention relates to a kind of cold working die steel material and alloy inoculant.A kind of cold working die steel material, is characterized in that, also comprise following element in material except Fe, by weight percentage: C? 1.55 ~ 1.75%, Cr? 11.50 ~ 12.50%, V? 0.20 ~ 0.30%, Mo? 0.45 ~ 0.55%, Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element weight percent sum is 100%.Compared with prior art, cold working die steel material of the present invention can be applicable to casting, adds the performance that alloy inoculant can improve cold working die steel material.Make cold working die module by casting technique, save energy and reduce the waste of material, the production cycle also shortens greatly.
Description
Technical field
The present invention relates to cold-work die steel, more particularly, relate to a kind of cold working die steel material and alloy inoculant.
Background technology
Existing cold-work die steel cannot be applied to casting, or cast the performance existing defects of the foundry goods obtained, therefore traditional cold-work die is raw-material changes forging many employings break-in forging method, main forging process is: jumping-up-pulling-jumping-up, and its shortcoming existed is: forging process process is complicated, and cost is high, the efficiency of processing is low, and forging module is simple square or right cylinder, differs comparatively large with the true form of cold working die module, need to carry out machining again.In machining process after forging, amount of machining is large, can cause the waste of lot of materials and the energy.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of cold working die steel material and the alloy inoculant that are applicable to casting.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of cold working die steel material, except Fe, also comprise following element, by weight percentage: C1.55 ~ 1.75%, Cr11.50 ~ 12.50%, V0.20 ~ 0.30%, Mo0.45 ~ 0.55%, Si is not more than 0.25%, Mn is not more than 0.20%, S and is not more than 0.030%, P and is not more than 0.030%, Ni is not more than 0.15%, it is surplus that Cu is not more than 0.2%, Fe, and each element weight percent sum is 100%.
In cold working die steel material of the present invention, in material, except Fe, also comprise following element, by weight percentage: C1.72%, Cr12.03%, V0.25%, Mo0.50%, Si is not more than 0.25%, Mn is not more than 0.20%, S and is not more than 0.030%, P and is not more than 0.030%, Ni is not more than 0.15%, it is surplus that Cu is not more than 0.2%, Fe, and each element weight percent sum is 100%.
Present invention also offers a kind of alloy inoculant being applicable to above-mentioned cold working die steel material, except Fe, following element is also comprised in alterant, by weight percentage: RE14.0 ~ 20.5%, Mg3.0 ~ 4.5%, Si25 ~ 30%, Mn3.0 ~ 4.0%, Ca3.0 ~ 5.0%, Ti1.5 ~ 2.5%, Fe is surplus, and each element weight percent sum is 100%.
In alloy inoculant of the present invention, also comprise following element in alterant except Fe, by weight percentage: RE18.2%, Mg4.1%, Si26.5%, Mn3.0%, Ca3.5%, Ti2.1%, Fe are surplus, each element weight percent sum is 100%.
Implement cold working die module castmethod of the present invention, there is following beneficial effect:
1, cold working die steel material of the present invention still has good performance after casting, has higher hardness and impelling strength, can meet the user demand of cold working die module.Make cold working die module by casting technique, the amount of machining of mould greatly reduces, and while guarantee cold-work die performance, save energy and reduce the waste of material, the production cycle also shortens greatly.
2, alloy inoculant of the present invention can join in cold working die steel material, alloy inoculant is little on linear shrinkage ratio impact, alterant can make foundry goods obtain reasonable metallographic structure, crystal grain thinning and improve hardness value and impelling strength, improve mobility and the solidifiability of molten steel, improve the component segregation of foundry goods and the cavity filling energy of molten steel, make alloying elements distribution in foundry goods evenly, reduce the surfaceness of foundry goods.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of cold working die module;
Fig. 2 is the structural representation of rising head;
Fig. 3 is the front view of rising head;
Fig. 4 is the vertical view of rising head.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Except Fe, following element is also comprised in cold working die steel material of the present invention, by weight percentage: C1.55 ~ 1.75%, Cr11.50 ~ 12.50%, V0.20 ~ 0.30%, Mo0.45 ~ 0.55%, Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu and is not more than 0.2%, Fe is surplus, and each element weight percent sum is 100%.In a preferred embodiment of the invention, C1.72%, Cr12.03%, V0.25%, Mo0.50%, Si is not more than 0.25%, Mn and is not more than 0.20%, S and is not more than 0.030%, P and is not more than 0.030%, Ni is not more than 0.15%, Cu, and to be not more than 0.2%, Fe be surplus, and each element weight percent sum is 100%.
Present invention also offers a kind of alloy inoculant for adding in aforesaid cold working die steel material, for improving the performance of material.Except Fe, also comprise following element in alloy inoculant, by weight percentage: RE14.0 ~ 20.5%, Mg3.0 ~ 4.5%, Si25 ~ 30%, Mn3.0 ~ 4.0%, Ca3.0 ~ 5.0%, Ti1.5 ~ 2.5%, Fe is surplus, and each element weight percent sum is 100%.The quality of the alterant added is 0.15 ~ 0.45% of the quality of cold working die steel material.In a preferred embodiment of the invention, RE18.2%, Mg4.1%, Si26.5%, Mn3.0%, Ca3.5%, Ti2.1%, Fe is surplus, and each element weight percent sum is 100%.The quality of the alterant added is 0.4% of the quality of cold working die steel material.
Cold working die steel material of the present invention comprises the following steps when being applied to cold working die module casting:
S1, melting cold-work die steel molten steel; Medium frequency induction melting furnace is selected to melt molten steel, with magnesia as furnace lining material, at burner hearth, a cylinder module is placed by central authorities, the power of ruhmkorff coil is first added to 10KW after accomplishing fluently by furnace lining, baking furnace lining, insulation 6h, until the magnesia around the cylindrical module of centre is fully sintered, till becoming fragile in black (this process is roaster lining material).Cylindrical module in the middle of taking out, puts into the above-mentioned cold working die steel material getting out treat melting; By heater coil power selection to 30KW, keep test block in a hour to melt completely, obtain molten steel.
S2, in molten steel, add above-mentioned alloy inoculant (rare earth alloy alterant), obtain the molten steel adding alterant, the quality of the alterant added is 0.15 ~ 0.45% of the quality of molten steel.
The temperature of molten steel is measured with infrared thermometer, when reaching 1550 DEG C, insert aluminium tapping (adding the effect of rare earth and slotting aluminium during tapping: final deoxygenation and the object bred), adopt wire feeding process rare earth alloy to carry out Metamorphism treatment (adopting wire feeding process to add alterant).The inner core of the silk adopted in wire feeding process is rare earth alloy alterant, outside coated Low Carbon Steel Pipe and the aluminum pipe successively of inner core.The wall thickness of Low Carbon Steel Pipe is 0.2 ~ 2.5mm, and tapping temperature is higher or amount is larger, and tube wall is thicker; The wall thickness of aluminum pipe is 0.5 ~ 3.0mm, and wall thickness weighs 0.3 ~ 0.6Kg according to molten steel aluminum pipe per ton and makes.The techniques such as deoxidation, purification of molten steel, impurity modification, microalloy treatment complete by wire feeding process one step.
S3; evaporative pattern foam block is manufactured according to the size of cold working die module; foam type surface is evenly coated in after zircon flour coating is water-soluble; be heated to the moisture content in 60 DEG C of insulations, 1 hour oven dry coating in an oven; be coated with a coating again to dry, three times until foam surface ties the zirconium English powder protective layer of one deck densification completely repeatedly.
Then will the foam block of zirconium English powder protective layer be had to imbed sandbox.The shape of cold working die module (selects one of insert of the assembled piece type sheet-metal press working mould in certain automobile production to be example) as shown in Figure 1.
Cast module (having the foam block of zirconium English powder protective layer) is placed vertically downward according to foundry goods working face; dead head is arranged on the top of cast module; as far as possible near the triangle stiffening web position of cast module; through Integrated comparative, the difference of dead head position is distributed with certain influence to defect in cast module.Dead head is arranged on the distribution of fixed face root formation Shrinkage cavity and area is minimum, minimum number, therefore the optimum position of rising head is fixed face root.Increasing the size of dead head, not helping reducing final set liquidus line district in foundry goods; Dead head undersized, can make foundry goods produce too much shrinkage cavity, little on the impact of foundry goods internal porosity; The height of increase dead head can only increase the shrinkage cavity in dead head.In the present embodiment, dead head size L × B × H is 110 × 85 × 80mm, as shown in figs 2-4.
S4, cast adds the molten steel of alterant; The liquidus temperature of cold-work die steel of the present invention is 1482 DEG C, if teeming temperature is lower than material liquid phase temperature of solidification, can affect the mold filling and solidification processes of foundry goods, and choosing teeming temperature is 1500 DEG C of situations of observing shrinkage cavity and porosity.Through Integrated comparative, along with the rising of teeming temperature, the filling time of foundry goods and the volume change of foundry goods internal porosity little, and shrinkage cavity becomes many, the setting time of foundry goods also extends, and continues to improve the waste that teeming temperature can cause the energy, and therefore best casting pouring temperature is 1500 DEG C.
S5, takes out cold working die module foundry goods, and heat-treats.Foundry goods is SG2-5-12 in model, rated output 5KW, temperature rating is carry out isothermal annealed processes in the well formula heat treatment furnace of 1200 DEG C: in well formula heat treatment furnace, be heated to 870 DEG C, is the temperature controller thermocouple measuring temperature of KSW-6D-16 by model, insulation 3h; Slow cooling, to 740 DEG C, is incubated 3h; Furnace cooling is come out of the stove after 500 DEG C, and speed of cooling is less than 30 DEG C/h.Carry out middle temperature quenching technology again: be heated to 840 DEG C, insulation 30min, continues to be warmed up to 1040 DEG C, and insulation 20min, takes out oil quenching.Finally carry out low-temperaturetempering technique: in well formula heat treatment furnace, be heated to 200 DEG C, air cooling after insulation 2h, obtains cold working die module.
The hardness of the cold working die module obtained by above-mentioned steps is 62HRC, and ultimate compression strength is 5100Mpa, and bending strength is 4000Mpa, can meet the user demand of cold-work die.
In another preferred embodiment of the invention, in cold working die steel material, except Fe, also comprise following element, by weight percentage: C1.72%, Cr12.03%, V0.25%, Mo0.50%, Si0.15%, Mn0.10%, S0.020%, P0.015%, Ni0.05%, Cu0.1%, Fe are surplus, and each element weight percent sum is 100%.
Except Fe, following element is also comprised in alloy inoculant, by weight percentage: RE18.2%, Mg4.1%, Si26.5%, Mn3.0%, Ca3.5%, Ti2.1%, Fe is surplus, and each element weight percent sum is 100%.The quality of the alterant added is 0.4% of the quality of cold working die steel material.
The step that the cold working die steel material of the present embodiment is applied to when cold working die module is cast is identical with the step in above-described embodiment, does not repeat them here.
The hardness of the cold working die module obtained by the present embodiment cold working die steel material and alloy inoculant is 63HRC, and ultimate compression strength is 5120Mpa, and bending strength is 4010Mpa, can meet the user demand of cold-work die.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (4)
1. a cold working die steel material, is characterized in that, also comprises following element in material except Fe, by weight percentage: C1.55 ~ 1.75%, Cr11.50 ~ 12.50%, V0.20 ~ 0.30%, Mo0.45 ~ 0.55%, Si is not more than 0.25%, Mn and is not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu0.1% ~ 0.2%, Fe is surplus, and each element weight percent sum is 100%.
2. cold working die steel material according to claim 1, is characterized in that, also comprises following element in material except Fe, by weight percentage: C1.72%, Cr12.03%, V0.25%, Mo0.50%, Si are not more than 0.25%, Mn and are not more than 0.20%, S is not more than 0.030%, P is not more than 0.030%, Ni and is not more than 0.15%, Cu0.1% ~ 0.2%, Fe is surplus, and each element weight percent sum is 100%.
3. one kind is applicable to the alloy inoculant of the cold working die steel material described in claim 1 or 2, it is characterized in that, except Fe, following element is also comprised in alterant, by weight percentage: RE14.0 ~ 20.5%, Mg3.0 ~ 4.5%, Si25 ~ 30%, Mn3.0 ~ 4.0%, Ca3.0 ~ 5.0%, Ti1.5 ~ 2.5%, Fe is surplus, and each element weight percent sum is 100%.
4. alloy inoculant according to claim 3, is characterized in that, also comprises following element in alterant except Fe, by weight percentage: RE18.2%, Mg4.1%, Si26.5%, Mn3.0%, Ca3.5%, Ti2.1%, Fe are surplus, and each element weight percent sum is 100%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310205472.6A CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201310079850 CN103147008A (en) | 2013-03-13 | 2013-03-13 | Cold-work mould steel material and alloy modifying agent |
| CN201310079850.0 | 2013-03-13 | ||
| CN201310205472.6A CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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| CN103320709A CN103320709A (en) | 2013-09-25 |
| CN103320709B true CN103320709B (en) | 2015-12-09 |
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| CN201310205472.6A Active - Reinstated CN103320709B (en) | 2013-03-13 | 2013-05-28 | Cold working die steel material and alloy inoculant |
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| CN103924164A (en) * | 2014-04-10 | 2014-07-16 | 铜陵南江鑫钢实业有限公司 | High chrome alloy steel material and preparation method thereof |
| CN105648359B (en) * | 2016-04-14 | 2018-01-12 | 山东鸿民轧辊模具有限公司 | A kind of wear-resisting cold work die steel and application and preparation method |
| CN106011691B (en) * | 2016-07-27 | 2018-07-03 | 东莞市闻誉实业有限公司 | Alloy product |
| CN107937827B (en) * | 2017-11-24 | 2019-05-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the production method of steel polishing performance |
| CN109957718A (en) * | 2017-12-26 | 2019-07-02 | 武汉理工大学 | A kind of casting cold work die steel and preparation method thereof |
| CN114058959A (en) * | 2021-11-12 | 2022-02-18 | 成都先进金属材料产业技术研究院股份有限公司 | High-carbon die steel and preparation method thereof |
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| JP3603427B2 (en) * | 1995-10-31 | 2004-12-22 | 愛知製鋼株式会社 | Manufacturing method of cold tool steel with extremely small dimensional change after heat treatment |
| CN1321214C (en) * | 2005-07-29 | 2007-06-13 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
| CN1807657A (en) * | 2006-02-09 | 2006-07-26 | 谢廷声 | Steel-smelting alterant for molten steel refining |
| CN101314180A (en) * | 2008-05-12 | 2008-12-03 | 中钢集团邢台机械轧辊有限公司 | Cold-forming die steel collars anticentripetal composite casting technique for rail beam and section |
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| CN103320709A (en) | 2013-09-25 |
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