CN103898414A - Steel for plastic mold and mold for plastic molding - Google Patents
Steel for plastic mold and mold for plastic molding Download PDFInfo
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- CN103898414A CN103898414A CN201410127570.7A CN201410127570A CN103898414A CN 103898414 A CN103898414 A CN 103898414A CN 201410127570 A CN201410127570 A CN 201410127570A CN 103898414 A CN103898414 A CN 103898414A
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Abstract
The invention relates to a steel product for preparing a mold for plastic molding. The steel product mainly comprises the following elements in percentage by weight: 0.015%-0.025% of C, 0.02%-0.05% of Si, 0.09%-0.21% of Mn, 0.005%-0.02% of P, 0.005%-0.015% of S, 0.02%-0.06% of Alt, 0.05%-0.09% of Cr, 0.02%-0.04% of V, 0.002%-0.004% of N and the balance of Fe and other unavoidable impurities. The mold for plastic molding disclosed by the invention is made of the steel product for preparing the mold for plastic molding. Thus, the mold has excellent thermal conductivity, corrosion resistance and higher hardness and meets the needs of actual production.
Description
Technical field
The present invention relates to steel and plastic shaping mould for plastic shaping mould, belong to metallic substance technical field.
Background technology
In plastic paste shaping dies, the specification of quality such as the batch of downtrodden plastics kind, production, the complexity of workpiece, dimensional precision and surfaceness are the principal elements that determines that Steel for Plastic Die is selected.Plastics are roughly divided into thermosetting resin and the large class of thermoplastics two, and every class is divided into again different kinds.Due to the kind difference of molding plastic, and the different requirements of size to plastics, shape, precision, surfaceness etc., wear resistance, erosion resistance, thermotolerance, resistance to pressure, magnetic performance, micro-distortion and mirror polish performance etc. to Steel for Plastic Die have different requirements.General plastic die steel is for the production of the mould of general plastic (as polyethylene, polypropylene) workpiece.When production lot less, dimensional precision and surfaceness are without particular requirement and mold sections when little, can adopt structural carbon steel SM50, SM55 steel or soft steel 10,20 steel makings, the former adopts modified or normalizing treatment, and the latter adopts carburizing to add the temper of quenching.Soft steel, because resistance to deformation is low, plasticity is good, is mainly used in the method compacting tool set mould cavity manufacture mould that adopts cold-extrusion shaping.As mentioned above, people have required to have excellent thermal conductivity, erosion resistance and hardness for the steel of plastic shaping mould recently.But, also do not have steel can meet all requirements completely, therefore, a kind of new technical scheme of exigence solves the problems of the technologies described above.
Summary of the invention
Therefore, just for there is technical problem in the present invention in prior art, a kind of steel for plastic shaping mould are provided, and compared with traditional steel, these steel have excellent balance between thermal conductivity, erosion resistance and hardness.
To achieve these goals, technical scheme of the present invention is as follows:
Steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.015-0.025%, Si:0.02-0.05%, Mn:0.09-0.21%, P:0.005-0.02%, S:0.005-0.015%, Alt:0.02-0.06%; Cr:0.05-0.09%, V:0.02-0.04%, N:0.002-0.004%, surplus is that Fe and other inevitable impurity form.
As a modification of the present invention, described steel also comprise following element, in % by weight, also comprise Nb:0.01%～0.03%, Ti:0.01%～0.03%.
Steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.018-0.023%, Si:0.025-0.045%, Mn:0.092-0.20%, P:0.0053-0.18%, S:0.0052-0.014%, Alt:0.025-0.056%; Cr:0.053-0.089%, V:0.022-0.034%, N:0.0025-0.0034%, surplus is that Fe and other inevitable impurity form.
As a modification of the present invention, described steel also comprise following element, in % by weight, also comprise Nb:0.015%～0.028%, Ti:0.013%～0.028%.
As a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.019-0.022%, Si:0.026-0.044%, Mn:0.093-0.18%, P:0.0055-0.16%, S:0.0054-0.012%, Alt:0.03-0.05%; Cr:0.054-0.088%, V:0.025-0.032%, N:0.0026-0.0032%, surplus is that Fe and other inevitable impurity form.
As a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.020-0.021%, Si:0.028-0.04%, Mn:0.096-0.16%, P:0.0058-0.15%, S:0.0058-0.01%, Alt:0.035-0.045%; Cr:0.06-0.08%, V:0.03-0.031%, N:0.0028-0.003%, surplus is that Fe and other inevitable impurity form.
As a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.020%, Si:0.03%, Mn:0.15%, P:0.12%, S:0.009%, Alt:0.04%; Cr:0.07%, V:0.03%, N:0.0029%, surplus is that Fe and other inevitable impurity form.
As a modification of the present invention, described steel also comprise following element, in % by weight, also comprise Nb:0.016%～0.026%, Ti:0.015%～0.026%.
A kind of plastic shaping mould, it is to make as raw material by the steel described in above-mentioned any one.
Described in technique scheme, why element is selected like this, specifically the reasons are as follows:
C: if C content will be reduced to below 0.015%, metallic solution poor fluidity, when C content is high, in alloy structure, carbide quantity is many, matrix hardness is high, and wear resistance is good, if but C exceedes a certain amount of, along with C content increases, carbide significantly increases again, and toughness, shock resistance decline.The cost of steel making working procedure and manufacture difficulty all can limit raising.C content exceedes 0.025% and easily produces the mass defects such as continuously cast bloom chink, and from temper angle, C content is also difficult for too high, and C is important solution strengthening element, in steel, C content can directly affect cementite content in steel matrix, along with carbon content increases, in tissue, cementite content increases, and armor plate strength improves relatively.The present invention is according to actual Steel Capacity, and preferable range is 0.015%～0.025%.
When Si:Si content exceedes 0.05%, the avidity of Si and oxygen is greater than chromium, can deoxidation, can in fusion process, reduce again the loss of chromium.Si can solid solution plays the effect of solution strengthening in matrix, and along with the increase matrix hardness of Si content increases thereupon, and the fragility of steel plate also increases thereupon.Si is larger in temperature, while being generally greater than 900 ℃, can form fine and close zone of oxidation, improves to a certain extent firm material surface antioxidant property.Consider its impelling strength and oxidation-resistance, technical solution of the present invention is set Si content 0.02～0.005%.
Mn:Mn is important solution strengthening element, in order to guarantee the comprehensive mechanical intensity of steel, add suitable Mn and improve armor plate strength, manganese has deoxidization desulfuration effect to molten steel simultaneously, be conducive to eliminate the non-metallic inclusion in steel, the form of improving inclusion and distribution, thereby improve intensity and the toughness of steel.Mn can with the unlimited solid solution of Fe, improve the strength of materials, toughness, with other alloy phase ratios, its price is comparatively cheap, can partly substitute other alloys.It is 0.09%～0.21% that technical solution of the present invention is set Mn content range.
P: in this technical scheme, P, S element are impurity element, and if these two kinds of constituent contents are higher, its content that can reduce steel is more low better, in this technical scheme, limit handling scope is 0.005～0.015% at P: 0.005%～0.020%, S.
The avidity of Alt:Al and oxygen is larger, can guarantee melting time deoxidation abundant, again can solid solution in steel.In this technical scheme, the effect of Al is as follows, and first Al, as reductor, is to guarantee deoxidation effect, and Alt content is not less than 0.02%; Next is for solid N, in order to improve the ageing resistance energy of material, must contain the Al of q.s, to produce AlN with the N in steel, but Alt too high levels, easily nozzle clogging problem in casting cycle, and easily form Al
2o
3non-metallic inclusion.Preferable range is 0.02～0.06%.
Cr: in the present invention; Cr is as important carbide forming element; for the C element of fixing steel; to improve the ageing resistance performance of material; why high-chromium alloy has higher resistance toheat; be mainly to make adding of Cr alloy extexine under high temperature action, can generate the Cr2O3 protective layer of one deck densification, stop or the oxidising process that delayed alloy turns to internal oxidation by external oxidation.Under worst hot case, owing to being subject to the effect of stress etc., oxide film and lower top layer crack, for the internal oxidation of alloy provides air supply channel.High-chromium alloy itself has repair ability to crackle, and Cr content is higher, stronger to crackle repair ability; Lower than in 0.05% time, there is the MC3 type carbide that hardness is lower in chromium content, wear resistance is poor in tissue, and carbide crystal boundary distributes and causes material fragility large; When chromium content is greater than 0.09%, occur the M7C3 type carbide of high rigidity in tissue, wear resistance is good; Along with the further raising of chromium carbon ratio, M7C3 carbide decreases, the part chromium of solid solution in austenitic matrix can be separated out M23C6 type carbide, and material hardness reduces, and wear resistance declines on the contrary, and high chromium easily forms frangible compounds, and castability is poor., in this technical scheme, limit Cr content 0.05～0.09%.
V: in this technical scheme, V is for C, the N element of fixing steel, and V-arrangement becomes in addition carbon, nitrogen compound are favourable to the toughness of steel, meanwhile, when its too high levels, the intensity of steel can obviously raise, and limiting its scope is 0.002～0.04%.
N:N element easily causes the principal element of material timeliness, belong in the present invention the element as far as possible reducing, but N content is lower, and it is larger that difficulty is controlled in steel-making, considers, and limits N content 0.002%～0.004%..
Nb and Ti:Nb, Ti are common microalloy strengthening elements, can obviously improve the over-all properties of steel.Ti is very strong solid N element, utilize the Ti of 0.01% left and right just can fix the N below 0.004% in steel, form the TiN precipitated phase of tiny high-temperature stable, Austenite Grain Growth when this tiny TiN particle can hinder high temperature effectively, also contribute to improve the solid solubility of Nb in austenite, thus the strengthening effect that has indirectly improved niobium.Owing to adding microalloy element Nb, stoped grain growth, refinement crystal grain, improved product mechanical property.The strengthening mechanism of the combined microalloying of Nb, Ti, comprises precipitation strength and refined crystalline strengthening.Appropriate Ti can form tiny TiN, can effectively stop again grain coarsening.Nb, Ti have obvious precipitation strength effect in compared with the steel of low carbon content, and in order further to strengthen the wear resistance of steel, technical solution of the present invention sets that Nb content range is 0.01%～0.03%, the content range of Ti is 0.01%～0.03%;
Plastic shaping mould of the present invention adopts above-mentioned making as raw material with the steel of mould for plastic shaping.Therefore, this mould has excellent thermal conductivity, erosion resistance and more intense hardness, can meet the various needs of actual production.
Embodiment
In order to deepen understanding of the present invention and understanding, below in conjunction with embodiment to further instruction of the present invention and introduction.
embodiment 1:steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.015%, Si:0.02%, Mn:0.09%, P:0.005%, S:0.005%, Alt:0.02%; Cr:0.05%, V:0.02%, N:0.002%, Nb:0.01%, Ti:0.01%.Surplus is that Fe and other inevitable impurity form.
embodiment 2:steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.025%, Si:0.05%, Mn:0.21%, P:0.02%, S:0.015%, Alt:0.06%; Cr:0.09%, V:0.04%, N:0.004%, Nb:0.03%, Ti:0.03%.Surplus is that Fe and other inevitable impurity form.
embodiment 3:steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.018%, Si:0.025%, Mn:0.092%, P:0.0053%, S:0.0052%, Alt:0.025%; Cr:0.053%, V:0.022%, N:0.0025%, Nb:0.015%, Ti:0.013%, surplus is that Fe and other inevitable impurity form.
embodiment 4:steel for plastic shaping with mould, these steel are mainly made up of lower column element: in % by weight, C:0.023%, Si:0.045%, Mn:0.20%, P:0.18%, S:0.014%, Alt:0.056%; Cr:0.089%, V:0.034%, N:0.0034%, Nb:0.028%, Ti:0.028%, surplus is that Fe and other inevitable impurity form.
embodiment 5:as a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.019%, Si:0.026%, Mn:0.093%, P:0.0055%, S:0.0054%, Alt:0.03%; Cr:0.054%, V:0.025%, N:0.0026%, Nb:0.016%, Ti:0.015%, surplus is that Fe and other inevitable impurity form.
embodiment 6:as a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.022%, Si:0.044%, Mn:0.18%, P:0.16%, S:0.012%, Alt:0.05%; Cr:0.088%, V:0.032%, N:0.0032%, Nb:0.026%, Ti:0.026%, surplus is that Fe and other inevitable impurity form.
embodiment 7:as a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.020%, Si:0.028%, Mn:0.096%, P:0.0058%, S:0.0058%, Alt:0.035%; Cr:0.06%, V:0.03%, N:0.0028%, Nb:0.016%, Ti:0.015%, Nb:0.018%, Ti:0.019%, surplus is that Fe and other inevitable impurity form.
embodiment 8:as a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.021%, Si:0.04%, Mn:0.16%, P:0.15%, S:0.01%, Alt:0.045%; Cr:0.08%, V:0.031%, N:0.003%, Nb:0.025%, Ti:0.025%, Nb:0.022%, Ti:0.022%, surplus is that Fe and other inevitable impurity form.
embodiment 9:as a modification of the present invention, described these steel are mainly made up of lower column element: in % by weight, and C:0.020%, Si:0.03%, Mn:0.15%, P:0.12%, S:0.009%, Alt:0.04%; Cr:0.07%, V:0.03%, N:0.0029%, Nb:0.016%～0.026%, Ti:0.015%～0.026%, surplus is that Fe and other inevitable impurity form.
embodiment 10:mould of the present invention is the mould that adopts above-mentioned steel of the present invention to make as raw material.From wear resistance, erosion resistance, minute surface characteristic equal angles, the hardness of mould of the present invention is preferably in the scope of 49HRC-53HRC.The hardness of mould of the present invention refers to the hardness of moulding stock (base mateiral) itself, and this hardness is by the part that is not both also subject to any impact of various surface-treateds through cold worked work hardening is detected and determined.
It should be noted that above-described embodiment is only preferred embodiment of the present invention, be not used for limiting protection scope of the present invention, being equal to of making on the basis of above-described embodiment replaced or substituted, and all belongs to protection scope of the present invention.
Claims (9)
1. the steel with mould for plastic shaping, these steel are mainly made up of lower column element: in % by weight, C:0.015-0.025%, Si:0.02-0.05%, Mn:0.09-0.21%, P:0.005-0.02%, S:0.005-0.015%, Alt:0.02-0.06%; Cr:0.05-0.09%, V:0.02-0.04%, N:0.002-0.004%, surplus is that Fe and other inevitable impurity form.
2. the steel of using according to claim 1 mould for plastic shaping, is characterized in that, described steel also comprise following element, in % by weight, also comprise Nb:0.01%～0.03%, Ti:0.01%～0.03%.
3. the steel with mould for plastic shaping, these steel are mainly made up of lower column element: in % by weight, C:0.018-0.023%, Si:0.025-0.045%, Mn:0.092-0.20%, P:0.0053-0.18%, S:0.0052-0.014%, Alt:0.025-0.056%; Cr:0.053-0.089%, V:0.022-0.034%, N:0.0025-0.0034%, surplus is that Fe and other inevitable impurity form.
4. the steel of using according to claim 3 mould for plastic shaping, is characterized in that, described steel also comprise following element, in % by weight, also comprise Nb:0.015%～0.028%, Ti:0.013%～0.028%.
5. use according to claim 3 the steel of mould for plastic shaping, it is characterized in that, described these steel are mainly made up of lower column element: in % by weight, C:0.019-0.022%, Si:0.026-0.044%, Mn:0.093-0.18%, P:0.0055-0.16%, S:0.0054-0.012%, Alt:0.03-0.05%; Cr:0.054-0.088%, V:0.025-0.032%, N:0.0026-0.0032%, surplus is that Fe and other inevitable impurity form.
6. according to the steel of using mould described in claim 3 or 5 for plastic shaping, it is characterized in that, described these steel are mainly made up of lower column element: in % by weight, C:0.020-0.021%, Si:0.028-0.04%, Mn:0.096-0.16%, P:0.0058-0.15%, S:0.0058-0.01%, Alt:0.035-0.045%; Cr:0.06-0.08%, V:0.03-0.031%, N:0.0028-0.003%, surplus is that Fe and other inevitable impurity form.
7. the steel of using according to claim 6 mould for plastic shaping, is characterized in that, described these steel are mainly made up of lower column element: in % by weight, and C:0.020%, Si:0.03%, Mn:0.15%, P:0.12%, S:0.009%, Alt:0.04%; Cr:0.07%, V:0.03%, N:0.0029%, surplus is that Fe and other inevitable impurity form.
8. the steel of using according to claim 3 mould for plastic shaping, is characterized in that, described steel also comprise following element, in % by weight, also comprise Nb:0.016%～0.026%, Ti:0.015%～0.026%.
9. a plastic shaping mould, it is to require the steel described in any one in 1 to 8 to make as raw material by right to use.
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| CN201410127570.7A CN103898414A (en) | 2014-04-01 | 2014-04-01 | Steel for plastic mold and mold for plastic molding |
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| CN201410127570.7A CN103898414A (en) | 2014-04-01 | 2014-04-01 | Steel for plastic mold and mold for plastic molding |
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| CN103898414A true CN103898414A (en) | 2014-07-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063512A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Plastic die steel and manufacturing method thereof |
| CN105112794A (en) * | 2015-08-25 | 2015-12-02 | 石家庄钢铁有限责任公司 | Low-cost plastic mold steel and production method thereof |
| CN105177429A (en) * | 2015-10-20 | 2015-12-23 | 宁波德科精密模塑有限公司 | Plastic mold steel and mold for forming plastics |
| CN113459415A (en) * | 2021-06-26 | 2021-10-01 | 嘉兴市翊盛电子科技有限公司 | Plastic shell mold and production process |
| CN114875324A (en) * | 2022-05-19 | 2022-08-09 | 山西太钢不锈钢股份有限公司 | Steel for pre-hardened corrosion-resistant template and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112794A (en) * | 2015-08-25 | 2015-12-02 | 石家庄钢铁有限责任公司 | Low-cost plastic mold steel and production method thereof |
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| CN113459415A (en) * | 2021-06-26 | 2021-10-01 | 嘉兴市翊盛电子科技有限公司 | Plastic shell mold and production process |
| CN114875324A (en) * | 2022-05-19 | 2022-08-09 | 山西太钢不锈钢股份有限公司 | Steel for pre-hardened corrosion-resistant template and manufacturing method thereof |
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Application publication date: 20140702 |