CN1061696C - Ni-Cr alloy for false tooth - Google Patents
Ni-Cr alloy for false tooth Download PDFInfo
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- CN1061696C CN1061696C CN98101637A CN98101637A CN1061696C CN 1061696 C CN1061696 C CN 1061696C CN 98101637 A CN98101637 A CN 98101637A CN 98101637 A CN98101637 A CN 98101637A CN 1061696 C CN1061696 C CN 1061696C
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Abstract
The present invention relates to a Ni-Cr alloy for a false tooth, which belongs to the field of a Ni-Cr alloy. The present invention is mainly used for a crown and a crown bridge of a porcelain teeth, etc. The present invention is characterized in that the concrete chemical compositions are (weight%): C <0.08, Si <2.15, Mn <0.2, 11 to 14 of Cr, 2.4 to 3.0 of Mo, 2.0 to 3.0 of Sn, 2.7 to 301 of Sn, 2.7 to 3.1 of Nb, Mg <0.01, B <0.01 and 0.005 to 0.02 of Ce, and the rest is Ni. The alloy of the present invention has low cost, and the production condition is simple and practical. The present invention does not contain toxic elements, and has good antioxidation and corrosion resistance performance, and the present invention is matched with the existing porcelain cement for use.
Description
The invention belongs to the nickel-base alloy field.Be mainly used in the porcelain tooth with being preced with the bridge etc. of coming of age.
Metal and alloy material thereof have long applicating history in stomatology.The development of metallurgy thereupon, the application of metallic substance is extensive day by day, becomes stomatologic base mateiral.
As far back as 1897-1907, come from the investment wax casting art of industry, just become a kind of important working method of clinical oral to metallic substance.The various dummy foundry goods that adopt casting to make, the not only strain hardening that does not bring, and even structure because of mechanical cold working, pattern is accurate, the meticulous form of model can be duplicated out.
Porcelain tooth casting alloy, strict especially to material requirements, require alloy that high intensity is arranged; Good toughness plasticity; Good grinding; Require alloy to have the function that is complementary with the porcelain powder; Also require the alloy organizing good stability; Owing in the oral cavity, use for a long time, require alloy that well anti-oxidant and corrosion resistance nature is arranged.
U.S. Pat pat NO 4205982, introducing among the US pat No 4350526 all has precious metals such as picture: Pd, Gu, Ru, Sh, Ag, Ga, Ir in the alloy, though use properties is good, owing to cost an arm and a leg, range of application is restricted.
China now uses among the imported materials and items VeraBond (AALBA DENT INC USA), shows by analysis and contains a certain amount of Be element.This element produces obnoxious flavour in smelting, the harm people's is healthy, even causes poisoning.In addition, require the working condition strictness, the equipment complexity can't be produced under the existing working condition of China.
It is low to the invention provides a kind of cost, working condition is simple, and does not contain the Ni-Cr alloy for false tooth of poisonous element, and this alloy not only has good anti-oxidant and erosion resistance, but also have good casting and cutting ability, with the fine use that is complementary of existing porcelain powder energy.
Based on above-mentioned purpose, in Ni base alloy, add Cr element, Mo element, to improve the oxidation-resistance of alloy, erosion resistance and certain intensity; The Nb element keeps alloy that favorable tissue stability is arranged, and considers the model complicacy of casting corona, adds the Sn element to improve the alloy casting performance.Because Sn causes grain boundary segregation easily, elements reinforcement and purification crystal boundaries such as Mg, B, Ce have been added.
Concrete chemical ingredients of the present invention (weight %) is: C:＜0.08, and 0＜Si＜2.15, Mn:＜0.2, Cr:11-14, Mo:2.4-3.0, Sn:2.0-3.0, Nb:2.7-3.1,0＜Mg＜0.01,0＜B＜0.01, Ce:0.005-0.02, surplus is Ni.
The effect of each element in the following division alloy.
The Cr element interaction: main purpose is to improve the anti-oxidant and corrosion resistance nature of alloy, forms Cr in alloy
2O
3Protective layer.Cr
2O
3Oxide compound has densification, and low cationvacancy prevents atoms metal to surface diffusion and oxygen, sulphur, and harmful elements such as nitrogen are to the metal internal diffusion.Prevent the continuation oxidation of alloy effectively.But Cr forms TCP phase element, and TCP is mutually too much, alloy strength is reduced, so Cr content should be controlled at 11-14%.
Mo element interaction: be the solution strengthening element, certain solubleness is arranged in r.In addition, an amount of Mo content and Ni, Cr form alloy at H
2SO
4, HCL, H
3PO
4In reductinic acid, and the solidity to corrosion in HF gas and at FeCl
3Anti-pitting in the solution all improves, and Mo forms σ phase element, and alloy plasticity is descended, and the Mo content range is at 2.4-3.0%.
Nb element interaction: Nb is the principal element of reinforcement and stable γ ', can play and strengthen sosoloid and make the stable effect of alloy structure, simultaneously, the adding energy crystal grain thinning of Nb reduces the fragility phase or changes its distribution and form, and is useful to improving the alloy over-all properties, an amount of Nb alloy content makes alloy be difficult for producing the crystal face corrosion, in addition, also can be by the coefficient of expansion of Nb content levelling alloy, Nb is controlled at 2.7-3.1%.
The Sn element interaction: can reduce alloy melting point, change molten steel viscosity, in alloy casting, improve the flowability of molten steel, this can obtain good filling for the moulding castings of complex thin-walls such as all kinds of accurate ceramic crowns.Sn removes the function of oxide compound in addition, but the decline of Sn excessive meeting causing alloy property especially makes σ
bSn content descends, so should be controlled at 2.0-3.0%.
The Mg element interaction: contain an amount of MAGNESIUM METAL in nickel base superalloy, can significantly improve the intensity and the plasticity of alloy, reduce grain boundary carbide, quantity such as sulfide improve the intergranular bonding force.General Mg content is＜0.01.
Ce element interaction: with O, S higher avidity is arranged, can reduce O and S content in the alloy.Appropriate C e content can promote alloy surface Cr
2O
3The generation of fine and close protective membrane improves the alloy oxidation corrosive power, and content is 0.005-0.02%.
B element interaction: mainly work purifying crystal boundary effect, content＜0.01%.
The present invention can melting in vacuum oven, and the alloy after the melting directly pours in the casting mold for preparing in advance, treats to obtain foundry goods after its condensation, and foundry goods and porcelain powder at high temperature sinter artificial tooth into.
Compared with prior art, the present invention has following advantage:
(1) cost is low, material cost according to alloy is calculated, because of containing precious metals such as Pd, Ag, Ir, Cu, alloy assesses the cost about 40,000 yuan/Kg in United States Patent (USP) (US4205982, the US4350526) alloy, and alloy of the present invention assesses the cost about 90 yuan/Kg.
(2) do not contain poisonous element in the alloy of the present invention, the healthy of protection environment and operator is beneficial to, in addition, the production simple possible of alloy of the present invention.
(3) anti-oxidant and corrosive nature is good, with artificial saliva alloy sample is done the dip etching test and show the weight loss after two days＜0.03%.
(4) have advantages of good casting and grinding performance, can well mate use with existing porcelain powder, and structure property is stable, the linear expansivity α of alloy of the present invention is 14 (10
-6/ ℃) about, Brinell hardness＞200HB.
Embodiment
According to the chemical ingredients scope, in vacuum oven, smelt 4 stoves alloy of the present invention.The concrete Chemical Composition of alloy is shown in Table 1, the various sample blanks of cast after the melting, after processing, carried out performance test respectively, the results are shown in Table shown in 2, the corrosion test of alloy is with reference to the standard recipe of artificial saliva, to 4 batches of alloy sample dippings, measure the weight loss after two days, it the results are shown in Table 3.
With the alloy heat fused, the alloy with fusing is molded in the casting mold for preparing in advance then, treats to obtain foundry goods after its condensation.Foundry goods and porcelain powder sinter artificial tooth under high temperature, the bonding properties of observing artificial tooth enamel and alloy sees Table 4.
Calculate the cost of the present invention's 4 stove alloys according to the material cost of alloy, see Table 5 with the cost contrast of United States Patent (USP) trade mark alloy.The Chemical Composition (weight %) of table 1 embodiment alloy
The performance of table 2 embodiment alloy
The corrosion weight loss test of table 3 alloy sample
Table 4 enamel combines effect with alloy
The cost of alloy synopsis that table 5 calculates according to material cost
| Sequence number | The porcelain powder | In conjunction with effect observation |
| 1 | The U.S. (Biobond) | Good |
| 2 | Japan's (loose wind) | Good |
| 3 | Germany (riTa) | Good |
| 4 | The U.S. (Biobond) | Good |
Claims (1)
1, a kind of Ni-Cr alloy for false tooth, it is characterized in that its concrete chemical ingredients is (weight %): C:＜0.08,0＜Si＜2.15, Mn:＜0.2, Cr:11-14, Mo:2.4-3.0, Sn:2.0-3.0, Nb:2.7-3.1,0＜Mg＜0.01,0＜B＜0.01, Ce:0.005-0.02, surplus is Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101637A CN1061696C (en) | 1998-04-24 | 1998-04-24 | Ni-Cr alloy for false tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101637A CN1061696C (en) | 1998-04-24 | 1998-04-24 | Ni-Cr alloy for false tooth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1201837A CN1201837A (en) | 1998-12-16 |
| CN1061696C true CN1061696C (en) | 2001-02-07 |
Family
ID=5216831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98101637A Expired - Fee Related CN1061696C (en) | 1998-04-24 | 1998-04-24 | Ni-Cr alloy for false tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1061696C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100519795C (en) * | 2006-05-24 | 2009-07-29 | 中国科学院金属研究所 | Odontology nickel-chromium stove enamel alloy and application thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643062A (en) * | 2013-12-07 | 2014-03-19 | 山东建筑大学 | Nickel oxide-silicon carbide particle enhanced nickel-chromium alloy oral medicine material |
| CN105506388A (en) * | 2015-12-24 | 2016-04-20 | 常熟市梅李合金材料有限公司 | Nickel-chromium round wire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4350526A (en) * | 1980-08-04 | 1982-09-21 | The J. M. Ney Company | Palladium/silver alloy for use with dental procelains |
-
1998
- 1998-04-24 CN CN98101637A patent/CN1061696C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4350526A (en) * | 1980-08-04 | 1982-09-21 | The J. M. Ney Company | Palladium/silver alloy for use with dental procelains |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100519795C (en) * | 2006-05-24 | 2009-07-29 | 中国科学院金属研究所 | Odontology nickel-chromium stove enamel alloy and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1201837A (en) | 1998-12-16 |
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