A soft memory steel ring with good softness and elasticity and a preparation method thereof

Abstract

The present application relates to the technical field of underwear steel rings, and more specifically, to a soft steel ring with good memory and elasticity and a preparation method thereof, which is prepared from the following raw materials including the following weight percentages: 50-55% nickel, 2-6% chromium, 0.5-1% silver, 0.3-2.1% copper, 0.1-0.5% additives, 0.2-0.4% rare earth oxides, and the remaining amount is titanium. The additives include lanthanum, yttrium and titanium boride. By adopting the above formula, the prepared soft steel ring with good memory and elasticity has good elasticity, tensile strength and softness, making the soft steel ring with good memory and elasticity more comfortable to use. And the soft steel ring with good memory and elasticity in this application contains temperature-sensitive memory and can adjust the hardness with body temperature.

Description

Technical Field

[0001] The present application relates to the technical field of underwear steel rings, and more specifically, to a soft steel ring with good softness and elasticity and a preparation method thereof. Background Art

[0002] An underwire is a support structure used in women's bras, usually made of metal materials such as stainless steel. This underwire is designed to provide extra support and shaping, allowing the wearer to better maintain the shape of the breasts while wearing the bra.

[0003] The material of bra underwire is usually metal steel or stainless steel. Metal steel and stainless steel are hard and have poor elasticity. Wearing bras with underwire for a long time can easily cause compression of the breasts, resulting in poor blood circulation. At the same time, it is easy to deform after being washed for a long time and many times, so improvement is needed. Summary of the invention

[0004] In order to solve the problem that metal steel and stainless steel are hard and have poor elasticity, the present application provides a soft memory steel ring with good softness and elasticity and a preparation method thereof.

[0005] In a first aspect, the present application provides a soft memory steel ring with good softness and elasticity, adopting the following technical solution: a soft memory steel ring with good softness and elasticity, prepared from the following raw materials including the following weight percentages.

[0006] Nickel 50-55%

[0007] Chromium 2-6%

[0008] Silver 0.5-1%

[0009] Copper 0.3-2.1%

[0010] Additives 0.1-0.5%

[0011] Rare earth oxides 0.2-0.4%

[0012] The remainder is titanium;

[0013] The additives include lanthanum, yttrium and titanium boride.

[0014] By adopting the above technical solution, the prepared soft and elastic memory soft steel ring has good elasticity, tensile strength and softness, making the soft and elastic memory soft steel ring more comfortable to use. And the soft and elastic memory soft steel ring in this application contains temperature-sensitive memory and can adjust the hardness with body temperature, that is, the texture of the soft and elastic memory soft steel ring at room temperature is relatively hard. When wearing underwear, the temperature of the soft and elastic memory soft steel ring increases, which improves its softness, reduces the occurrence of breast compression and blood circulation problems, and the softness can be greatly improved from room temperature to 37°C, which is close to the human body temperature.

[0015] Nickel and titanium are used as the main materials in this application. The main reasons are: nickel has good ductility and corrosion resistance. The ductility enables nickel to deform when subjected to external force without breaking due to excessive stress. The corrosion resistance increases the number of times the steel ring can be washed; titanium has good elasticity and resilience, which enables the memory steel ring to withstand large deformation and return to its original shape when needed. The combined use of the two can effectively improve the elasticity and softness of the memory steel ring, and it is not easy to deform during use.

[0016] Chromium can form a dense oxide film on the surface of the memory steel ring, improving the water resistance of the memory steel ring. Silver can improve the flexibility of the memory steel ring, and copper can enhance the toughness and strength of the memory steel ring. At the same time, silver and copper have good thermal conductivity, which enables the steel ring to react more quickly when heated and improves its softness.

[0017] Rare earth oxides have unique electronic structures and chemical properties. They change the crystal structure of the alloy, which helps to enhance the elasticity and softness of the memory steel ring, allowing the steel ring to return to its original shape after being deformed by external force.

[0018] Lanthanum, yttrium and titanium boride are used as additives to further improve the elasticity, strength and softness of memory steel rings. Lanthanum and titanium boride can refine the grains, which helps to refine the microstructure of the memory steel ring and reduce the grain size. Grain refinement can improve the flexibility and elasticity of the memory steel ring; titanium boride can enhance the elasticity and toughness of the alloy, so that the soft memory steel ring has better durability and stability while maintaining softness and elasticity. Yttrium has good stability and can effectively improve the durability and reliability of the memory steel ring, so that the steel ring can maintain a stable shape and performance, and is not prone to deformation or temperature sensitivity degradation.

[0019] Preferably, the mass ratio of lanthanum, yttrium and titanium boride is (4-6):(2-3):1.

[0020] By adopting the above technical solution, the dosage of lanthanum, yttrium and titanium boride is optimized, the flexibility, elasticity and stability of the memory steel ring are further improved, and the memory steel ring is ensured not to be deformed during use.

[0021] Preferably, the rare earth oxide is at least one of cerium oxide, scandium oxide, cobalt oxide, neodymium oxide, germanium oxide and lanthanum oxide.

[0022] By adopting the above technical solution, the types of rare earth oxides are optimized, the crystal structure of the alloy is effectively improved, and the elasticity of the memory steel ring is increased, making it less likely to deform during use.

[0023] Preferably, it is prepared from the following raw materials in the following weight percentages.

[0024] Nickel 55%

[0025] Chromium 5%

[0026] Silver 1%

[0027] Copper 1.5%

[0028] Additive 0.5%

[0029] Rare earth oxides 0.2%

[0030] The remainder is titanium;

[0031] The additives include lanthanum, yttrium and titanium boride.

[0032] By adopting the above technical solution, the amount of soft memory steel ring with good softness and elasticity is optimized, so that the elasticity, softness and strength are better, it is not easy to deform during use, and it is soft and comfortable.

[0033] In a second aspect, the present application provides a method for preparing a soft, elastic, and memory-soft steel ring, using the following technical solution:

[0034] A method for preparing a soft, elastic and memory soft steel ring, which is prepared from the following raw materials in the following weight percentages.

[0035] A method for preparing a soft, elastic, memory-soft steel ring, comprising the following steps

[0036] S1. Mix titanium, nickel, chromium, silver and copper, grind them into powder, and obtain mixed powder;

[0037] S2, put the mixed powder into a vacuum furnace, then add additives and rare earth oxides, keep the vacuum furnace sealed, the vacuum degree is 300-500Pa, heat to 1950-2000℃ and keep the temperature constant for 180-240min, unseal, release the pressure naturally, keep the temperature constant at 1600-1800℃ for 20-30min, and obtain alloy liquid;

[0038] S3. Inject the alloy liquid into the mold and cool it to room temperature to obtain a soft memory steel ring with good softness and elasticity.

[0039] Titanium, nickel, chromium, silver and copper have different melting points and are difficult to mix and melt. In step S1, titanium, nickel, chromium, silver and copper are ground, which is conducive to accelerating the melting of the metal. After the mixed powder is melted, additives and rare earth oxides are added to promote the uniform mixing of titanium, nickel, chromium, silver, copper, additives and rare earth oxides. Vacuum melting is to reduce the reaction of titanium, nickel, chromium, silver and copper with oxygen and nitrogen during the smelting process, thereby avoiding the formation of impurities such as oxides and nitrides, and ensuring the purity of the memory steel ring. Heating to 1950-2000℃ and keeping the temperature constant for 180-240min helps to homogenize the components of titanium, nickel, chromium, silver and copper and remove impurities. After natural pressure relief, continue to keep the alloy liquid at a higher temperature for a period of time, which helps to further homogenize and stabilize the components of titanium, nickel, chromium, silver and copper, and improve the elasticity and softness of the memory steel ring.

[0040] Preferably, in step S1, paraffin is added during the grinding process, and the amount of the paraffin is 0.1-0.2 times the amount of the titanium.

[0041] By adopting the above technical scheme, the grinding and mixing of titanium, nickel, chromium, silver and copper are accelerated, which is conducive to forming a uniform alloy melt. At the same time, the oxidation of titanium, nickel, chromium, silver and copper is prevented, the impurities in the memory steel ring are reduced, and the product quality is improved.

[0042] Preferably, in step S2, the temperature is increased to 1950-2000°C at a heating rate of 40-60°C / min.

[0043] Titanium, nickel, chromium, silver and copper have different melting points. In order to ensure that titanium, nickel, chromium, silver and copper can reach their melting points and transform into liquid, the temperature should be raised evenly and gradually to ensure that titanium, nickel, chromium, silver and copper can be heated evenly and reach their melting state, avoiding incomplete melting or local overheating due to uneven temperature. If the heating rate is too fast, the composition of the molten titanium, nickel, chromium, silver and copper will be uneven, which will affect the flexibility, elasticity and stability of the memory steel ring.

[0044] Preferably, during cooling in step S3, the cooling rate is 15-20°C / min.

[0045] By adopting the above technical solution, the phenomenon of cracking caused by too rapid cooling can be avoided, the impact on subsequent product processing can be reduced, and the quality can be higher.

[0046] Preferably, after cooling to room temperature in step S3, forging is performed, and the specific steps are as follows:

[0047] Heat the formed steel ring to 1100-1200℃ within 2-3h, keep it warm for 40-60min, and cool it to room temperature.

[0048] By adopting the above technical solution, the distribution of titanium, nickel, chromium, silver and copper in the memory steel ring can be effectively improved, so that the internal structure of the steel ring will be further uniform. At the same time, it helps to eliminate the residual stress generated by the steel ring during the forming process, improve the flexibility, elasticity and stability of the memory steel ring, and make it less likely to deform.

[0049] Preferably, the cooling rate is 30-50°C / min.

[0050] By adopting the above technical solution and optimizing the cooling speed, cracking caused by over-rapid cooling can be prevented, while also preventing the hardness of the memory steel ring from increasing and its flexibility from decreasing.

[0051] In summary, this application has the following beneficial effects:

[0052] 1. Soft, comfortable and elastic: In this application, a soft and elastic memory steel ring is prepared by using nickel, chromium, silver, copper, additives, rare earth oxides and titanium, so that the softness and elasticity of the memory steel ring are greatly improved, making it more suitable for wearing and can withstand multiple washings without deformation.

[0053] 2. Contains temperature-sensitive memory and can adjust hardness according to body temperature: In this application, nickel, titanium, silver, copper, additives and rare earth oxides are used together, so that the softness of the memory steel ring becomes softer as the temperature rises. When wearing underwear, the temperature of the soft and elastic memory steel ring increases, which increases its softness and reduces the pressure on the breasts and the occurrence of poor blood circulation. DETAILED DESCRIPTION

[0054] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used without specifying the manufacturer are all conventional products that can be purchased from the market, and the purity of all metals used is 99.9%.

[0055] Example

[0056] Example 1

[0057] A soft memory steel ring with good softness and elasticity is prepared by the following method:

[0058] S1, mixing 403 g of titanium, 500 g of nickel, 60 g of chromium, 10 g of silver and 20 g of copper, grinding into powder to obtain a mixed powder;

[0059] S2, put the mixed powder into a vacuum furnace, then put in 5g of auxiliary agent and 2g of rare earth oxide (cerium oxide), keep the vacuum furnace sealed, the vacuum degree is 300Pa, increase the temperature to 1950°C at a rate of 40°C / min, and keep the temperature constant for 180min, unseal, release the pressure naturally, keep the temperature constant at 1600°C for 20min, and obtain the alloy liquid;

[0060] S3. Inject the alloy liquid into the mold and cool it to room temperature at a cooling rate of 15°C / min to obtain a soft memory steel ring with good softness and elasticity.

[0061] The additives include 2.9 g of lanthanum, 1.4 g of yttrium and 0.7 g of titanium boride.

[0062] The difference between Example 2-3 and Example 1 is that the types, amounts and experimental parameters of some raw materials for preparing soft memory soft steel rings with good soft elasticity are different. The specific differences are shown in Table 1:

[0063] Table 1 Types, amounts and experimental parameters of raw materials for preparing soft memory soft steel rings with good soft elasticity in Examples 1-3

[0064]

[0065] In Example 2, the auxiliary agent includes 1.8 g of lanthanum, 0.9 g of yttrium and 0.4 g of titanium boride.

[0066] In Example 3, the auxiliary agent includes 0.6 g of lanthanum, 0.3 g of yttrium and 0.1 g of titanium boride.

[0067] Example 4

[0068] A soft memory steel ring with good elasticity. The difference between this embodiment and embodiment 1 is that: 1.4g of lanthanum, 2.9g of yttrium and 0.7g of titanium boride, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0069] Example 5

[0070] A soft memory steel ring with good elasticity. The difference between this embodiment and embodiment 1 is that: 0.7g of lanthanum, 1.4g of yttrium and 2.9g of titanium boride, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0071] Example 6

[0072] A soft memory steel ring with good soft elasticity. The difference between this embodiment and embodiment 1 lies in: 368g of titanium, 550g of nickel, 50g of chromium, 10g of silver, 15g of copper, 5g of additives and 2g of cerium oxide. The other experimental parameters are consistent with those of embodiment 1.

[0073] Example 7

[0074] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that in step S1, paraffin is added during the grinding process, and the amount of paraffin used is 40.3g.

[0075] Example 8

[0076] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that in step S1, paraffin is added during the grinding process, and the amount of paraffin used is 80.6g.

[0077] Example 9

[0078] A memory soft steel ring with good soft elasticity. The difference between this embodiment and embodiment 1 is that after cooling to room temperature in step S3, forging treatment is performed. The specific steps are as follows:

[0079] Heat the formed steel ring to 1100℃ within 2 hours, keep it warm for 40 minutes, and put it into pure water at 10℃.

[0080] Example 10

[0081] A memory soft steel ring with good soft elasticity. The difference between this embodiment and embodiment 1 is that after cooling to room temperature in step S3, forging treatment is performed. The specific steps are as follows:

[0082] Heat the formed steel ring to 1200℃ within 3 hours, keep it warm for 60 minutes, and put it into pure water at 5℃.

[0083] Embodiment 11

[0084] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that in step S2, the temperature is increased to 1950°C at a heating rate of 80°C / min.

[0085] Comparative Example

[0086] Comparative Example 1

[0087] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that iron is used instead of an equal amount of nickel, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0088] Comparative Example 2

[0089] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that no chromium is added, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0090] Comparative Example 3

[0091] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that no silver is added, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0092] Comparative Example 4

[0093] A soft memory steel ring with good soft elasticity. The difference between this embodiment and embodiment 1 is that copper is not added, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0094] Comparative Example 5

[0095] A soft memory steel ring with good soft elasticity. The difference between this embodiment and embodiment 1 is that cerium oxide is not added, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0096] Comparative Example 6

[0097] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that no additives are added, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0098] Comparative Example 7

[0099] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that the auxiliary agent is lanthanum, and the types, amounts and experimental parameters of other raw materials are consistent with those of embodiment 1.

[0100] Comparative Example 8

[0101] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that the auxiliary agent is yttrium, and the types, amounts and experimental parameters of other raw materials are consistent with those of embodiment 1.

[0102] Comparative Example 9

[0103] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that the auxiliary agent is titanium boride, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0104] Comparative Example 10

[0105] A soft memory steel ring with good softness and elasticity. The difference between this embodiment and embodiment 1 is that iron is used instead of an equal amount of titanium, and the other raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0106] Performance testing

[0107] The soft memory soft steel rings with good softness and good elasticity prepared in Examples 1-10 and Comparative Examples 1-10 were subjected to tensile strength, elastic modulus, deformation tests and softness tests.

[0108] Test method / test method Tensile strength: refer to GB / T28487-2012 "Tensile test method for determination of tensile strength of precious metal and alloy chains".

[0109] Elastic modulus: refer to GBT 22315-2008 "Test method for elastic modulus and Poisson's ratio of metallic materials".

[0110] Deformation test: The soft, elastic and memory soft steel rings prepared in Examples 1-11 and Comparative Examples 1-9 were respectively assembled on underwear, and then the underwear was put into a blender and submerged with water. The speed was adjusted to 200 r / min, stirred for 2 hours, and then taken out to observe whether the soft, elastic and memory soft steel rings were deformed.

[0111] Softness: The soft, elastic and soft steel rings prepared in Examples 1-11 and Comparative Examples 1-9 were placed in an environment at a temperature of 20°C and left to stand for 2 hours. In this environment, a wooden stick with a diameter of 8 mm was prepared, one end of the soft, elastic and soft steel ring was pressed, and the soft, elastic and soft steel ring was wrapped around the wooden stick to observe how many times the soft, elastic and soft steel ring could be wrapped.

[0112] The soft, elastic and soft steel ring with good memory prepared in Examples 1-11 and Comparative Examples 1-9 were placed in an environment with a temperature of 37°C and left to stand for 2 hours. In this environment, a wooden stick with a diameter of 8 mm was prepared, one end of the soft, elastic and soft steel ring with good memory was pressed, and the soft, elastic and soft steel ring with good memory was wound around the wooden stick to observe how many times the soft, elastic and soft steel ring with good memory could be wound.

[0113] The experimental data are shown in Table 2:

[0114] Table 2 Experimental data of Examples 1-11 and Comparative Examples 1-9

[0115]

[0116]

[0117] It can be seen from Examples 1-11 and Comparative Examples 1-9 in combination with Table 2 that in the present application, by preparing a soft and elastic soft memory steel ring with nickel, chromium, silver, copper, additives, rare earth oxides and titanium together, the elasticity, softness and tensile strength of the soft and elastic soft memory steel ring can be effectively improved. It is not easy to deform during use, and the softness is better when the temperature rises.

[0118] Comparing Example 1 with Comparative Example 1, the values ​​of tensile strength and elastic modulus in Comparative Example 1 are both reduced, and deformation occurs in the deformation test. In the softness test, the number of winding turns of Comparative Example 1 is lower than that of Example 1, indicating that the present application prepares a soft and elastic memory soft steel ring by adding nickel and other raw materials, which can effectively improve the elasticity, softness and tensile strength of the soft and elastic memory soft steel ring, and is not easy to deform during use.

[0119] By comparing Example 1 with Comparative Examples 2-6, the values ​​of tensile strength and elastic modulus in Comparative Examples 2-6 are both reduced, Comparative Examples 2-3 and 6 are deformed in the deformation test, and the number of winding turns of Comparative Examples 2-6 in the softness test is lower than that of Example 1, indicating that the soft memory soft steel ring with good soft elasticity is prepared by combining nickel, chromium, silver, copper, additives, rare earth oxides and titanium, which can further improve the elasticity, softness and tensile strength of the soft memory soft steel ring with good soft elasticity, thereby making its comprehensive performance better.

[0120] By comparing Example 1 with Comparative Examples 6-9, the values ​​of tensile strength and elastic modulus in Comparative Examples 2-6 are both reduced, Comparative Examples 6-7 and 9 are deformed in the deformation test, and the number of winding turns of Comparative Examples 6-9 in the softness test is lower than that of Example 1, indicating that by using lanthanum, yttrium and titanium boride as additives, the elasticity, softness and tensile strength of the soft memory steel ring with good soft elasticity can be further improved, so that its comprehensive performance is better.

[0121] Comparing Example 1 with Example 4-5, the values ​​of tensile strength and elastic modulus in Example 4-5 are increased, and the number of winding turns of Example 4-5 in the softness test is higher than that of Example 1, indicating that optimizing the dosage of lanthanum, yttrium and titanium boride can further improve the elasticity, softness and tensile strength of the soft memory steel ring with good soft elasticity.

[0122] By comparing Example 1 with Examples 7-8, the values ​​of tensile strength and elastic modulus in Examples 7-8 are both increased, indicating that in step S1, paraffin is added during the grinding process to further improve the elasticity, softness and tensile strength of the soft memory steel ring with good softness and elasticity.

[0123] By comparing Example 1 with Examples 9-10, the values ​​of tensile strength and elastic modulus in Examples 9-10 are increased, and the number of winding turns of Examples 9-10 in the softness test is higher than that of Example 1, indicating that after cooling to room temperature in step S3, the formed steel ring is forged, which is beneficial to improving the elasticity, softness and tensile strength of the soft memory steel ring with good soft elasticity.

[0124] By comparing Example 1 with Example 11, the values ​​of tensile strength and elastic modulus in Example 11 are both reduced, indicating that optimizing the heating rate in step S2 is beneficial to improving the elasticity, softness and tensile strength of the soft memory steel ring with good soft elasticity.

[0125] Comparing Example 1 with Comparative Example 10, the values ​​of tensile strength and elastic modulus in Comparative Example 10 are both reduced, and deformation occurs in the deformation test. In the softness test, the number of winding turns of Comparative Example 10 is higher than that of Example 1, indicating that the present application prepares a soft and elastic memory soft steel ring by adding nickel and other raw materials, which can effectively improve the elasticity, softness and tensile strength of the soft and elastic memory soft steel ring, and is not easy to deform during use.

[0126] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A soft memory steel ring with good softness and elasticity, characterized in that: Prepared from raw materials comprising the following weight percentages: Nickel 50-55% Chromium 2-6% Silver 0.5-1% Copper 0.3-2.1% Additives 0.1-0.5% Rare earth oxides 0.2-0.4% The remainder is titanium; The additives include lanthanum, yttrium and titanium boride; The mass ratio of lanthanum, yttrium and titanium boride is (4-6): (2-3): 1; The rare earth oxide is at least one of cerium oxide, scandium oxide, neodymium oxide and lanthanum oxide; The method for preparing the soft memory soft steel ring with good soft elasticity comprises the following preparation steps S1. Mix titanium, nickel, chromium, silver and copper, grind them into powder, and obtain mixed powder; S2, put the mixed powder into a vacuum furnace, then add additives and rare earth oxides, keep the vacuum furnace sealed, the vacuum degree is 300-500Pa, heat to 1950-2000℃ and keep the temperature constant for 180-240min, unseal, release the pressure naturally, cool down and keep the temperature constant at 1600-1800℃ for 20-30min to obtain alloy liquid; S3, injecting the alloy liquid into the mold and cooling it to room temperature to obtain a soft memory steel ring with good soft elasticity; In step S1, paraffin is added during the grinding process, and the amount of the paraffin is 0.1-0.2 times the amount of the titanium; In step S2, the temperature is increased to 1950-2000°C at a heating rate of 40-60°C / min.

2. A soft memory steel ring with good softness and elasticity according to claim 1, characterized in that: Prepared from raw materials including the following weight percentages Nickel 55% Chromium 5% Silver 1% Copper 1.5% Additives 0.5% Rare earth oxides 0.2% The remainder is titanium; The additives include lanthanum, yttrium and titanium boride.

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