A composite steel for ice skate blade and a method for manufacturing the same

Abstract

The application discloses a kind of ice skate blade composite steel and preparation method thereof, ice skate blade composite steel includes sequentially arranged: upper layer;Middle layer;Lower layer;Wherein, upper layer, lower layer are stainless steel material;Middle layer is high-carbon chromium steel material.Chemical composition of high-carbon chromium steel material of middle layer is: C:1.20%, Si:0.3%, Mn:0.5%, Cr:14.5%, Mo:4.0%, V:1.2%.Chemical composition of stainless steel material of upper layer 11, lower layer 13 is: C:0.03%, Si:0.3%, Mn:0.5%, Cr:17.5%, Ni:12%, Mo:2.0%.The ice skate blade composite steel prepared by the application has wear resistance, sharpness retention after being made into ice skate blade, so that the whole ice skate has good toughness, plasticity and good corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite steel and its preparation, in particular to a composite steel for ice skates and a preparation method thereof. BACKGROUND

[0002] With the popularity of winter tourism industry in cities such as Heilongjiang and Harbin, and the hot development of various ice sports competitions, the multi-level ice and snow economic system is gradually improved, and the ice and snow economy is developing at full speed. According to the "China Ice and Snow Industry Development Research Report (2023)", the total scale of China's ice and snow industry is expected to reach 1 trillion yuan in 2025.

[0003] Skating is an important part of ice and snow sports. When people think of skating, they will think of ice skates and ice skates. With the development of ice and snow economy, the demand for ice skates and ice skates has increased significantly. As an important part of ice skate shoes, the material of ice skates usually has several types: high carbon steel, alloy chromium steel and stainless steel. Each material has its own characteristics. The hardness of high carbon steel can reach 56-60HRC, and it can still maintain sharpness after long-term use, which is loved by many professional skaters and skating enthusiasts. Its disadvantage is that it is easy to rust and needs more maintenance. Alloy chromium steel: The hardness of alloy chromium steel can reach about 60HRC, and it has certain corrosion resistance. However, the toughness of chromium steel is poor and prone to cracking. Stainless steel is corrosion resistant and not prone to rust, but its disadvantage is that the hardness is relatively low, only about 58HRC, and needs to be sharpened frequently to maintain sharpness. Because different materials have different advantages and disadvantages, ice skate manufacturers have been thinking about how to combine the advantages of various materials to make ice skates with better performance. In this context, research on ice skate steel is needed.

[0004] In order to solve the problems existing in the prior art, the present application provides a composite steel for ice skates and a preparation method thereof:

[0005] 1) The high-carbon chromium steel and stainless steel are combined by material selection, the center is high-carbon chromium steel, and the hardness after heat treatment can reach more than HRC60, and has good oxidation resistance;

[0006] 2) The structure is designed as follows: the two sides are stainless steel, which has good corrosion resistance and impact toughness; after the combination of the two materials, the new material has the excellent performance of high-carbon chromium steel and stainless steel, and has better comprehensive performance: wear resistance, oxidation resistance, corrosion resistance and impact toughness. SUMMARY

[0007] The present application relates to the technical field of composite steel and its preparation, in particular to a composite steel for ice skates and a preparation method thereof.

[0008] The present application relates to the technical field of composite steel and its preparation, in particular to a composite steel for ice skates and a preparation method thereof.

[0009] By material selection of high-carbon chromium steel and stainless steel composite, the center is high-carbon chromium steel, and the hardness after heat treatment can reach HRC60 or more, and has good oxidation resistance;

[0010] The structure design is: both sides are stainless steel, which has good corrosion resistance and impact toughness; After the composite of the two materials, the new material has the excellent performance of high-carbon chromium steel and stainless steel at the same time, and has better comprehensive performance: wear resistance, oxidation resistance, corrosion resistance and impact toughness.

[0011] A composite steel for ice skate, the composite steel for ice skate comprises, in sequence:

[0012] an upper layer;

[0013] an intermediate layer;

[0014] a lower layer;

[0015] wherein,

[0016] the upper layer and the lower layer are both stainless steel materials;

[0017] the intermediate layer is high-carbon chromium steel material.

[0018] As a further improvement of the present solution, the thickness of the composite steel for ice skate is 3.5-4.5mm.

[0019] As a further improvement of the present solution, the proportion of the intermediate high-carbon chromium steel in the thickness of the composite material is 40%-60%.

[0020] As a further improvement of the present solution, the total thickness of the composite blank of the composite steel for ice skate is a, satisfying the quantitative relationship: a≥25mm.

[0021] As a further improvement of the present solution, the chemical composition of the high-carbon chromium steel material of the intermediate layer is: C: 1.20%, Si: 0.3%, Mn: 0.5%, Cr: 14.5%, Mo: 4.0%, V: 1.2%.

[0022] As a further improvement of the present solution, the chemical composition of the stainless steel material of the upper layer 11 and the lower layer 13 is: C: 0.03%, Si: 0.3%, Mn: 0.5%, Cr: 17.5%, Ni: 12%, Mo: 2.0%.

[0023] A preparation method of a composite steel for ice skate, comprising the following preparation steps:

[0024] S1 pretreatment of raw materials before compounding and compounding

[0025] S11 pretreatment of raw materials

[0026] Before compounding, the interface to be compounded is treated flat and smooth by milling and grinding, and the metal color is exposed, and then the foreign matter on the flat surface is removed by acetone or alcohol;

[0027] S12 compounding of the pretreated raw material

[0028] The interface of the side surface and the end surface of the compounded blank is closed by welding;

[0029] S2 hot rolling

[0030] The compounded blank is subjected to a hot rolling process to form a whole of the three-layer composite material;

[0031] The specific operation steps are as follows: the compounded blank is heated to 1100-1200 DEG C, and is kept at a uniform temperature inside and outside the compounded blank, and then is hot-rolled into a composite strip or plate with a thickness of 3.5-4.5 mm;

[0032] S3 recrystallization annealing

[0033] The hot-rolled composite strip in the step is subjected to complete recrystallization annealing, and the annealing temperature is 800-900 DEG C, and the annealed composite strip or plate is subjected to an acid pickling or shot blasting process to remove the oxide skin, and the steel strip with the oxide skin removed is obtained;

[0034] S4 edge cutting of the steel strip

[0035] The annealed steel strip with the surface oxide skin removed is subjected to edge cutting, the welding material welded on the edge portion during the compounding of the steel blank is removed, and the three-layer structure composite material is obtained;

[0036] S5 heat treatment

[0037] The heat treatment process of the composite steel for the ice skate blade comprises quenching + tempering. The quenching temperature is 1080-1130 DEG C, and the oil cooling is adopted.

[0038] As a further improvement of the present scheme, the quenching temperature in S5 is 1080-1130 DEG C.

[0039] As a further improvement of the present scheme, the tempering temperature is 150-180 DEG C.

[0040] Compared with the prior art, the present application has the following beneficial effects:

[0041] Compared with the prior art, the composite steel for the ice skate blade of the present application has the following beneficial effects:

[0042] 1) The composite steel for the ice skate blade of the present application adopts a three-layer compounding process, the middle layer is high-carbon chromium steel, and the two side surfaces are stainless steel. After heat treatment, the high-carbon chromium steel has a hardness of more than 60HRC and a PREN value of 27; the two side stainless steels have high toughness and plasticity, and the elongation of the composite steel is more than 5%;

[0043] 2) The manufacturing method of the composite steel for ice skate of the present application adopts three-layer composite process, the middle is high-carbon chromium steel, and both sides are stainless steel, the total thickness of the composite blank is controlled to be ≥25 mm, which can ensure that the composite blank has sufficient reduction ratio when hot-rolled to ≤4.5 mm to realize metallurgical bonding;

[0044] 3) The manufacturing method of the composite steel for ice skate of the present application adopts three-layer composite process, the middle is high-carbon chromium steel, and both sides are stainless steel, wherein the thickness ratio of the high-carbon chromium steel is 40-60%, which can ensure that the thickness of the middle high-carbon chromium steel reaches 1.4 mm or above, meeting the thickness requirement of the ice skate blade, and the elongation reaches 5% or above;

[0045] 4) A manufacturing method of a composite steel for ice skate, which adopts three-layer composite process, the middle is high-carbon chromium steel, and both sides are stainless steel, the production process is simple and feasible. The ice skate made of the composite steel manufactured by this method has wear resistance, sharpness retention, good toughness, plasticity and good corrosion resistance. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The figure is a schematic view of the composite steel structure for ice skate of the present application;

[0047] Mark explanation:

[0048] 11 - upper layer;

[0049] 12 - middle layer;

[0050] 13 - lower layer. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described below in combination with examples:

[0052] The composite steel for ice skate of the present application adopts three-layer composite process, and the specific results and preparation method are as follows:

[0053] As shown in Figure 1 A composite steel for ice skate, the composite steel for ice skate comprises, in sequence:

[0054] upper layer 11; middle layer 12; lower layer 13;

[0055] Among them,

[0056] The upper layer 11 and the lower layer 13 are both stainless steel materials;

[0057] The middle layer 12 is a high-carbon chromium steel material.

[0058] As a preferred example, the thickness of the composite steel for ice skate is 3.5-4.5 mm.

[0059] As a preferred embodiment, the intermediate high-carbon chromium steel accounts for 40% to 60% of the thickness of the composite material.

[0060] As a preferred embodiment, the total thickness of the composite blank of the composite steel for ice skate blade satisfies the quantitative relationship: a≥25mm.

[0061] As a preferred embodiment, the chemical composition of the high-carbon chromium steel material of the intermediate layer 12 is: C: 1.20%, Si: 0.3%, Mn: 0.5%, Cr: 14.5%, Mo: 4.0%, V: 1.2%.

[0062] As a preferred embodiment, the chemical composition of the stainless steel material of the upper layer 11 and the lower layer 13 is: C: 0.03%, Si: 0.3%, Mn: 0.5%, Cr: 17.5%, Ni: 12%, Mo: 2.0%.

[0063] A preparation method of a composite steel for ice skate blade, comprising the following preparation steps:

[0064] S1 Pretreatment of raw materials before compounding and compounding

[0065] S11 Pretreatment of raw materials

[0066] Before compounding, the interface to be compounded is treated flat and smooth by milling and grinding, and the metal color is exposed, and then the foreign matter on the flat surface is removed by acetone or alcohol;

[0067] S12 Compounding of raw materials after pretreatment

[0068] The interface of the side surface and the end surface of the composite blank is closed by welding;

[0069] S2 Hot rolling

[0070] The three-layer composite material is formed into a whole by hot rolling process of the compounded blank;

[0071] The specific operation steps are as follows: the compounded blank is heated to 1100-1200℃, and the temperature inside and outside the composite blank is uniformly kept, and then hot rolling is performed to form a composite strip or plate with a thickness of 3.5-4.5mm;

[0072] S3 Recrystallization annealing

[0073] The composite strip after hot rolling in the step is subjected to complete recrystallization annealing, and the annealing temperature is 800-900℃, and the composite strip or plate after annealing is subjected to pickling or shot blasting process to remove the oxide skin, thereby obtaining a steel strip with the oxide skin removed;

[0074] S4 Steel strip edge cutting

[0075] The steel strip after annealing and removing surface oxide is trimmed, the welding material welded on the edge part is removed when the composite steel blank is welded, and a three-layer structure composite composite material is obtained.

[0076] S5 heat treatment

[0077] The heat treatment process of the composite steel for ice skate blade includes quenching + tempering.

[0078] The quenching temperature in S5 is 1080-1130 DEG C, and the tempering temperature is 150-180 DEG C.

[0079] Structural view Figure 1 The middle part is high-carbon chromium steel, and the two sides are stainless steel, and the typical chemical components are shown in Table 1. The thickness ratio of the middle high-carbon chromium steel in the composite material is 40%-60%.

[0080] Table 1 shows the specific material composition of the composite steel

[0081]

[0082] The composite steel for ice skate blade provided by the application has wear resistance, oxygen resistance, corrosion resistance and impact toughness.

[0083] After heat treatment, the hardness of the composite steel for ice skate blade is above 60HRC at the center, the overall elongation is above 5%, the PREN value of the pitting corrosion resistance index is above 22, and the composite steel has good corrosion resistance and oxidation resistance.

[0084] The examples and comparative examples are as follows:

[0085] Example:

[0086] The high-carbon chromium steel in Table 1 is selected as the center material of the composite blank, and at the same time, comparative example 1 is selected, and the thickness of comparative example 1 is 4.5mm; the stainless steel in Table 1 is selected as the two side materials, and is symmetrically distributed on both sides of the center high-carbon chromium steel, and at the same time, the stainless steel is selected as comparative example 2, and the thickness of comparative example 2 is 4.5mm. Different thicknesses of high-carbon chromium steel and stainless steel are selected to form composite blanks to form examples 1-6, and the specific values are shown in Table 2.

[0087] The thickness of the high-carbon chromium steel at the center of the blank of examples 1-6 is 10-40mm, the thickness of the stainless steel on both sides is 7.5-15mm, the total thickness of the blank is 25-70mm, and the thickness ratio of the center is between 40-60%.

[0088] Before the compounding, the interface to be compounded is treated flat and smooth by milling and grinding, and all the metallic color is exposed, then the foreign matter on the flat surface is removed by acetone or alcohol, and the interface of the side and end surface of the compounded blank is closed by welding to avoid the oxidation of the compounded surface during heating.

[0089] The compounded blank with the thickness ratio according to the examples 1-6 is heated to 1100-1200℃, and kept until the temperature inside and outside the compounded blank is uniform, and then hot-rolled into a compounded plate with a thickness of 4.5mm. After the ultrasonic inspection, no air hole or interlayer defect is detected inside the hot-rolled plate, and the interface of the three-layer compounded material after hot-rolling becomes a whole, and the metallurgical combination is realized. It can be seen that when the thickness of the blank reaches 25mm or above, and the thickness of the hot-rolled plate is ≤4.5mm, the interface of the compounded material can realize firm metallurgical combination.

[0090] The compounded coil after hot-rolling is completely recrystallized annealed, the annealing temperature is 870℃, and after keeping for 8 hours, it is slowly cooled to room temperature, and the hot-rolled plate after annealing is subjected to the shot blasting process to remove the oxide scale. And the steel strip after removing the surface oxide scale is subjected to edge cutting, and the welding material welded on the edge of the compounded blank is removed and used.

[0091] The thickness of the center layer of the material after hot-rolling of the examples 1-6, taking examples 1 and 4 as examples, the thickness of the center layer is 1.6mm, and it can be seen that the ratio of the center thickness to the total thickness after hot-rolling is basically consistent with the ratio before hot-rolling. The thickness of the ice skate blade is generally 3.5-4.0mm, and the thickness of the blade edge of the working part is 1.4mm, when the thickness of the compounded steel material is 3.5-4.5mm, and the thickness ratio of the high-carbon chromium steel is 40-60%, the thickness of the middle high-carbon chromium steel can reach 1.4mm, which can meet the thickness requirement of the ice skate blade edge.

[0092] The heat treatment process of the compounded steel for the ice skate blade includes quenching + tempering.

[0093] The annealed steel plate of the examples 1-6 is subjected to quenching and tempering heat treatment, the quenching temperature is 1100℃, and the oil cooling is to room temperature; the tempering temperature is 160℃, and the tempering time is 4 hours.

[0094] The properties of the samples of the examples 1-6 are shown in Table 3, after 1100℃ quenching + 160℃ tempering, the hardness of the center high-carbon chromium steel is 61-62HRC, which is consistent with the hardness of the traditional high-carbon chromium steel comparative example 1, and higher than the hardness requirement of the ordinary ice skate blade edge ≥56HRC. The overall elongation of the samples of the examples 1-6 after heat treatment is tested, and the result is 5.3-8.1%, which is much higher than the elongation of the traditional high-carbon chromium steel comparative example 1, and it can be predicted that the compounded steel has good toughness and plasticity.

[0095] Table 2 comparative examples 1-2 and examples 1-6 process parameters

[0096]

[0097]

[0098] Table 3 Performance test results of sample of comparative examples 1-2 and examples 1-6

[0099]

[0100] As shown in Tables 1-2, the elongation of the composite steel is 7.6% and 8.1% for example 1 and example 4 with the center thickness ratio of 40%; the elongation of the composite steel is 6.4% and 6.6% for example 2 and example 5 with the center thickness ratio of 50%; the elongation of the composite steel is 5.4% and 5.8% for example 3 and example 6 with the center thickness ratio of 57%. The higher the center thickness ratio, the lower the elongation of the composite steel. When the center thickness ratio is not higher than 60%, the elongation of the composite steel can be more than 5%.

[0101] In the field of stainless steel, the PREN value = Cr + 3.3Mo represents the corrosion resistance of the stainless steel. The higher the value, the stronger the corrosion resistance. When the PREN value is more than 13, the stainless steel can resist the corrosion of the atmospheric environment; when the PREN value is 17, the stainless steel can resist the corrosion of the weak corrosive environment; when the PREN value is 21, the stainless steel can resist the corrosion at a certain temperature. The PREN value of the composite steel is calculated according to the chemical composition of the two composite steel raw materials in Table 1, which is shown in Table 3. As can be seen from Table 3, the PREN value of the center material of the composite steel is 27, and the PREN value of the two side materials is 23. Therefore, when the composite steel is made into an ice skate, the PREN value of the center material as the blade is 27, which has the ability of high-temperature corrosion resistance and oxidation resistance, and the PREN value of the two side materials as the ice skate is 23, which also has relatively high corrosion resistance.

[0102] As can be seen from the above experimental analysis, the composite steel for the ice skate has a hardness of more than 60HRC at the center, an overall elongation of more than 5%, and a PREN value = Cr + 3.3Mo of more than 22 after heat treatment. The blade of the ice skate has wear resistance and sharpness retention, and the whole ice skate has good toughness, plasticity, and good corrosion resistance.

[0103] The above examples show that the steel of the application can achieve more excellent fatigue performance after the above heat treatment process, and is particularly suitable for manufacturing valve plates, and can also be used in other fields with high quality requirements.

[0104] The above description is only preferred embodiments of the application, and does not limit the patent scope of the application. Any equivalent transformation made by using the application is within the patent protection scope of the application.

Claims

1. A composite steel for ice skates, characterized in that: The composite steel for ice skates is arranged in sequence: an upper layer (11), It is composed of a middle layer (12) and a lower layer (13); in, The upper layer (11) and the lower layer (13) are both made of stainless steel; The middle layer (12) is made of high carbon chromium steel; The chemical composition of the high carbon chromium steel material of the intermediate layer (12) is: C: 1.20%, Si: 0.3%, Mn: 0.5%, Cr: 14.5%, Mo: 4.0%, V: 1.2%, and the balance is Fe; The chemical composition of the stainless steel material of the upper layer (11) and the lower layer (13) is: C: 0.03%, Si: 0.3%, Mn: 0.5%, Cr: 17.5%, Ni: 12%, Mo: 2.0%, and the balance is Fe; The thickness of composite steel for ice skates is 3.5~4.5mm; The proportion of the intermediate high carbon chromium steel in the thickness of the composite material is 40% to 60%; The middle layer material PREN=23, the upper and lower layer PREN=27; The total thickness of the composite billet of composite steel for ice skates is a, which satisfies the quantitative relationship: a≥25mm.

2. A method for preparing the composite steel for ice skates according to claim 1, characterized in that: The method comprises the following preparation steps: S1 Pretreatment of raw materials before compounding and compounding S11 Pretreatment of raw materials Before compounding, use milling and grinding methods to make the interface to be compounded flat and smooth, and expose the metallic color completely, and then use acetone or alcohol to remove foreign matter on the flat surface; S12 Composite of raw materials after pretreatment The interfaces of the side and end faces of the composite blank are sealed by welding; S2 Hot Rolling The composite blank is hot rolled to form the three layers of composite material into a whole; The specific operation steps are as follows: heating the composite billet to 1100-1200℃, keeping the temperature until the temperature inside and outside the composite billet is uniform, and then hot rolling it into a composite strip with a thickness of 3.5-4.5mm; S3 recrystallization annealing The composite strip after hot rolling in step S2 is subjected to complete recrystallization annealing at a temperature of 800-900° C. The composite strip after annealing is subjected to a pickling or shot blasting process to remove oxide scale to obtain a descaled steel strip; S4 steel strip trimming The annealed and descaled steel strip is trimmed, and the welding material welded on the edge during the composite blanking process is removed to obtain a composite material with a three-layer structure. S5 heat treatment The heat treatment process of composite steel for ice skates includes: quenching + tempering, quenching temperature is 1080~1130℃, and oil cooling.

3. The method for preparing composite steel for ice skates according to claim 2, characterized in that: The tempering temperature is 150~180℃.

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