A hot nozzle and method of additive manufacturing thereof

Abstract

The application provides a hot nozzle and an additive manufacturing method thereof, wherein the EOS Stainless Steel CX metal powder and the AMPCOLOY940 metal powder are combined to manufacture a first part and a nozzle tip part, so that the problems of slow heat conduction of a traditional nozzle and short service life of a nozzle tip are solved, the additive manufacturing method fully utilizes the advantages of 3D printing technology and metal powder, and provides a more efficient and more economical manufacturing method for the hot nozzle; meanwhile, the method can shorten the product development cycle, improve the production efficiency, and has great market potential.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a hot nozzle and its additive manufacturing method. Background Technology

[0002] The hot runner injection molding process involves heating engineering plastic raw materials, such as PE, PP, and fiberglass, to a fluid state within the injection cavity, which then flows through the hot runner nozzle into the injection mold for molding. The hot runner system includes hot runner nozzles, which are primarily made of three materials: beryllium copper, cemented carbide, and ordinary mold steel. The requirements for hot runner nozzle materials are, firstly, wear resistance, and secondly, good thermal conductivity. Beryllium copper has good thermal conductivity but is not wear-resistant; ordinary mold steel has poor thermal conductivity but good wear resistance; and cemented carbide is too expensive.

[0003] Chinese patent document CN110774544A, published in 2020, discloses a nozzle tip for hot runners and its preparation method. Specifically, it discloses a nozzle tip for hot runners comprising a nozzle tip body and a nozzle tip portion. The nozzle tip body has a welding surface at its top for welding, and the nozzle tip portion is welded and fixed to the welding surface. The method involves first placing a copper alloy nozzle tip body on the working platform of an additive manufacturing equipment, then melting alloy powder on the surface of the nozzle tip body at high temperature to fuse it integrally with the nozzle tip body. This process is repeated to repeatedly lay and melt the powder, ultimately forming a nozzle tip structure of various materials. However, the nozzle tip portion in the aforementioned patent document still suffers from poor wear resistance, requiring frequent nozzle replacements and resulting in low production efficiency.

[0004] Therefore, further improvements are needed. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide an additive manufacturing method for hot nozzles to overcome the shortcomings of the prior art. This additive manufacturing method makes the hot nozzles more wear-resistant, thermally conductive and longer-lasting, and effectively improves production efficiency.

[0006] An additive manufacturing method for a hot nozzle designed for this purpose includes a nozzle body, one end of which is provided with a nozzle tip, and includes the following steps:

[0007] Step S1: Establish a three-dimensional model of the hot nozzle;

[0008] Step S2: Based on the 3D printing laser cladding process, the nozzle body model and the nozzle tip model are separated;

[0009] Step S3: Set the machining allowance according to the nozzle body model and the nozzle tip model;

[0010] Step S4: Machining the blank size of the nozzle body;

[0011] Step S5, material mixing: The first metal powder and the second metal powder are mixed to form a metal mixed powder;

[0012] Step S6: Based on the three-dimensional model in step S2, perform slicing processing on the 3D printing model of the tip to obtain the slice data of the tip part.

[0013] Step S7: Import the second slice model into the 3D printing equipment to print the metal mixed powder layer by layer on one end of the nozzle body and perform laser melting and shaping until the nozzle tip part is formed.

[0014] Step S8: Perform the first slice model processing based on the 3D model in step S2 to obtain the slice data of the first part of the part.

[0015] Step S9: The first slice model is imported into the 3D printing equipment, and the metal mixed powder is laid layer by layer at the other end of the nozzle body and laser melting is performed until the first part is formed.

[0016] Step S10: Clean and grind the first part of the parts.

[0017] Steps S8-10 are set between steps S2-S6;

[0018] Step S11: Perform precision machining on the blank dimensions of the nozzle body, the first part, and the tip part; the thermal conductivity of the nozzle body is 208 W / mk;

[0019] Step S12: After the final cleaning of the nozzle tip part is completed, vacuum heat treatment is performed; the hardness of the nozzle tip part is 48-50 HRC.

[0020] The first metal powder is EOS StainlessSteel CX metal powder;

[0021] The EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C).

[0022] The second metal powder material is AMPCOLOY940 metal powder;

[0023] The AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu).

[0024] The particle size of the EOS StainlessSteel CX metal powder is >63μm.

[0025] The iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are present in the following weight percentages: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%.

[0026] Carbon (C): C < 0.05%; Iron (Fe) balance.

[0027] The nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are in the following weight percentages: nickel (Ni): 2.5%; silicon (Si): 0.7%; chromium (Cr): 0.4%; copper (Cu) balance.

[0028] A hot nozzle manufactured by the above-mentioned additive manufacturing method for hot nozzles includes a nozzle body, a nozzle tip at one end of the nozzle body, the nozzle tip and the nozzle body being separately formed, the nozzle body being formed from at least beryllium copper, the nozzle tip being formed by 3D printing laser cladding of metal mixed powder; and a first part formed by 3D printing laser cladding of metal mixed powder at the other end of the nozzle body.

[0029] The metal mixed powder includes EOS StainlessSteel CX metal powder and AMPCOLOY940 metal powder;

[0030] The EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C).

[0031] The particle size of the EOS StainlessSteel CX metal powder is >63μm;

[0032] The iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are present in the following weight percentages: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%; Carbon (C): C < 0.05%; Iron (Fe) balance.

[0033] The AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu).

[0034] The nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are in the following weight percentages: nickel (Ni): 2.5%; silicon (Si): 0.7%; chromium (Cr): 0.4%; copper (Cu) balance.

[0035] Compared with the prior art, the hot nozzle and its additive manufacturing method described in the above embodiments have the following advantages: By combining EOS StainlessSteel CX metal powder with AMPCOLOY940 metal powder to manufacture the first part and the nozzle tip part, the problems of slow heat conduction and short service life of traditional nozzles are solved. This additive manufacturing method makes full use of the advantages of 3D printing technology and metal powder, providing a more efficient and economical manufacturing method for hot nozzles. At the same time, this method can also shorten the product development cycle, improve production efficiency, and has great market potential. Attached Figure Description

[0036] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the forming structure of the nozzle body, the tip, and the first part of the component in one embodiment of the present invention.

[0039] Figure 2 This is an exploded view of the nozzle body, the nozzle tip, and the first part of the components in one embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram of the structure for processing the first part of the component in one embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the processing tip structure in one embodiment of the present invention. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] like Figures 1-4 As shown, an additive manufacturing method for a hot nozzle is provided, comprising a nozzle body 1, one end of which is provided with a nozzle tip 2, characterized by including the following steps:

[0044] Step S1: Establish a three-dimensional model of the hot nozzle;

[0045] Step S2: Based on the 3D printing laser cladding process, the nozzle body 1 model and the nozzle tip 2 model are separated;

[0046] Step S3: Set the machining allowance according to the nozzle body 1 model and the nozzle tip 2 model;

[0047] Step S4: Machining the blank dimensions of nozzle body 1;

[0048] Step S5, material mixing: The first metal powder and the second metal powder are mixed to form a metal mixed powder;

[0049] Step S6: Based on the three-dimensional model in step S2, perform slicing processing on the 3D printing model of the nozzle tip to obtain the slice data of the nozzle tip part 2.

[0050] Step S7: Import the second slice model into the 3D printing equipment to print the nozzle body 1 by layering metal mixed powder and laser melting to form the nozzle tip 2 part.

[0051] Specifically, the first part 3 and the nozzle tip 2 are manufactured by combining EOS StainlessSteel CX metal powder with AMPCOLOY940 metal powder using a 3D printing laser melting process. This solves the problems of slow heat conduction and short lifespan of traditional nozzles. This additive manufacturing method makes full use of the advantages of 3D printing technology and metal powder, providing a more efficient and economical manufacturing method for hot nozzles. At the same time, this method can also shorten the product development cycle and improve production efficiency, and has great market potential.

[0052] It should be noted that the nozzle body 1 can be made of beryllium copper, which gives the entire hot runner nozzle extremely high wear resistance and good thermal conductivity, fully meeting the requirements of hot runner injection molding process. Moreover, compared with hot runner nozzles made of hard alloy, the cost is lower. While ensuring thermal conductivity, it also increases wear resistance and improves the service life of the hot runner nozzle.

[0053] It should be noted that this manufacturing method is applicable to additive manufacturing of hot nozzles of various specifications.

[0054] Furthermore, the first metal powder is EOS StainlessSteel CX metal powder;

[0055] EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C).

[0056] The particle size of EOS StainlessSteel CX metal powder is >63μm.

[0057] By adopting the above settings, the flowability and filling properties of the powder during the 3D printing process can be guaranteed, while also meeting the specific requirements of the nozzle components for powder particle size.

[0058] Furthermore, the weight percentages of iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are as follows: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%.

[0059] Carbon (C): C < 0.05%; Iron (Fe) balance.

[0060] Specifically, EOS StainlessSteel CX is a tool-grade steel with good corrosion resistance, high strength, and high hardness.

[0061] Furthermore, the second metal powder material is AMPCOLOY940 metal powder;

[0062] AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu).

[0063] Specifically, AMPCOLOY 940 metal powder conforms to RWMA standard CASS 3 and is widely used in fields requiring good electrical and thermal conductivity as well as mechanical properties, such as injection mold parts, injection nozzles and cooling inserts.

[0064] The table below shows the mechanical and physical properties of AMPCOLOY 940 metal powder.

[0065] To elaborate further, the weight percentages of nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are as follows: nickel (Ni): 2.5%; silicon (Si): 0.7%; chromium (Cr): 0.4%; and copper (Cu) as the balance.

[0066] Furthermore, the additive manufacturing method also includes a step of using the nozzle tip as a 3D printing base:

[0067] Step S8: Perform the first slice model processing based on the 3D model in step S2 to obtain the slice data of the first part 3.

[0068] Step S9: The first slice model is imported into the 3D printing equipment, and metal mixed powder is laid layer by layer at the other end of the nozzle body 1 and laser melting is performed until the first part 3 is formed.

[0069] Step S10: Clean and smooth the first part 3;

[0070] Steps S8-10 are set between steps S2-S6.

[0071] Furthermore, the additive manufacturing method also includes step S11, which involves precision machining of the blank size of the nozzle body 1, the first part 3, and the tip part 2; the thermal conductivity of the nozzle body 1 is 208 W / mk.

[0072] Step S12: After cleaning the final nozzle tip 2 part, perform vacuum heat treatment; the hardness of the nozzle tip 2 part is 48-50 HRC.

[0073] Specifically, vacuum heat treatment of the tip 2 part can improve its hardness and toughness, preventing deformation or damage during use. The specific method involves placing the tip 2 in a vacuum furnace, heating it to a certain temperature, holding it at that temperature for a period of time, and then allowing it to cool naturally. This alters the surface structure of the tip 2, thereby increasing its hardness and toughness.

[0074] The nozzle body 1 is machined with high precision using a CNC machine tool to ensure that the precision of each part meets the design requirements; the first part 3 is finely ground to eliminate internal stress and remove defects, ensuring that its shape is regular and free of defects; the tip 2 is precision ground to ensure that its fit clearance with the nozzle body 1 meets the design requirements; the precision of the three parts is observed using an optical microscope, and adjustments are made if necessary; the three parts are cleaned to remove residual cutting fluid and powder.

[0075] The hardness of the tip part 2 can be increased from 32-36HRC to 48-50HRC after heat treatment, which can greatly improve the service life of the tip part 2.

[0076] Furthermore, such as Figure 3 and Figure 4As shown, after the other end of the nozzle body 1 is placed into the 3D printing equipment, the first slice model is imported into the 3D printing equipment. At this time, the 3D printing nozzle melts the metal mixed powder with laser and prints the other end of the nozzle body 1 into the first part 3. After the first part 3 is bonded to the other end of the nozzle body 1, it is taken out for cleaning and the end of the first part 3 is polished flat. After polishing, the first part 3 and the nozzle body 1 are placed in the 3D printing equipment, and the first part 3 is used as a base. Then, the second slice model is imported into the 3D printing equipment. At this time, the 3D printing nozzle melts the metal mixed powder with laser and prints the nozzle tip 2 part into one end of the nozzle body 1.

[0077] A hot nozzle manufactured by the above-mentioned additive manufacturing method for hot nozzles includes a nozzle body 1, a nozzle tip 2 on one end of the nozzle body 1, the nozzle tip 2 and the nozzle body 1 are separately formed, the nozzle body 1 is formed by processing at least beryllium copper material, and the nozzle tip 2 is formed by 3D printing laser cladding of metal mixed powder.

[0078] Furthermore, the other end of the nozzle body 1 is provided with a first part 3 formed by 3D printing laser cladding of metal mixed powder.

[0079] Furthermore, the metal-mixed powders include EOS StainlessSteel CX metal powder and AMPCOLOY940 metal powder;

[0080] EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C).

[0081] The particle size of EOS StainlessSteel CX metal powder is >63μm;

[0082] The weight percentages of iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are as follows: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%; Carbon (C): C < 0.05%; Iron (Fe) balance.

[0083] AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu).

[0084] The weight percentages of nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are as follows: Nickel (Ni): 2.5%; Silicon (Si): 0.7%; Chromium (Cr): 0.4%; Copper (Cu) balance.

[0085] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0090] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An additive manufacturing method for a hot nozzle, comprising a nozzle body (1), wherein one end of the nozzle body (1) is provided with a nozzle tip (2), characterized in that: Includes the following steps: Step S1: Establish a three-dimensional model of the hot nozzle; Step S2: Based on the 3D printing laser cladding process, the nozzle body (1) model and the nozzle tip (2) model are separated; Step S3: Set the machining allowance according to the nozzle body (1) model and the nozzle tip (2) model; Step S4: Machining the blank size of the nozzle body (1); Step S5, material mixing: The first metal powder and the second metal powder are mixed to form a metal mixed powder; Step S6: Based on the three-dimensional model in step S2, perform 3D printing model slicing processing on the tip to obtain the slice data of the tip (2) part; Step S7: The second slice model is imported into the 3D printing equipment to print the metal mixed powder layer by layer on one end of the nozzle body (1) and laser melting and forming until the nozzle tip (2) part is formed. Step S8: Perform the first slice model processing based on the three-dimensional model in step S2 to obtain the slice data of the first part (3); Step S9: The first slice model is imported into the 3D printing equipment, and the metal mixed powder is laid layer by layer at the other end of the nozzle body (1) and laser melting is performed until the first part (3) is formed. Step S10: Clean and grind the first part (3); Steps S8-10 are set between steps S2-S6; Step S11: The blank size of the nozzle body (1), the first part (3) and the tip part (2) are precision machined; the thermal conductivity of the nozzle body (1) is 208W / mk; Step S12: After cleaning the final nozzle tip (2) part, vacuum heat treatment is performed; the hardness of the nozzle tip (2) part is 48-50 HRC; The first metal powder is EOS StainlessSteel CX metal powder; The EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C). The second metal powder material is AMPCOLOY940 metal powder; The AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu).

2. The additive manufacturing method for the hot nozzle according to claim 1, characterized in that: The particle size of the EOS StainlessSteel CX metal powder is >63μm.

3. The additive manufacturing method for the hot nozzle according to claim 1, characterized in that: The iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are present in the following weight percentages: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%. Carbon (C): C < 0.05%; Iron (Fe) balance.

4. The additive manufacturing method for the hot nozzle according to claim 1, characterized in that: The nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are in the following weight percentages: nickel (Ni): 2.5%; silicon (Si): 0.7%; chromium (Cr): 0.4%; copper (Cu) balance.

5. A hot nozzle manufactured by the additive manufacturing method of any one of claims 1-4, characterized in that: The nozzle body (1) includes a nozzle tip (2) on one end of the nozzle body (1). The nozzle tip (2) and the nozzle body (1) are formed separately. The nozzle body (1) is formed by processing at least beryllium copper material. The nozzle tip (2) is formed by 3D printing laser cladding of metal mixed powder. The other end of the nozzle body (1) is provided with a first part (3) formed by 3D printing laser cladding of metal mixed powder.

6. The hot nozzle according to claim 5, characterized in that: The metal mixed powder includes EOSStainlessSteel CX metal powder and AMPCOLOY940 metal powder; The EOS StainlessSteel CX metal powder is composed of at least iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C). The particle size of the EOS StainlessSteel CX metal powder is >63μm; The iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), aluminum (Al), manganese (Mn), silicon (Si), and carbon (C) are present in the following weight percentages: Chromium (Cr): 11% < Cr < 13%; Nickel (Ni): 8.4% < Ni < 13%; Molybdenum (Mo): 1.1% < Mo < 1.7%; Aluminum (Al): 1.2% < Al < 2%; Manganese (Mn): Mn < 0.4%; Silicon (Si): Si < 0.4%; Carbon (C): C < 0.05%; Iron (Fe) balance. The AMPCOLOY940 metal powder is a copper alloy composed of at least nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu). The nickel (Ni), silicon (Si), chromium (Cr), and copper (Cu) are in the following weight percentages: nickel (Ni): 2.5%; silicon (Si): 0.7%; chromium (Cr): 0.4%; copper (Cu) balance.

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