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Stainless steel 3D printing material with ultrahigh-temperature strength, preparation method and application

A 3D printing and stainless steel technology, applied in the field of 3D printing, can solve the problems of lower tensile strength, easy cracking and damage, and lower mechanical properties, and achieve the effect of increasing the Ms temperature point, improving stability, and reducing material deformation

Pending Publication Date: 2021-11-23
宁波匠心快速成型技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of die steel material has certain mechanical properties, its mechanical properties decline rapidly under high temperature die-casting conditions.
During the use of the mold, it is easy to crack and damage, which cannot meet the requirements of high temperature working molds
[0004] For example, the Chinese invention patent application "A 3D Printing High Wear-Resistant Stainless Steel Material, Preparation Method and Its Application", its patent application number is CN202010226803.4, discloses a 3D printing stainless steel material with good wear resistance at room temperature performance, but cannot meet the requirements of high temperature work
Another example is the Chinese invention patent "An Anti-Oxidation Hot Work Die Steel and Its Preparation Method", whose patent number is ZL201910170339.9 (authorized announcement number is CN109735777B) discloses an anti-oxidation hot work die steel, in terms of mass ratio, 0.15-0.30% of C, 10-13% of Cr, 1.0-2.5% of Ni, 1.5-3.0% of Mo, 0.5-1.5% of Co, less than 0.8% of Si, less than 0.8% of Mn, and the rest is Fe , and unavoidable trace impurities in the steel; the mold steel prepared by vacuum induction melting, homogenization treatment, heat processing, annealing and quenching and tempering treatment has high high temperature strength and oxidation resistance, and the resistance at 300 ° C The tensile strength is 1300MPa, and the tensile strength at 500°C is roughly 700MPa. It can be seen that the tensile strength at 500°C is significantly reduced, and cracking and damage are extremely prone to occur during use at high temperatures (such as 500°C). , unable to meet the high-temperature working requirements of the mould; in addition, the preparation method is complicated, there are many large-scale production processes, and the efficiency is low

Method used

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  • Stainless steel 3D printing material with ultrahigh-temperature strength, preparation method and application
  • Stainless steel 3D printing material with ultrahigh-temperature strength, preparation method and application
  • Stainless steel 3D printing material with ultrahigh-temperature strength, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The stainless steel 3D printing material with ultra-high temperature strength in this implementation is composed of 13.5wt% chromium element, 1.7wt% nickel element, 3.5wt% molybdenum element, 0.02wt% carbon element, and 21wt% cobalt element in terms of mass percentage. %, and the rest is iron.

[0026] The preparation method of the above-mentioned stainless steel 3D printing material includes the following steps in turn: Step 1): Weighing raw materials according to the above composition ratio; Step 2) Mixing the raw materials in Step 1) by vacuum smelting and gas atomization to make 3D printing stainless steel materials. The above-mentioned vacuum smelting gas atomization method (vacuum gas atomization pulverization) is a prior art, and will not be described in detail in this embodiment. The smelting temperature of the vacuum smelting gas atomization method in this example is 1600°C, the vacuum degree is 3Pa, and the atomization pressure is 3MPa; the shape of the powder...

Embodiment 2

[0034] The difference between this embodiment and above-mentioned embodiment 1 is only:

[0035]1. The composition content of the stainless steel 3D printing material is different. Specifically, the stainless steel 3D printing material in this embodiment is calculated by mass percentage, and its composition is: chromium element 14.5wt%, nickel element 2wt%, molybdenum element 3.7wt%, Carbon element is 0.02wt%, cobalt element is 22wt%, and the rest is iron element.

[0036] 2. The process parameters are different in the preparation method of the stainless steel 3D printing material, specifically, the melting temperature in step 2) is 1650°C.

[0037] After testing (ASTM G65-16), the mechanical properties of the final molded workpiece in this example at room temperature, 300°C and 500°C are specifically shown in Table 2 below.

[0038] Table 2

[0039]

[0040]

[0041] It can be seen from the above table 2 that the workpiece prepared in this example maintains high hardn...

Embodiment 3

[0043] The difference between this embodiment and above-mentioned embodiment 1 is only:

[0044] 1. The composition content of stainless steel 3D printing materials is different. Specifically, the stainless steel 3D printing material in this embodiment is calculated by mass percentage, and its composition is: chromium element 14.0wt%, nickel element 1.5wt%, molybdenum element 4.0wt% , 0.01wt% of carbon element, 20wt% of cobalt element, and the rest is iron element.

[0045] 2. The process parameters are different in the preparation method of the stainless steel 3D printing material, specifically, the melting temperature in step 2) is 1550°C.

[0046] After testing (ASTM G65-16), the mechanical properties of the final molded workpiece in this example at room temperature, 300°C and 500°C are specifically shown in Table 3 below.

[0047] table 3

[0048] temperature Hardness (HRC) Tensile strength (MPa) Yield strength (MPa) Elongation at break (%) room te...

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Abstract

The invention relates to a stainless steel 3D printing material with ultrahigh-temperature strength, a preparation method and application. The stainless steel 3D printing material with the ultrahigh-temperature strength is characterized in that the stainless steel 3D printing material comprises the following components of, in percentage by mass, 13.0-15.0% of chromium, 1.0-3.0% of nickel, 1.0-4.0% of molybdenum, 20-22% of cobalt, carbon more than 0 and less than 0.03%, and the balance iron. According to the stainless steel 3D printing material, the high-temperature tensile strength at the temperature of 500 DEG C is 1420 MPa or above, the high-temperature yield strength is 1290 MPa or above, the hardness is 46 HRC or above, and the percentage elongation after fracture is 13% or above, so that the stainless steel 3D printing material is free of cracking in a high-temperature working environment and has good plasticity and longer working life.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a stainless steel 3D printing material with ultra-high temperature strength, a preparation method and an application. Background technique [0002] Additive manufacturing (3D printing) technology is an emerging industrial manufacturing technology developed by the integration of advanced information technology, manufacturing technology and new material technology. 3D printing technology has the advantages of free design and manufacturing, functional integration advantages, personalized customization and rapid manufacturing, high utilization of materials and resources, no pollution and environmental friendliness. [0003] At present, good progress has been made in the use of 3D printing technology to produce molds. However, the internal stress of the parts in the 3D printing process is relatively large, and they are prone to deformation and cracking. At the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08B33Y70/00C22C33/04C22C38/44C22C38/52
CPCC22C38/44C22C38/52C22C38/004C22C33/04B22F9/082B33Y70/00
Inventor 邱建荣钱滨秦嬉嬉程忠辉
Owner 宁波匠心快速成型技术有限公司