Preparation method of A100 ultrahigh-strength steel wire for additive manufacturing

A technology of additive manufacturing and ultra-high-strength steel, applied in the field of metal material processing

Inactive Publication Date: 2019-09-20
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relevant domestic technical teams have started to carry out research on the preparation of A100 steel components using the method of arc + wire additive manufacturing. However, the A10

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The steps of the preparation method of the A100 ultra-high-strength steel wire for additive manufacturing are as follows:

[0026] 1. Forging: Put the A100 steel ingot into the furnace for heat treatment at 700°C, then raise the temperature to 1000°C with the furnace, and keep it for 60 minutes. After the heat preservation is over, the steel ingot is quickly taken out from the high temperature furnace and placed on the forging machine workbench, and the transfer interval is 20s. The starting forging temperature is 980°C, the final forging temperature is 850°C, and a forged bar with a diameter of 45mm is obtained;

[0027] 2. Rolling: put the forged A100 steel bar into the furnace at 900°C, hold it for 30 minutes, and then roll it. The rolling start temperature is 980°C, and the final rolling temperature is 800°C to obtain a wire rod with a diameter of 8.5mm;

[0028] 3. Stress relief annealing: heat the rolled wire rod at 680°C, keep it warm for 120min, and then air co...

Embodiment 2

[0034] The steps of the preparation method of the A100 ultra-high-strength steel wire for additive manufacturing are as follows:

[0035] 1. Forging: Put the A100 steel ingot into the furnace for heat treatment at 800°C, then raise the temperature to 980°C with the furnace, and keep it for 60 minutes. After the heat preservation is over, the steel ingot is quickly taken out from the high-temperature furnace and placed on the forging machine workbench, and the transfer interval is 25s. The starting forging temperature is 950°C, the final forging temperature is 840°C, and a forged bar with a diameter of 45mm is obtained;

[0036] 2. Rolling: put the forged A100 steel bar into the furnace at 900°C, hold it for 40 minutes, and then roll it. The rolling start temperature is 980°C, and the final rolling temperature is 800°C to obtain a wire rod with a diameter of 9.0mm;

[0037] 3. Stress relief annealing: heat the rolled wire rod at 680°C, keep it warm for 120min, and then air coo...

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Abstract

The invention provides a preparation method of an A100 ultrahigh-strength steel wire for additive manufacturing. The method is characterized in that an A100 ultrahigh-strength steel ingot is forged and rolled to prepare a bar with high surface quality; and the bar with high surface quality is subjected to drawing pulling and surface treatment in a plurality of times through special technologies so as to obtain the special A100 ultrahigh-strength steel wire for additive manufacturing. According to the method, the special drawing and pulling technology and the special surface treatment technology are carried out to successfully prepare the special high-quality A100 ultrahigh-strength steel wire for additive manufacturing, and the wire can be massively produced with high quality; the wire is applicable to the fields such as the fields of electric arc additive manufacturing, electronic beam additive manufacturing and ultrahigh-strength steel welding; and the wire has a wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing A100 ultra-high-strength steel wire for additive manufacturing, and relates to the field of metal material processing. Background technique [0002] With the rapid development of the aviation industry, in order to meet the extremely stringent weight-strength ratio and fracture toughness requirements of aerospace structural parts, the American Carpenter Company developed a new type of high Co-Ni ultra-high strength based on the AF1410 alloy ratio. Steel—A100 steel, the tensile strength of the steel is 1930-2070MPa, and the fracture toughness is not less than 110MPa.m 1 / 2 Therefore, A100 steel has quickly become the material of choice for manufacturing aircraft landing gear, piston rods, torsion arms and other important load-bearing parts in the aviation field due to its ultra-high strength and excellent fracture toughness. [0003] A100 steel is a Fe-Co-Ni alloy strengthened by C, Cr, and Mo. The alloying...

Claims

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Application Information

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IPC IPC(8): B21C37/04
CPCB21C37/047
Inventor 郑涛施瀚超乔燕琦
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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