Microtreatment and microstructure of carbide containing iron-based alloy

A technology of iron-based alloys and carbides, used in heat treatment equipment, manufacturing tools, quenching agents, etc., can solve problems such as reduced weldability

Active Publication Date: 2015-05-20
加里 M 科拉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Reduced weldability due to higher carbon equivalent content when austenitic tempered bainite forms in medium and high carbon steels

Method used

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  • Microtreatment and microstructure of carbide containing iron-based alloy
  • Microtreatment and microstructure of carbide containing iron-based alloy
  • Microtreatment and microstructure of carbide containing iron-based alloy

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Embodiment Construction

[0030] According to the present invention, a new method of metal treatment is disclosed which results in the transformation of low-grade iron-based alloys into high-strength steels by extremely rapid heating of the metal followed by immediate rapid quenching of the material. The resulting steel is a heterogeneous composition of at least martensite, bainite, ferrite and other structures discussed in more detail below.

[0031] In this regard, our experiments show that rapid austenitization followed by rapid quenching has demonstrated the formation of a dual hardness microstructure, as illustrated in the accompanying drawings. Experiments have shown that rapid processing of materials with the designation AISI 4130 results in multiple hardness peaks around 525 and 625 Vickers hardness. The combination of hardness has been confirmed by single sensor differential thermal analysis, which shows a transition between the two temperature ranges during a single quenching operation. In A...

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Abstract

Processes and apparatuses for micro-treating iron-based alloys to transform and / or shape them and the resulting materials obtained by treating low, medium, and high carbon steel and other iron-based alloys to form at least a mixed microstructure that may contain martensite, bainite and un-dissolved carbides, and may also contain complex steel microstructures including portions of bainite, coalesced bainite, acicular ferrite, retained austenite and / or martensite along with combinations thereof by micro-treating said iron based alloy.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 61 / 651,992 and US Utility Model Application No. 12 / 485,785, which are incorporated herein by reference. technical field [0003] The present invention relates to treated iron-based alloys, and more particularly to processes for transforming and / or forming them and the treatment of low, medium and high carbon steels and other steels by micro-treating said iron-based alloys Metal components and other iron-based alloys to form at least martensite, bainite and undissolved carbides and may also contain bainite, coalesced bainite, pearlite, ferrite, acicular ferrite Various microstructural materials obtained from the mixed microstructure of the multi-element steel microstructure of the microstructure, retained austenite and / or martensite and combinations thereof. Background technique [0004] Traditionally, metallurgists have looked to take low-qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/20C21D1/22
CPCC21D1/20C21D1/22C21D6/005C21D6/008C21D1/56C21D1/607C21D2211/001C22C38/02C22C38/04C22C38/18C21D1/18C22C38/00
Inventor 加里·M·科拉
Owner 加里 M 科拉
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