Method for controlling size uniformity of hot rolled high-carbon austenitic stainless steel grains

A technology of carbon austenite and grain size, which is applied in the field of controlling the uniformity of grain size of hot-rolled high-carbon austenitic stainless steel, can solve the problem of deteriorating mechanical properties and corrosion resistance, deteriorating high-temperature strength and fatigue properties of materials, and no Discuss issues such as the uniformity of the thickness of the structure to achieve the effects of strong operability, avoiding carbide precipitation, and avoiding abnormal growth of grains
CN110724809AActive Publication Date: 2020-01-24NORTHEASTERN UNIV
5 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEASTERN UNIV
Publication Date
2020-01-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for controlling the size uniformity of hot rolled high-carbon austenitic stainless steel grains. The method comprises the following steps: 1, preparing a high-carbon austenitic stainless steel hot rolled medium plate; 2, putting the medium plate in a heating furnace of 900-920 DEG C for preheating, wherein the preheating time t1 is equal to 0.4-0.6 hour; 3, raisingthe temperature of the preheated plate to 1000-1010 DEG C along with the furnace for recrystallization treatment, or taking the preheated plate out for slow cooling, warming the heating furnace to 1000-1010 DEG C, and then putting the preheated plate in the heating furnace for recrystallization treatment; 4, raising the temperature of the recrystallization plate by 50-100 DEG C along with the furnace for solution treatment, or taking the recrystallization plate out for slow cooling, raising the temperature of the heating furnace by 50-90 DEG C, and then putting the recrystallization plate inthe heating furnace for solution treatment; and 5, carrying out water quenching on a solid solution plate to the normal temperature. According to the method, the recrystallization kinetics and the thermodynamics are taken as the acting points, the multi-stage stepped type annealing technology is adopted to release deformation stored energy step by step, the medium plate with uniform grains and adjustable and controllable grain size is obtained, the maneuverability is high, and industrial application can be realized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of iron and steel alloy materials, in particular to a method for controlling the grain size uniformity of hot-rolled high-carbon austenitic stainless steel. Background technique

[0002] For austenitic stainless steels with special requirements, such as austenitic stainless steels for nuclear power fast reactors, they have long-term service in harsh high-temperature environments and have high requirements for microstructures. They want to obtain stable austenitic microstructures and require better mechanical properties. and high temperature performance, generally more C elements are added; high-carbon (C content is about double that of conventional) austenitic stainless steel generally has a stable single-phase austenite structure, and the grain size and uniformity can only be obtained through recrystallization Behavioral control; however, due to the sensitive diffusion of C with temperature changes and the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More