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A method of improving the strength of b50a789g stainless steel material

A technology of B50A789G and stainless steel, applied in the direction of furnace types, furnaces, heat treatment furnaces, etc., can solve the problems of low strength of B50A789G stainless steel materials, achieve low production costs, reduce production costs, and improve strength

Active Publication Date: 2016-05-25
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above problems, the present invention provides a method for improving the strength of B50A789G stainless steel materials, which can solve the problem of low strength of B50A789G stainless steel materials after conventional quenching and air cooling heat treatment methods

Method used

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  • A method of improving the strength of b50a789g stainless steel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Put the B50A789G stainless steel material or the B50A789G stainless steel material blade into the common quenching basket evenly, then put the quenching material basket into the quenching furnace to heat and keep it warm, and then put the B50A789G stainless steel material or B50A789G stainless steel blade Put it into a water tank filled with cooling water for water cooling treatment. The temperature of the cooling water in the water tank is 0 ° C. The B50A789G stainless steel material or the B50A789G stainless steel material blade is kept in the water tank for 4 hours.

Embodiment 2

[0009] Put the B50A789G stainless steel material or the B50A789G stainless steel material blade into the common quenching basket evenly, then put the quenching material basket into the quenching furnace to heat and keep it warm, and then put the B50A789G stainless steel material or B50A789G stainless steel blade Put it into a water tank filled with cooling water for water cooling treatment. The temperature of the cooling water in the water tank is 26°C. B50A789G stainless steel materials or B50A789G stainless steel blades are kept in the water tank for 2 hours.

Embodiment 3

[0011] Put the B50A789G stainless steel material or the B50A789G stainless steel material blade into the common quenching basket evenly, then put the quenching material basket into the quenching furnace to heat and keep it warm, and then put the B50A789G stainless steel material or B50A789G stainless steel blade Put it into a water tank filled with cooling water for water cooling treatment. The temperature of the cooling water in the water tank is 13°C. B50A789G stainless steel materials or B50A789G stainless steel blades are kept in the water tank for 6 hours.

[0012] Compared with the heat treatment process of air cooling after conventional quenching, the performance comparison of B50A789G stainless steel materials after adopting the above examples is shown in the following table:

[0013]

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Abstract

The invention provides a method for improving strength of B50A789G stainless steel materials. The method can solve the problem of low strength of the B50A789G stainless steel materials after the conventional air-cooling thermal treatment method after quenching is adopted. The B50A789G stainless steel materials or the B50A789G stainless steel material blades are evenly put into a universal quenching material basket, and then the quenching material basket is put into a quenching heating furnace to keep warm after being heated; the B50A789G stainless steel materials or the B50A789G stainless steel material blades are cooled. The method is characterized in that cooling treatment is water-cooling treatment; the B50A789G stainless steel materials or the B50A789G stainless steel material blades are put into a water tank and kept for 2-6 hours; the temperature of cooling water inside the water tank is 0-26 DEG C.

Description

technical field [0001] The invention relates to the field of heat treatment technology for blades of B50A789G-like martensitic precipitation-hardening stainless steel material, in particular to a method for improving the strength of B50A789G-like stainless steel material. Background technique [0002] Turbine blades and compressor blades often have low strength after heat treatment, which will cause the important performance indicators of steam turbine blades and compressor blades to fail to meet the technical requirements, resulting in low strength of the blades during adjustment and operation. Fatigue cracks and early damage to the blades are serious, and they are not allowed to appear in the use of steam turbine blades and compressor blades. Existing B50A789G stainless steel steam turbine blades and compressor blades adopt the heat treatment process of air cooling after quenching by conventional methods. Due to the low cooling rate of air cooling, the residual austenite o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D6/00C21D9/00
Inventor 夏冰
Owner WUXI TURBINE BLADE
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