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Austenitic stainless steel forging and production process thereof

A technology of austenitic stainless steel and production technology, which is applied in the field of forgings and its production technology, can solve the problems of less research on grain size control, low strength, tensile strength and high yield strength that cannot be effectively improved, and achieve improved Effect of tempering stability, good corrosion resistance, and good toughness

Active Publication Date: 2013-06-12
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, there were many domestic studies on the microstructure control of stainless steel forging forming, but there were few studies on the microstructure and grain size control of forging billet rolling forming, that is, the forging and rolling forming process.
Austenitic stainless steel has high corrosion resistance, good cold workability and good toughness, plasticity, weldability and non-magnetism, but the general strength is low, and the tensile strength and high yield strength cannot be effectively improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is an austenitic stainless steel forging, the mass percentage of chemical composition is: C: 0.1%, Si: 0.6%, Mn: 0.9%, P: 0.01%, S: 0.004%, Cr: 18.6%, Ni : 9.4%, Mo: 0.1%, Nb: 0.06%, V: 0.07%, Ti: 0.005%, B: 0.005%, Al: 0.007%, lanthanide rare earth: 0.007%, the balance is Fe; The mass percentage of components is: lanthanum: 36%, cerium: 14%, europium: 10%, terbium: 10%, gadolinium: 15%, praseodymium: 5%, holmium: 4%, erbium: 5%, and the rest of the lanthanides :1%.

[0026] The production process of the austenitic stainless steel forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment - ring rolling - tempering - cooling - physical and chemical inspection - ultrasonic flaw detection - cleaning - packaging;

[0027] In the heating process, the heating temperature is 1110° C., and the time is 1 hour;

[0028] In the heat treatment process, section heating is adopted...

Embodiment 2

[0033] In this embodiment, an austenitic stainless steel forging, the mass percentage of chemical composition is: C: 0.2%, Si: 0.7%, Mn: 1%, P: 0.008%, S: 0.003%, Cr: 18.7%, Ni: 9.5%, Mo: 0.2%, Nb: 0.07%, V: 0.08%, Ti: 0.006%, B: 0.006%, Al: 0.008%, lanthanide rare earth: 0.008%, the balance is Fe; the group of lanthanide rare earth The mass percentages are: lanthanum: 40%, cerium: 15%, europium: 5%, terbium: 12%, gadolinium: 10%, praseodymium: 9%, holmium: 5%, erbium: 2%, and other lanthanides: 2%.

[0034] The production process of the austenitic stainless steel forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment - ring rolling - tempering - cooling - physical and chemical inspection - ultrasonic flaw detection - cleaning - packaging;

[0035] In the heating process, the heating temperature is 1120°C, and the heating time is 3 hours;

[0036] In the heat treatment process, secti...

Embodiment 3

[0041] This example is an austenitic stainless steel forging, the mass percentage of its chemical composition is: C: 0.3%, Si: 0.8%, Mn: 1.1%, P: 0.01%, S: 0.002%, Cr: 18.8%, Ni: 9.6%, Mo: 0.3%, Nb: 0.08%, V: 0.09%, Ti: 0.007%, B: 0.007%, Al: 0.009%, lanthanide rare earth: 0.009%, the balance is Fe; lanthanide rare earth The mass percentages of the components are: lanthanum: 25%, cerium: 6%, europium: 8%, terbium: 13%, gadolinium: 22%, praseodymium: 6%, holmium: 9%, erbium: 10%, and the rest of the lanthanum series Elements: 1%.

[0042] The production process of the austenitic stainless steel forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment - ring rolling - tempering - cooling - physical and chemical inspection - ultrasonic flaw detection - cleaning - packaging;

[0043] In the heating process, the heating temperature is 1130° C. and the heating time is 5 hours;

[0044] In th...

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Abstract

The invention discloses an austenitic stainless steel forging. The austenitic stainless steel forging comprises the following chemical components in percentage by weight: 0.1-0.3% of C, 0.6-0.8% of Si, 0.9-1.1% of Mn, less than 0.015% of P, less than 0.005% of S, 18.6-18.8% of r, 9.4-9.6% of Ni, 0.1-0.3% of Mo, 0.06-0.08% of Nb, 0.07-0.09% of V, 0.005-0.007% of Ti, 0.005-0.007% of B, 0.007-0.009% of Al, 0.007-0.009% of lanthanum rare earth and the balance of Fe. According to the production process, the stainless steel forging acquires small and complete austenite structures with high dislocation density, so that good corrosion resistance, cold-workability and toughness are achieved; and meanwhile, the stainless steel forging has high tensile strength and high yield strength.

Description

technical field [0001] The invention relates to a forging and its production process, in particular to an austenitic stainless steel forging and its production process. Background technique [0002] The development of stainless steel has a history of nearly 100 years. With the expansion of the use of stainless steel and the continuous increase of varieties, its performance is also expanding, and the requirements for quality of use are constantly improving. The current problem to be solved for stainless steel is how to solve the thermal stability of the material and the deterioration of post-welding and thermal processing, thermoforming plasticity, toughness and corrosion resistance caused by the increase of chromium and molybdenum content. In the past, there were many domestic studies on the microstructure control of stainless steel forging forming, but there were few studies on the microstructure and grain size control of forging billet rolling forming, that is, the forging...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D8/00
Inventor 是玉丰
Owner WUXI PAIKE HEAVY CASTING & FORGING
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