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Hydrogen sulfide resistant stainless steel forge piece for oil exploitation operation and preparation method of hydrogen sulfide resistant stainless steel forge piece

A technology for oil extraction and resistance to hydrogen sulfide, which is applied in manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc. It can solve problems such as product standards that have not yet been formulated, and achieve improved anti-corrosion performance, improved welding performance and cold bending. performance, the effect of improving toughness and plasticity

Active Publication Date: 2021-10-22
JIANGYIN HENGYE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country has only listed material grades in GB20878, and has not formulated product standards

Method used

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  • Hydrogen sulfide resistant stainless steel forge piece for oil exploitation operation and preparation method of hydrogen sulfide resistant stainless steel forge piece
  • Hydrogen sulfide resistant stainless steel forge piece for oil exploitation operation and preparation method of hydrogen sulfide resistant stainless steel forge piece
  • Hydrogen sulfide resistant stainless steel forge piece for oil exploitation operation and preparation method of hydrogen sulfide resistant stainless steel forge piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Raw material procurement: purchase F6NM stainless steel ingots as raw materials;

[0058] (2) Performance testing: Carry out re-testing of chemical composition of raw materials, take qualified products as raw materials, the weight percentage of each element component in raw materials is: C: 0.015%, Si: 0.45%, Mn: 0.56%, P: 0.022 %, S: 0.001%, Ni: 3.80%, Cr: 12.30%, Mo: 0.54%, N: 0.018%, Al: 0.005%, Cu: 0.06%, Co: 0.065%, and the balance is Fe;

[0059] (3) Forging:

[0060] Take the raw materials that have passed the re-inspection in step (2) and carry out the first fire forging. The first fire forging process is: the initial forging temperature is 1160 ° C, the final forging temperature is 800 ° C, upsetting and elongation are carried out, and the upsetting ratio is 2 , the drawing length ratio is 2, upsetting, chamfering, punching, rounding, reaming treatment, mandrel drawing, correcting and forming, and the forging billet is obtained;

[0061] (4) Heat treatmen...

Embodiment 2

[0070] (1) Raw material procurement: purchase F6NM stainless steel ingots as raw materials;

[0071] (2) Performance testing: Carry out re-inspection of chemical composition of raw materials, take qualified products as raw materials, the weight percentage of each element component in raw materials is: C: 0.012%, Si: 0.4%, Mn: 0.60%, P: 0.024 %, S: 0.005%, Ni: 3.80%, Cr: 12.35%, Mo: 0.52%, N: 0.015%, Al: 0.008%, Cu: 0.09%, Co: 0.07%, and the balance is Fe;

[0072] (3) Forging:

[0073] Take the raw materials that pass the re-inspection in step (2) for the first fire forging, the first fire forging process is: initial forging temperature 1160 ° C, final forging temperature 850 ° C, upsetting and elongation, upsetting ratio 2.5 , the pull-out ratio is 2.5;

[0074] Put it in a furnace at 1160°C and heat it for 2.2 hours, then carry out the second fire forging. The second fire forging process is: initial forging temperature 1160°C, final forging temperature 850°C, upsetting, ch...

Embodiment 3

[0085] (1) Raw material procurement: purchase F6NM stainless steel ingots as raw materials;

[0086] (2) Performance testing: Carry out re-inspection of chemical composition of raw materials, take qualified products as raw materials, the weight percentage of each element component in raw materials is: C: 0.014%, Si: 0.47%, Mn: 0.69%, P: 0.022 %, S: 0.006%, Ni: 3.82%, Cr: 12.25%, Mo: 0.53%, N: 0.014%, Al: 0.006%, Cu: 0.08%, Co: 0.065%, and the balance is Fe;

[0087] (3) Forging:

[0088] Take the raw materials that pass the re-inspection in step (2) and carry out the first fire forging. The first fire forging process is: the initial forging temperature is 1160 ° C, the final forging temperature is 900 ° C, upsetting and elongation are carried out, and the upsetting ratio is 3 , the draw ratio is 3;

[0089] Place it in a furnace at 1160°C for heating, keep it warm for 2.5 hours, and perform the second fire forging. The second fire forging process is: initial forging temperat...

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Abstract

The invention discloses a hydrogen sulfide resistant stainless steel forge piece for oil exploitation operation and a preparation method of the hydrogen sulfide resistant stainless steel forge piece. The preparation method comprises the following steps of (1) raw material purchasing, wherein an F6NM stainless steel ingot is taken; (2) performance detection, wherein chemical components are reinspected; (3) forging, wherein multi-heating-number forging is carried out; (4) heat treatment after forging, wherein cooling and tempering are carried out; (5) rough machining, wherein cutting machining is carried out; (6) performance heat treatment, wherein solid solution, cooling and tempering are carried out; and (7) finish machining, wherein finish machining is carried out, and the stainless steel forge piece is prepared. Chemical components of the stainless steel forge piece are specifically limited, the C content is controlled to be in an ultralow state, meanwhile, the N content is controlled, phase stability is maintained, meanwhile, hardness is reduced, welding performance and H2S corrosion resistance are improved, a very small amount of Al is added, grains are refined, fatigue resistance is improved, the contents of Cr and Mo are optimized again, the equivalent ratio of Cr to Ni is optimized, corrosion resistance is remarkably improved, the stainless steel forge piece better adapts to the operation environment rich in hydrogen sulfide, the production efficiency can be remarkably improved, and the percent of pass is increased.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a hydrogen sulfide-resistant stainless steel forging for oil exploitation operations and a preparation method thereof. Background technique [0002] The use of super martensitic stainless steel F6NM (04Cr13Ni5Mo, 0Cr13Ni4Mo) is becoming more and more mature. Excellent performance in environmental applications. Our country has only included material grades in GB20878, and has not yet formulated product standards. [0003] Most of my country's own petroleum minerals contain hydrogen sulfide and other corrosive gases. The crude oil purchased from the international market in my country is also mainly heavy oil rich in hydrogen sulfide. F6NM super martensitic stainless steel has excellent performance, which can combine strength and corrosion resistance. The comprehensive performance is adjusted to the best state at the same time, which is the best choice for the occasions ric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/06B21J5/08B21K29/00C21D8/00C21D1/28
CPCB21J5/002B21J5/06B21J5/08B21K29/00C21D8/005C21D1/28C21D2261/00
Inventor 罗克伟胡强周鹏飞朱昌军
Owner JIANGYIN HENGYE FORGING
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