Steel 27Cr2Ni3SiMn2Mo for spinner roller and preparation technology thereof

A preparation process and margin technology, applied in the field of metallurgy, can solve problems such as low-temperature brittle fracture, achieve uniform hardness, improve macro and micro structures, and achieve compact structures

Inactive Publication Date: 2013-02-27
SHANDONG YUANDA MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of steel 27Cr2Ni3SiMn2Mo and its preparation process for spinner rollers, to solve the reasons of the material performance in the prior art. Under the action of additional tensile stress, brittle cracking tends to occur, especially when the strength of these materials is too high, they are more likely to have low-temperature brittle fracture tendencies when they are served in a low-temperature environment.

Method used

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  • Steel 27Cr2Ni3SiMn2Mo for spinner roller and preparation technology thereof
  • Steel 27Cr2Ni3SiMn2Mo for spinner roller and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take the steel 27Cr2Ni3SiMn2Mo for making Φ145×145 iron driller spinner roller as an example:

[0039] The chemical composition ratio of steel 27Cr2Ni3SiMn2Mo for iron driller spinner roller is C: 0.27%; Si: 1.78%; Mn: 1.80%; Cr: 1.78%; Mo: 0.53%; V: 0.18%; Ni: 3.15%; S: 0.005%; P: ≤.005%; Fe: balance.

[0040] Concrete preparation process steps are as follows:

[0041] (1) Intermediate frequency smelting:

[0042] First, use basic furnace lining material to dry for 3 hours, and the temperature is controlled at 450°C. Then, according to the above chemical composition formula, it is put into the intermediate frequency induction furnace. Controlled at 1550°C, the cast electrode ingot is transferred to the next step for use;

[0043] (2) Refining:

[0044] Electroslag remelting is carried out on the electrode ingot prepared above, and the main process parameters of its refining are as follows:

[0045] a. The proportion of slag system used in this implementation proce...

Embodiment 2

[0062] Take the steel 27Cr2Ni3SiMn2Mo for making Φ140×140 iron driller spinner roller as an example:

[0063] The chemical composition ratio used is C: 0.29%; Si: 1.85%; Mn: 1.85%; Cr: 1.9%; Mo: 0.57%; V: 0.2%; Ni: 3.3%; S: 0.01%; P: 0.01%; Fe: balance.

[0064] The concrete steps of this embodiment are as follows:

[0065] (1) Intermediate frequency smelting:

[0066] First, use basic furnace lining materials to dry for 4 hours, and the temperature is controlled at 480°C. Then, according to the above chemical composition formula, put them into the intermediate frequency induction furnace. Controlled at 1580°C, the cast electrode ingot is transferred to the next step for use;

[0067] (2) Refining:

[0068] Electroslag remelting is carried out on the electrode ingot prepared above, and the process parameters are as follows:

[0069] a. The ratio of the four-element slag system is alumina 27%; calcium oxide 27%; calcium fluoride 27%; silicon oxide 19%;

[0070] b. The vol...

Embodiment 3

[0086] Take the steel 27Cr2Ni3SiMn2Mo for making Φ155×160 iron driller spinner roller as an example:

[0087] The chemical composition ratio used is C: 0.32%; Si: 1.95%; Mn: 1.95%; Cr: 2.05%; Mo: 0.62%; V: 0.25%; Ni: 3.50%; S: 0.02%; P: 0.02%; Fe: balance.

[0088] The concrete steps of this embodiment are as follows:

[0089] (1) Intermediate frequency smelting:

[0090] First, use basic furnace lining materials to dry for 5 hours, the temperature is controlled at 500 ° C, and then the ingredients are formulated according to the above chemical composition, and put into the intermediate frequency induction furnace. Controlled at 1600°C, the cast electrode ingot is transferred to the next step for use;

[0091] (2) Refining (electroslag remelting):

[0092] Electroslag remelting is carried out on the electrode ingot prepared above, and the process parameters are as follows:

[0093] a. The ratio of the four-element slag system is alumina 30%; calcium oxide 30%; calcium flu...

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Abstract

The invention discloses steel 27Cr2Ni3SiMn2Mo for a spinner roller and a preparation technology thereof, and belongs to the technical field of process metallurgy. The steel 27Cr2Ni3SiMn2Mo comprises: by weight, 0.26 to 0.32% of C, 1.75 to 1.95% of Si, 1.75 to 1.95% of Mn, 1.75 to 2.05% of Cr, 0.52 to 0.62% of Mo. 0.15 to 0.25% of V, 3.10 to 3.50% of Ni, less than or equal to 0.02% of S, less than or equal to 0.02% of P and the balance Fe. The preparation technology comprises intermediate-frequency smelting, refining, forging, machining, air quenching and tempering. The preparation technology adopts an electroslag remelting technology, realizes material secondary refining, reduces content of nonmetal impurities and harmful gas, and improves a macroscopic structure and a microstructure of a material. The steel 27Cr2Ni3SiMn2Mo obtained by the preparation technology comprises uniform chemical components, has a compact microstructure, uniform hardness, good impact toughness and no decarburized layer on the surface. The preparation technology improves material integrated performances.

Description

technical field [0001] The invention belongs to the technical field of metallurgy technology. Background technique [0002] With the acceleration of the modern drilling process, the degree of automation of drilling equipment is constantly improving, and the torque spinner equipment of drilling tools is also constantly being upgraded, from the original manual lifting tong to the hydraulic-pneumatic hybrid tong to the most advanced iron tong. Drillers have been widely used in oil machinery developed countries in Europe and the United States to perform drilling operations on various drilling platforms on land and in the sea and in different field environments, and have played an important role in improving production efficiency, reducing labor intensity, and improving safety. At present, domestic research on iron drilling equipment is still in its infancy, and products independently developed by individual manufacturers have been introduced to the market, but the key technologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/04B22D23/10C21D8/00
Inventor 曹衍学王波
Owner SHANDONG YUANDA MATERIAL TECH CO LTD
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