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A kind of steel material used for economical MPM continuous rolling mandrel and its manufacturing method

A manufacturing method and an economical technology, applied in the field of alloy steel, can solve the problems of long manufacturing cycle, large capital occupation of inventory, and impact, and achieve the effect of reducing alloy cost, good thermal fatigue performance, and low cost ratio

Active Publication Date: 2017-11-28
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of mandrels in the world is only in the hands of a few companies, which are in a monopoly position. Not only is the price much higher than that of other similar products of H13 steel, but also its long manufacturing cycle and large inventory cost are easily affected by the international market.

Method used

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  • A kind of steel material used for economical MPM continuous rolling mandrel and its manufacturing method
  • A kind of steel material used for economical MPM continuous rolling mandrel and its manufacturing method
  • A kind of steel material used for economical MPM continuous rolling mandrel and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] According to the formula batching of table 5, control C is 0.36%, Si is 1.12%, Mn is 0.99%, P is 0.025%, S is 0.018%, Cr is 5.48%, Mo is 0.31%, Ti is 0.11%, Nb is 0.018%, B 0.0038%, and the rest are iron and unavoidable impurities.

[0049] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of ​​100mm×100mm.

Embodiment 2

[0051] According to the formula batching of table 5, control C is 0.39%, Si is 1.0%, Mn is 0.85%, P is 0.018%, S is 0.011%, Cr is 4.89%, Mo is 0.48%, Ti is 0.17%, Nb is 0.014%, B 0.0029%, and the rest are iron and unavoidable impurities.

[0052] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of ​​100mm×100mm.

Embodiment 3

[0054] According to the formula batching of table 5, control C is 0.42%, Si is 1.06%, Mn is 0.89%, P is 0.022%, S is 0.012%, Cr is 4.99%, Mo is 0.30%, Ti is 0.13%, Nb is 0.056%, B 0.0031%, and the rest are iron and unavoidable impurities.

[0055] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of ​​100mm×100mm.

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Abstract

The invention discloses a steel material used for an economical MPM continuous rolling mandrel. The steel material comprises the following components by weight percentage: C0.35-0.45%, Si0.8-1.2%, Mn0.8-1% , Cr4.8~5.5%, Mo0.3~0.5%, Ti0.1~0.2%, Nb0.02~0.08%, B0.002~0.004%, P: ≤0.03%; S: ≤0.02%, the rest are iron and impurities. The manufacturing method of the steel material is as follows: first forming a smelting electrode rod, then performing electroslag remelting on the electric shock rod to obtain an electroslag ingot, and heating and forging the electroslag ingot to form a forging billet. The proportion of chemical components in the present invention is more economical and cheap, reduces the content of Mo and V, greatly reduces the cost of the alloy, and at the same time ensures the new steel type by increasing the addition of Mn and Si elements, and micro-alloy strengthening of Ti, Nb, and B elements mechanical properties.

Description

technical field [0001] The invention belongs to the field of alloy steel, and mainly relates to a steel material used for an economical MPM continuous rolling mandrel and a manufacturing method thereof. Background technique [0002] The mandrel is one of the important tools in the rolling deformation process of the seamless steel pipe, and it is also one of the main consumable spare parts in the production process. According to the different rolling methods of steel pipes, it can be divided into floating mandrel, semi-limited mandrel and limited mandrel, and the proportion of limited mandrel is the largest. [0003] Due to the strong technicality and difficulty in manufacturing the limited motion mandrel, domestic enterprises producing large-diameter seamless steel pipes have mainly imported mandrels from abroad for many years. For example, in 2007, the import volume of mandrels in my country was about 9,000 tons. At present, the production of mandrels in the world is only ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C22C33/04
Inventor 张恒张洪奎续维
Owner 宝武特种冶金有限公司
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