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Continuous rolling roll and its preparation method

A roll and roll body technology, which is applied in the field of continuous roll and its preparation, can solve the problems of difficult control of quality stability and achieve the effects of increasing service life, reducing hardness drop, and increasing the thickness of the working layer

Active Publication Date: 2021-02-19
长沙金铎机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the continuous rolling section of the first new three-roll mill in China adopts the infinitely chilled materials similar to pearlite and acicular body provided by German SMS Siemag. Although the hardness drop is low, the quality is stable during the production process. It is not easy to control, and it is prone to roll breakage and hole bottom hardness problems during use

Method used

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  • Continuous rolling roll and its preparation method

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Effect test

Embodiment 1

[0024] The continuous rolling roll in this embodiment includes a roll body, a journal on the transmission side, and a shaft head, and the roll body, the journal, and the shaft head are cast into an integral structure using hot-working die steel, and the hot-working die steel includes the following alloy Elements: C: 0.65%, Si: 0.30%, Mn: 0.5%, Cr: 5.3%, Ni: 1.5%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance.

[0025] The preparation method of the described continuous rolling roll of the present embodiment comprises the following steps:

[0026] Step 1, batching smelting: the composition of the hot work die steel is proportioned according to the following weight percentages: C: 0.65%, Si: 0.30%, Mn: 0.5%, Cr: 5.3%, Ni: 1.5%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance, smelting in an electric furnace after batching, and refining to obtain pure molten steel with qualified components;

[0027] Step 2, molding: After the molten steel is smelted to meet the requirements, it is taken out of...

Embodiment 2

[0033] The continuous rolling roll in this embodiment includes a roll body, a journal on the transmission side, and a shaft head, and the roll body, the journal, and the shaft head are cast into an integral structure using hot-working die steel, and the hot-working die steel includes the following alloy Elements: C: 0.70%, Si: 0.35%, Mn: 0.5%, Cr: 5.30%, Ni: 1.7%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance.

[0034] The preparation method of the described continuous rolling roll of the present embodiment comprises the following steps:

[0035] Step 1, batch smelting: the composition of the hot work die steel is proportioned according to the following weight percentages: C: 0.70%, Si: 0.35%, Mn: 0.5%, Cr: 5.30%, Ni: 1.7%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance, smelting in an electric furnace after batching, and refining to obtain pure molten steel with qualified components;

[0036] Step 2, molding: After the molten steel is smelted to meet the requirements, it is taken out of ...

Embodiment 3

[0042] The continuous rolling roll in this embodiment includes a roll body, a journal on the transmission side, and a shaft head, and the roll body, the journal, and the shaft head are cast into an integral structure using hot-working die steel, and the hot-working die steel includes the following alloy Elements: C: 0.70%, Si: 0.35%, Mn: 0.5%, Cr: 4.90%, Ni: 1.7%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance.

[0043] The preparation method of the described continuous rolling roll of the present embodiment comprises the following steps:

[0044] Step 1, batch smelting: the composition of the hot work die steel is proportioned according to the following weight percentages: C: 0.70%, Si: 0.35%, Mn: 0.5%, Cr: 4.90%, Ni: 1.7%, Mo: 0.30%, P≤0.03%, S≤0.03%, Fe balance, smelting in an electric furnace after batching, and refining to obtain pure molten steel with qualified components;

[0045] Step 2, molding: After the molten steel is smelted to meet the requirements, it is taken out of ...

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Abstract

The invention relates to a continuous rolling roll, which includes a roll body, a shaft journal and a shaft head on the transmission side, and the roll body, the journal, and the shaft head are all cast into an integral structure using hot-working die steel, and the hot-working die steel includes The following alloying elements: C: 0.6-1.2%, Si: 0.2-0.6%, Mn: 0.3-0.5%, Cr: 4.0-6.5%, Ni: 1.4-2%, Mo: 0.3-0.5%, P≤0.03% , S≤0.03%, Fe balance, the preparation method of the continuous roll comprises the following steps: Step 1, batching smelting; Step 2, molding; Step 3, heat treatment for the first time; Step 4, rough processing; Step 5, the second Secondary heat treatment; step six, finishing. The invention makes full use of the good hardenability of the hot work die steel to increase the thickness of the working layer, reduce the hardness drop and increase the service life of the product.

Description

technical field [0001] The invention relates to the technical field of continuous rolling rolls and sizing roll rings of seamless steel pipe rolling mills, in particular to a continuous rolling roll and a preparation method thereof. Background technique [0002] With the rapid development of my country's steel rolling machinery and equipment, the structure of the rolling mill and the variety of rolled materials have undergone great changes. At present, the continuous rolling section of the first new three-roll mill in China adopts the infinitely chilled materials similar to pearlite and acicular body provided by German SMS Siemag. Although the hardness drop is low, the quality is stable during the production process. It is not easy to control, and it is easy to break the roll and the hardness of the bottom of the hole during use. Especially with the development of the national economy and the improvement of people's living standards, no matter the types and materials of rol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44B22C9/22B23P15/00C21D9/38C22C33/04
CPCB22C9/22B23P15/00C21D9/38C22C33/04C22C38/02C22C38/04C22C38/44
Inventor 周建明
Owner 长沙金铎机械有限公司
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