Composite overlaying manufacturing method of casting roller

A technology for casting rolls and alloy steel, applied in the field of roll manufacturing, can solve problems such as restricting the use range of continuous casting mills, shortening the service life of rolls, increasing production costs, etc., achieving easy surfacing repair, reducing production costs, and improving utilization rates. Effect

Inactive Publication Date: 2015-03-18
中冶东方工程技术有限公司秦皇岛研究设计院 +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] The above two Chinese patent documents both involve continuous casting and rolling mills, in which the casting and rolling rolls are the core equipment of the continuous casting and rolling mills, and the casting and rolling rolls are all under relatively harsh working conditions. The c

Method used

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  • Composite overlaying manufacturing method of casting roller
  • Composite overlaying manufacturing method of casting roller
  • Composite overlaying manufacturing method of casting roller

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Embodiment 1-4

[0037] figure 1 It shows the process flow of the method for manufacturing cast rolls by surfacing welding composite in one embodiment of the present invention. Such as figure 1 As shown, the steps of the surfacing welding compound manufacturing casting roll method include:

[0038] 1) 42CrMo alloy steel is used to manufacture the roll core of the embodiment of this case (the composition of 42CrMo alloy steel is listed in Table 1), the forging ratio of the substrate is controlled not less than 4:1, and the substrate is quenched and tempered, and then the surface of the substrate is treated Treatment to ensure that the surface and interior of the substrate are free of defects, and turn the surface of the substrate according to actual needs:

[0039]2) Preheat the substrate: preheat the heating rate ≤ 40°C / h, raise it to 200-300°C, keep it warm for 20-30 hours, take the substrate out of the furnace, install retaining rings on both sides of the roll substrate in the axial direct...

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Abstract

The invention discloses a composite overlaying manufacturing method of a casting roller. The method comprises the steps of 1) manufacturing a base body of the casting roller, and processing the surface of the base body; 2) preheating the base body; 3) sequentially manufacturing a bottom layer and a transition layer in the periphery of the base body by overlaying; 4) overlaying surface covering layer on the surface of the transition layer to form the casting roller, wherein the surface covering layer comprises the following chemical elements and components in percentage by mass: 0.3 to 0.8% of C, 1.0 to 4.8% of Mn, 0.4 to 6.0% of Si, 4.0 to 8.0% of Cr, 0.01 to 1.0% of Ti, 2.0 to 10% of V, 2.0 to 10.0% of W, 1.0 to 6.0% of Mo, 2.0 to 5.0% of Co, 0 to 0.4% of Ca, 0 to 0.4% of Ba, 0 to 0.5% of rare earth element, and the balance of Fe and other inevitable impurities; 5) tempering the casting roller by slowly heating and slowly cooling, wherein the tempering is performed under a temperature of 560 to 600 DEG C.

Description

technical field [0001] The invention relates to a method for manufacturing rolls, in particular to a method for manufacturing rolls with low speed, high temperature and large rolling force. Background technique [0002] As an important branch in the field of welding, surfacing composite manufacturing is a surface technology treatment process, which is a process of depositing a layer of materials with certain properties on the surface of parts by welding. The surfacing composite manufacturing process has been well developed and applied in the field of rolls, especially the repair of hot rolls. It is found through research that surfacing welding on the surface of the roll can significantly prolong the service life of the roll and reduce the consumption of rolling steel. Generally, medium-carbon alloy steel is used as the base material of the surfacing composite roll, which has ideal strength and toughness after the matrix quenching and tempering treatment. In addition, the op...

Claims

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Application Information

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IPC IPC(8): B23K31/00
CPCB23K9/048C22C38/002C22C38/005C22C38/02C22C38/04C22C38/18C22C38/22C22C38/24C22C38/28C22C38/30C22C38/34C22C38/38
Inventor 查显文王清宝刘文武马会文樊有勤张浩阎军王艳彪眭向荣王立志
Owner 中冶东方工程技术有限公司秦皇岛研究设计院
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