A kind of preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot rolling mill roll ring

A cermet and titanium carbonitride technology, which is applied in the field of preparation of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot rolling mill roll rings, can solve the problems of high brittleness, low material hardness and grain size. Coarse and other problems, to achieve the effect of high density, simple composition and low production cost

Active Publication Date: 2020-11-10
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite roll ring has low cost and good wear resistance, but the hard phase in the cermet roll ring is formed in situ, usually the grain is coarse, the material hardness is not high, and the brittleness is relatively high

Method used

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  • A kind of preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot rolling mill roll ring
  • A kind of preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot rolling mill roll ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A multiphase TiB 2 The preparation method of / Ti(C,N)-stainless steel cermet hot-rolled roll ring, the preparation sequence includes the steps of mixing materials, wet grinding, drying, molding, vacuum solid phase sintering, machining, and high temperature liquid phase sintering, as follows:

[0031] (1) Mixing material: select commercially available TiB with a purity of not less than 99% 2 , Ti(C,N) (titanium carbonitride), Fe, Ni, Cr, Mn, Si and C powder mixed, each component according to mass percentage is TiB 2 : 1%, Ti(C,N): 74%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175%;

[0032] (2) Ball milling: Put the mixed raw materials into a ball milling tank, add 2% absolute ethanol as a medium, vacuumize the ball milling tank and fill it with argon, the mass ratio of balls to materials is 10:1 , the ball milling speed is 300r / min, and the ball milling time is 20h;

[0033] (3) Drying: Put the ball-milled slurry in a rotary evaporator, fir...

Embodiment 2

[0041] a TiB 2 The preparation method of / Ti(C,N)-stainless steel cermet hot-rolled roll ring, the preparation sequence includes the steps of mixing materials, wet grinding, drying, molding, vacuum solid phase sintering, machining, and high temperature liquid phase sintering, as follows:

[0042] (1) Mixing material: select TiB with a purity of not less than 99% 2 , Ti(C,N), Fe, Ni, Cr, Mn, Si and C powder mixed, each component is TiB according to mass percentage 2 : 5%, Ti(C,N): 70%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175%;

[0043] (2) Ball milling: Put the mixed raw materials into a ball milling tank, add 2% absolute ethanol as a medium, vacuumize the ball milling tank and fill it with argon, the mass ratio of balls to materials is 10:1 , the ball milling speed is 300r / min, and the ball milling time is 10h;

[0044] (3) Drying: Put the ball-milled slurry in a rotary evaporator, first vacuum, the air pressure drops to 0.09MPa and starts to...

Embodiment 3

[0051] a TiB 2 The preparation method of / Ti(C,N)-stainless steel cermet hot-rolled roll ring, the preparation sequence includes the steps of mixing materials, wet grinding, drying, molding, vacuum solid phase sintering, machining, and high temperature liquid phase sintering, as follows:

[0052] (1) Mixing step: select TiB with a purity of not less than 99% 2 , Ti(C,N), Fe, Ni, Cr, Mn, Si and C powder mixed, each component is TiB according to mass percentage 2 : 10%, Ti(C,N): 65%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175%;

[0053] (2) Ball milling step: put the mixed raw materials into a ball mill jar, add 2% absolute ethanol as a medium, vacuumize the ball mill jar and fill it with argon, the mass ratio of balls to material is 10: 1. The ball milling speed is 300r / min, and the ball milling time is 10h;

[0054] (3) Drying step: put the ball-milled slurry in a rotary evaporator, first vacuum, the air pressure drops to 0.09MPa and starts to h...

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Abstract

A preparation method for a multiphase titanium diboride / titanium carbonitride-stainless steel metal ceramic hot mill roll ring comprises the following steps: uniformly mixing TiB2, Ti(C,N), Fe, Ni, Cr, Mn, Si and C powder according to weight percentages, and then carrying out web grinding, drying and sieving under protection of argon to obtain powder; placing the powder in a metal mold and carrying out compression molding to obtain a blank in the shape of a roll ring; carrying out solid phase sintering on the blank in the shape of a roll ring at first to obtain a hot mill roll ring preform; machining the hot mill roll ring preform to obtain a roll ring with the required size; and sintering the machined hot mill roll ring preform at high temperature to obtain the titanium diboride / titaniumcarbonitride-stainless steel metal ceramic hot mill roll ring. The process is easy to operate, prepared metal ceramic ingredients are simple, the multiphase titanium diboride / titanium carbonitride-stainless steel metal ceramic hot mill roll ring does not contain strategic scarce resources such as W and Co, the content of Ni is small, the cost is low, and the multiphase titanium diboride / titanium carbonitride-stainless steel metal ceramic hot mill roll ring has good wear resistance, and is long in service life, light in weight and suitable for industrial promotion.

Description

technical field [0001] The invention belongs to a cermet roll ring of a hot rolling mill, in particular to a method for preparing a multiphase titanium diboride / titanium carbonitride-stainless steel cermet roll ring. Background technique [0002] Cermets are widely used in the field of industrial wear resistance due to their high hardness, high temperature resistance, good wear resistance and corrosion resistance. With Ti(C,N) and TiB 2 Composite hard phase cermets with ceramics as the hard phase usually have fine grains, excellent mechanical properties, good wear resistance and high temperature oxidation resistance, and are new materials for preparing high-speed hot rolling rolls. [0003] At present, the cemented carbide roller rings used in hot rolling mills are made of two components of WC and Co by hot pressing and sintering. The disadvantage of this kind of roller rings is that they use a large amount of strategic scarce elements such as W and Co, which are expensive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/02C22C1/05B22F5/10
CPCB22F5/106C22C1/051C22C29/005C22C29/02
Inventor 李烨飞何林高义民刘志伟郑巧玲霍旭旭
Owner XI AN JIAOTONG UNIV
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