| Guide is one of vulnerable parts of a large amount used in rolling mill. When rolling mill is working, surface of Guide not only contacts and moves relatively to high temperature rolling piece by a high speed, but is rushed by cooling water. After a period of time, Guide will inactive by serious abrasion groove or cracking. Frequent exchange of Guide affects greatly working efficiency, increases cost per ton steel and working strength. Finding a long life, good performance and low price of Guide is this discussion's aim.The crucial factors on Guide 's abrasion of hot continuous rolling are concluded on the basis of having studied abrasion mechanism of general wear-resistant steel. In order to exploit a new wear-resistant steel for Guide, calculation design technology of alloy that has grown up on apply of structural steel is introduced. On the basis of that, combine special performance of alloyed steel with chemical composition hardenability, a program to apply to alloyed steel that chromium and manganese are its primary hardenability alloys is writed. A new wear-resistant steel is designed according to the program.According to the new alloying composition, melting-try is done, and Guide's sample is casted Heat-Treatment, Performance test, Metalograph and Wear-resisting property contrast test are carried out The results approve mat the new alloy help to improve economic benefits due to increase Guide's life 1.6 times and reduce alloy's cost by 35 percent... |
