PURPOSE: To provide a roll having large film thickness and superior wear resistance by forming a laminated material by combining an Fe-base base material with a coating material of high speed steel in a method for exerting thermal spraying and then hot isostatic pressing treatment.
CONSTITUTION: An Fe-base base material is preheated up to ≥600°C, and a thermal spraying material composed essentially of high speed steel is thermally sprayed on the surface of this base material by a low-pressure thermal spraying method to form a film of ≥3mm thickness. At this time, thermal spraying is carried out under the conditions of reduced pressure atmosphere of ≥2Torr partial pressure of oxygen and 20-300Torr total pressure. Then, in order to make the film layer dense, hot isostatic pressing treatment and then quench-and- temper heat treatment are performed. By using high speed steel as the thermal spraying material, the characteristics of wear resistance and hot hardness can be sufficiently produced, and also the adhesive strength of the film can be increased.
KABASAWA MAKOTO
UENO YASUHIRO
SHINPO YUKIO
OKI TERUHISA
TERAO HOSHIAKI
| JPH0288756A | 1990-03-28 | |||
| JPH02101674A | 1990-04-13 |