Co-FREE HEAT RESISTANT SINTERED MATERIAL EXCELLENT IN HIGH TEMPERATURE WEAR RESISTANCE AND HIGH TEMPERATURE STRENGTH AND MANUFACTURING METHOD THEREFOR

• Main Authors: KATO KENICHI, KEMIZAKI YUKIHIRO, MIYAHARA MASAHISA
• Format: Patent
• Language: English; Japanese
• Published: 03.08.2017
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a Co-free heat resistant sintered material capable of obtaining properties excellent both in wear resistance and strength and containing no Co in both a matrix and hard particles and a manufacturing method therefor.SOLUTION: There is provided a Co-free heart resistant sintered material excellent in high temperature wear resistance and high temperature strength and having Cr-Fe-B-based hard particles of 33 to 60 vol.% dispersed in an Fe-based alloy matrix. The manufacturing method includes adding and mixing a CrBpowder and at least one or more kinds of a CrB powder and a CrB powder with Fe-based alloy powder having average particle diameter of 5 to 15 μm and compression molding the mixed powder and sintering the same at 1150 to 1250°C.SELECTED DRAWING: Figure 1 【課題】本発明は耐摩耗性と強度の両面で優れた特性を得ることができ、基地と硬質粒子共にＣｏを含まないＣｏフリー耐熱焼結材及びその製造方法の提供を目的とする。【解決手段】本発明は、Ｆｅ系の合金基地中にＣｒ−Ｆｅ−Ｂ系の硬質粒子が３３〜６０体積％分散された高温耐摩耗性、高温強度に優れるＣｏフリー耐熱焼結材に関する。また、本発明の製造方法は、平均粒径５〜１５μｍのＦｅ系の合金粉末にＣｒＢ２粉末とＣｒ２Ｂ粉末とＣｒＢ粉末の少なくとも１種または２種以上を添加混合し、混合した粉末を圧縮成形し、１１５０〜１２５０℃で焼結することを特徴とする。【選択図】図１