MANUFACTURING METHOD OF FIRE GRATE

• Main Authors: TAKAHASHI TOSHIMITSU, YAMANAKA KOICHI, RIKO ATSUSHI, HAMAGUCHI TOMOHIRO, HOSOYA RYOTA
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2023
• Subjects: ALLOYS; BLASTING; CHEMISTRY; CLEANING OR RAKING GRATES; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GRATES; HEATING; LIGHTING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

To provide a manufacturing method of a fire grate capable of greatly reducing significant wall thinning due to oxidation and decarburization on both ends of a pipe upon heat-treating a fire grate prototype in which the pipe made of carbon steel is cast in a main body of the fire grate.SOLUTION: First, a fire grate prototype 50 is manufactured in which a pipe 2 made of carbon steel is cast in a fire grate body 1 in such a manner that both ends 2a, 2b of the pipe 2 protrude from the fire grate body 1. Then, while both ends 2a, 2b of the pipe 2 are covered with a material 3 having a higher carbon content than the pipe 2, the fire grate prototype 50 is heat-treated.SELECTED DRAWING: Figure 5 【課題】炭素鋼からなる配管が火格子本体に鋳包まれた火格子原型を熱処理する際に配管の両端における酸化および脱炭による著しい減肉を大幅に軽減することができる火格子の製造方法を提供する。【解決手段】まず、火格子本体１内に炭素鋼からなる配管２が、配管２の両端２ａ，２ｂが火格子本体１から突出する状態で鋳包まれた火格子原型５０を作製する。その後、配管２の両端２ａ，２ｂを当該配管２よりも炭素含有率の大きな材料３で覆った状態で、火格子原型５０を熱処理する。【選択図】図５