Steel for bucket tooth holder and bucket tooth holder manufacturing method

• Main Authors: LU SHUXIANG, ZHANG SHAOQI, WU GUOSHUN, WANG RUI, LIU JIAN
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2020
• Subjects: ALLOYS; CHEMISTRY; DREDGING; FERROUS OR NON-FERROUS ALLOYS; FIXED CONSTRUCTIONS; FOUNDATIONS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HYDRAULIC ENGINEERING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SOIL SHIFTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a bucket tooth holder. In order to solve the problems that breakage of a thin and weak part of a structure is easily caused by non-uniform distribution of strength and hardness of the existing bucket tooth holder, a manufacturing method for the bucket tooth holder is provided. The manufacturing method comprises a casting moulding step of moulding by pouring steel for the bucket tooth holder at 1,550 to 1,580 DEG C, wherein the steel for the bucket tooth holder is prepared from the following chemical components of 0.15 to 0.2 percent of C, 0.5 to 0.9 percent of Si, 1.8to 2.2 percent of Mn, 0.4 to 0.8 percent of Cr, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, and the balance of Fe and impurities, and pre-embedding the steel forcooling by using refractory sand after pouring; and a heat treatment step of rising the temperature of a cooled bucket tooth holder to 1,050 DEG C in a quenching furnace, performing water quenching at20 to 30 DEG C after heat