Heat treatment method for gadder shank
A heat treatment method and rock drilling machine technology, applied to heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as short fatigue life, damage to the end face of the tail, and fracture of the shank shank, and achieve the goal of improving crack resistance and fatigue life Effect
Inactive Publication Date: 2017-09-15
桂林方兴机械有限公司
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Problems solved by technology
[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem solved by the present invention is how to solve the defects that the shank tail is prone to breakage during use, the end face of the tail is damaged, the thread is worn, and the fatigue life is short
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[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, which are not intended to limit the present invention.
[0014] figure 1 Shown is the technical process of the present invention, a method for heat treatment of rock drill shanks, comprising the steps of:
[0015] (1) Carburizing and direct quenching: Under the process conditions of the furnace temperature of 920-940 degrees Celsius and the carbon activity concentration of 1.1%, carry out strong carburization for 2-3 hours, and then carry out the process conditions of the carbon activity concentration of 0.8%. The carbon diffusion process is carried out for 4 hours to 6 hours. After the carbon diffusion process is completed, the temperature in the furnace is 820-840 degrees Celsius and the carbon activity concentration is 0.8%. The proce...
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Abstract
The invention discloses a heat treatment method for a gadder shank. The method comprises the following steps of carburization direct quenching, high-temperature tempering, repeated quenching, non-tempering and normal-temperature cooling. By the adoption of the technical scheme, the beneficial effects that the fatigue strength, abrasion resisting performance, surface hardness, impact tenacity and other key technology indexes of the shank can be obviously improved can be achieved, and accordingly the defects that in the shank using process, shank fracture, tail end face breakage, thread abrasion and fracture and short fatigue like are likely to be generated are overcome. Compared with the prior art, according to the shank treated through the technical scheme, the crack resistance, fatigue life, abrasion resisting performance, surface hardness and other key technology indexes are obviously improved, and the average life is prolonged to 6-8 times of the original average life.
Description
technical field [0001] The invention relates to the field of surface heat treatment of metal shank tails, in particular to a heat treatment method for rock drill shank tails. Background technique [0002] With the development of my country's iron and steel industry, taphole machines have been widely used in iron and steel plants. The rock drill is the core component of the tapping machine, which has the characteristics of short drilling time, high reliability, large impact power and drilling torque, and convenient operation and maintenance. When the shank is the main part of the rock drill, when it is working, the end face of its tail directly bears the high-frequency and high-power impact contact of the piston of the rock drill, and the impact energy of the piston movement is transferred from the tail end of the shank to the drill rod and the drill bit, so as to carry out the blast furnace opening operation . [0003] Since the shank directly bears the high-frequency impa...
Claims
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IPC IPC(8): C21D1/18C21D9/00C23C8/22
CPCC21D1/18C21D9/0068C23C8/22
Inventor 盘志官唐秉锋
Owner 桂林方兴机械有限公司