High-boron cast steel containing granular boride and preparing method thereof

Abstract

The invention discloses a preparing method of granular boride high-boron cast steel, which comprises the following steps: allocating 0.15%-0.45% C,0.75%-2.70% B, 0.34 %-1.50% Ti, 0.80%-1.20% Cr, 0.50%-1.50% Si, 0.50%-1.50% Mn, 0.04%-0.12% Ce, 0.08%-0.20% Al, 0.03%-0.10% Ca, 0.01%-0.06 N, P<0.05%, S<0.05% and Fe; setting B / C=5.0-6.0, B / Ti=1.8-2.2; adopting electric stove to melt; mixing common scrap steel, pig iron and chromium iron; heating to melt; adding into silicon iron and manganese iron; adding into ferroboron and ferrotitanium before tapping; adjusting furnace-front element to be quality; heating-up; adding into silicon-calcium alloy; pre-deoxidizing; end-deoxidizing with aluminum; micro-alloying; proceeding composite deteriorating process outside of the furnace with cerium and nitrogen; keeping the temperature; proceeding oil-cooling quenching; tempering under the low temperature; getting the product. This invention possesses merits of high hardness and strength and good tenacity and resistance, which can increase the durability of wear resisting part.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant metal materials, and relates to a high-boron cast steel, in particular to a high-boron cast steel containing granular borides and a preparation method thereof. Background technique [0002] Abrasion is common in many industrial sectors such as metallurgy, mining, machinery, electric power, coal, petroleum, transportation, military industry, etc. and has become an important cause of equipment failure or material damage, and is also one of the problems that cause the most economic losses. The development of new anti-wear Materials, reducing metal wear, are of great significance to the national economy. At present, the widely used anti-wear materials mainly include alloy steel and white cast iron. The former has good toughness, but has the disadvantages of low hardness and poor wear resistance. The latter has high hardness and high wear resistance, but is brittle and easy to use. Insufficient...

AI Technical Summary

Problems solved by technology

Since borides do not become granular, but are only distributed in large blocks, the brittleness is relatively high, and the toughness is not very high, only 12.5J, which leads to poor safety and reliability when the material is used under heavy load and impact wear conditions.

Images