42CrMo is an ultra-high strength steel with high strength and toughness.
In current，There are main materials for chisels: 42CrMo, 40Cr.
42CrMo4 steel is an ultra-high strength steel with high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low temperature impact toughness. The steel is suitable for manufacturing large and medium-sized plastic molds that require certain strength and toughness.
These characteristics ensure that the hardness of the finished drill rod can reach a high level, at the same time, it has good toughness and good resistance to multiple impacts. The hardness of the drill rod is good, the wear resistance is good, the hardenability is good, and the hardness of the surface of the drill rod and the core can be guaranteed. The absence of tempering brittleness reduces the fracture rate of the drill rod, and the toughness is good. The ability is good, and it is guaranteed that the tail of the drill rod and the piston are not easy to knock off the block. Taken together, it is an ideal material for making drill rods. But the price of raw materials is higher. Therefore, the price of the finished rod is higher. However, the comprehensive cost performance is relatively high.
40Cr is not an ultra-high-strength steel
40Cr is far inferior to 42CrMo in tempering brittleness, fatigue limit and resistance to multiple impacts, but it has good toughness and hardenability. Therefore, the brazing rod made of it as a raw material is not as good as 42CrMo in terms of wear resistance and tail impact. Because it has good toughness, the drill rod is not easy to break. At the same time, the cost of its raw materials is lower than 42CrMo, so the price of the finished drill rod is more affordable. It is also the most popular type of brazing rod currently on the market. However, in the mine operation, the wear will be faster and the drill rod will be softer. It is not very suitable if you encounter harsh working conditions and environment.
The 42CrMo steel wear resistance is good
It is not easy to break and break the block, but the market price is relatively high, and the overall cost performance is the best. It belongs to a good grade in the current market.40Cr as the raw material is affordable and not easy to break, but it is not as good as 42CrMo in wear resistance and tail knockout. The real cost performance of mine operations is not higher than 42CrMo.
Post time: Jul-21-2022