What kind of steel has high hardness and good toughness?

模具鋼硬度高，一般而言是指硬度HRC50以上；韌性好，一般是指模具鋼不會斷裂或崩塊。

High hardness of die steel generally refers to hardness above HRC50; Good toughness generally means that the die steel will not break or collapse.

什么鋼材硬度高韌性好？

What kind of steel has high hardness and good toughness?

這個問題大致可以分三種情況來回答：

This question can be answered in three ways:

一種是硬度HRC50-58之間的，韌性好的模具鋼是LG。LG模具鋼硬度HRC56-58，韌性是DC53的8-9倍。

One is the die steel with hardness between hrc50-58 and good toughness is LG. LG die steel has hardness hrc56-58 and toughness 8-9 times that of DC53.

二種是硬度HRC58-60之間，此硬度區間抗崩裂性能好的模具鋼是8566模具鋼。8566模具鋼硬度HRC58-60，它的抗崩裂性能是高速鋼SKH-51的4倍，D2的2倍。

The second is the hardness hrc58-60. The mold steel with good cracking resistance in this hardness range is 8566 mold steel. The hardness of 8566 die steel hrc58-60 is 4 times that of high speed steel skh-51 and 2 times that of D2.

三種是硬度HRC60-62之間，此硬度之間韌性比較好的模具鋼就比較多了，因為沒有具體的實驗數據，不敢說誰好，大致有DC53、LD、8566二代、88、CALDIE。

There are three kinds of hardness: hrc60-62. There are many die steels with good toughness among these hardness. Because there is no specific experimental data, I dare not say who is better. There are roughly DC53, LD, 8566, 88 and caldie.

論模具鋼合金成分。

On the alloy composition of die steel.

合金成分是模具鋼性能的基礎，但模具鋼的性能，除了跟合金成分有關，還和冶煉工藝、熱處理工藝、生產廠家（也就是）有關系。

Alloy composition is the basis for the performance of die steel, but the performance of die steel is not only related to alloy composition, but also related to smelting process, heat treatment process and manufacturer (i.e. brand).

為了買到好的模具鋼，有人強調合金成分含量（也就是模具鋼型號）、強調廠家。可道高一尺魔高一丈，你只能強調看得見的東西，看不見的工藝，還是可以做手腳，降低成本，賺取差額利潤。低級騙子，合金成分上做假；冶煉工藝上做假，不留痕跡，悄無聲息。

In order to buy good die steel, some people emphasize the alloy content (that is, the model of die steel) and the manufacturer. You can only emphasize what you can see and what you can't see. You can still do things to reduce costs and earn profits. A low-level liar who fakes on the alloy composition; The smelting process is fake, leaving no trace and silent.

鋼材還是那個鋼材，廠家還是那個廠家，外殼還是那個外殼；可偷減冶煉工藝，比偷減合金成分掙的更多；還沒人能發覺。可消費者在用的時候品質不穩定、效果達不到，消費者吃啞巴虧。道高一尺魔高一仗，骨子里面的基因，決定的做事風格。

The steel is still the steel, the manufacturer is still the manufacturer, and the shell is still the shell; The smelting process can be stolen to earn more than the alloy composition; No one has found out yet. But when consumers are using it, the quality is unstable and the effect can not be achieved, and consumers are dumbfounded. The way is better than the devil. The genes in your bones determine your work style.

采購模具鋼，選人比選合金成分更重要。

When purchasing die steel, it is more important to select personnel than alloy composition.

鋼材組織偏析是由于凝固或固態相變而導致的鋼中化學成分的不均勻發布稱為偏析。

Steel structure segregation is the uneven release of chemical components in steel caused by solidification or solid phase transformation, which is called segregation.

偏析分為微觀偏析和宏觀偏析。

Segregation is divided into micro segregation and macro segregation.

微觀偏析是指顯微組織紅成分的不均勻發布，是由凝固或固態相變產生的，微觀偏析一般是指枝晶偏析。

Microsegregation refers to the uneven release of red components in microstructure, which is produced by solidification or solid phase transformation. Microsegregation generally refers to dendrite segregation.

微觀偏析可以通過高溫擴散處理減輕，但枝晶偏析有效的辦法是采用爐外精煉冶煉工藝，更大限度地降低鋼中有害雜質（S、P，O、H、N）含量，生產純凈鋼或潔凈鋼。

Micro segregation can be reduced by high-temperature diffusion treatment, but the effective way to eliminate dendrite segregation is to adopt out of furnace refining and smelting process to reduce the content of harmful impurities (s, P, O, h, n) in steel to a greater extent, so as to produce pure steel or clean steel.

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